AS3000:2017 Changes. What you need to know

Transcription

1 AS3000:2017 Changes What you need to know

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10 Note: New additions in Blue normal text, existing in normal black text

11 194 explicit changes 6 new appendices 54 completely new clauses Section 7 has been completely re-written

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13 Part One Section 1 SCOPE, APPLICATION AND FUNDAMENTAL PRINCIPLES Major changes Scope Definitions 34 new & 10 reviewed Clause 1.5 Clause 1.6 Clause 1.7 Clause 1.8 Clause 1.9

14 Part 1 Section 1 Scope, Application and Fundamental Principles Clause 1.1 SCOPE (Last Paragraph) In addition, guidance is provided so that the electrical installation will function correctly for the purpose intended and takes into account mitigating the foreseeable adverse effects of disruption to supply.

15 Clause definitions Clause Accessible Capable of being reached for inspection, maintenance or repairs. Clause Accessible, Readily Capable of being reached quickly and without climbing over or removing obstructions, standing on a chair or using a movable ladder, and in any case not more than 2.0 m above the ground, floor or platform Clause Adjacent Next to or adjoining without obstruction or within arms reach. Clause Alteration An adjustment, change or modification to, or deletion or replacement of, a part(s) of an electrical installation.

16 Clause Arc Fault Detection Device (AFDD) A device intended to mitigate the effects of arcing faults by disconnecting the circuit when an arc fault is detected. Clause Authorised Person The person in charge of the premises, or the licensed electrical contractor or electrician or other competent person appointed or selected by the person in charge of the premises to perform certain duties on the premises. Clause De-energised Separated from all sources of energy, but not necessarily isolated, earthed or out of commission

17 Clause Electrical Fault An Electrical failure, defect or flaw in an electrical circuit, equipment, fixture or fitting and is any situation resulting in unintentional: Loss of current or voltage; or Abnormal flow of Electrical Current; or Abnormal Electrical Voltage levels Clause Electrical Installation - Residential An electrical installation or that portion of an electrical installation associated solely with a living unit or units. e.g. Residential institutions, hotels, boarding houses, hospitals, accommodation houses or motels.

18 Clause Electric Vehicle Any vehicle propelled by an electric motor drawing current from a rechargeable storage battery which is manufactured primarily for use on public streets, roads or highways. Note: Electric vehicles are all road vehicles, including plug-in hybrid road vehicles (PHEV) that derive all or part of their energy from on-board batteries. AS IEC Scope Clause Energised Connected to a source of electrical supply or subject to hazardous, induced or capacitive voltages Clause Fire Mode A specific mode of operation for building systems which is instigated by a fire alarm being activated within the building.

19 Clause Functional unit Part of an assembly comprising all the electrical and mechanical elements that contribute to the fulfilment of the same function. NOTE: Conductors which are connected to a functional unit but which are external to its compartment or enclosed protected space (e.g. auxiliary cables connected to a common compartment) are not considered to form part of the functional unit. [Source: AS/NZS series] Clause Independent person A natural person or entity, free from influence, guidance or control by another or others in relation to the specific matters.

20 Clause Lamp A glass bulb or tube that emits light produced by electricity Clause Lift An apparatus or contrivance within or attached to a building or structure, comprising a platform or car running between approximately vertical guides that are capable of raising or lowering persons. This does not include hoists, escalators or travelators.

21 Clause Main Switch A device or devices, whose primary function is the isolation of supply to the electrical installation by the customer. This device may also fulfil regulatory requirements provided it is labelled accordingly. Clause Multiple Earthed Neutral (MEN) system A system of earthing in which the parts of an installation, required under this Standard to be earthed, are connected to the general mass of earth and, in addition, are connected within the installation to the neutral conductor of the supply system or the PEN conductor. Within the installation, the protective earthing conductor function is separated from the neutral, that is, separate conductors within the installation.

22 Clause Neutral Earthed System (Direct Earthing) A system where the protective earth and neutral conductors from the transformer or generator to the electrical installation are not connected together at any point after the neutral and earth connection at the transformer or generator. Clause Normal Supply The source of supply that the Electrical installation is supplied from under normal conditions of operation (Mains Supply) and excludes any alternative supply (s). (This definition replaced Mains Supply which has been deleted)

23 Clause Outbuilding - Individual A structure completely separated by an area of land from another structure containing the switchboard from which the supply is obtained Clause Outbuilding Combined Two or more structures, installed on the same foundation, or sharing conductive metal roofing or conductive metal frames, with more than one electrical supply, and each separated by an area of land from another structure that contains the switchboard from which those electrical supplies are obtained Clause Protective Earth Neutral (PEN) Neutral and Protective earth functions combined in a single conductor

24 SCOPE, APPLICATION AND FUNDAMENTAL PRINCIPLES Clause 1.4 definitions Clause Protective Earthing Conductor A conductor, other than a main earthing conductor, connecting any portion of the earthing system to the portion of the electrical installation or electrical equipment required to be earthed, or to any other portion of the earthing system. Clause Repair The work to restore the Electrical installation to safe and sound working condition after deterioration or damage which has occurred 15

25 Clause Reduced low voltage A supply voltage giving additional protection against electric shock such as the following: (a) A single-phase system in which (i) the nominal line-to-line voltage does not exceed 110 V a.c.; (ii) the nominal line-to-earth voltage does not exceed 55 V a.c.; and (iii) all exposed conductive parts are connected to the protective conductor. Or (b) A three-phase system in which (i) the nominal line-to-line voltage does not exceed 110 V a.c.; (ii) the nominal line-to-earth voltage does not exceed 63.5 V a.c.; and (iii) all exposed conductive parts are connected to the protective conductor. 16

26 Clause Safety Service A system or component that operates to identify an emergency, or is intended to operate during an emergency, and is primarily associated with (a) the safety of persons evacuating a building; (b) fire-fighting operations; or (c) fire suppression. NOTES 1 For the definition of a fire safety system refer to the National Construction Code (Australia) and 'essential service' in the New Zealand Building Code. 2 Examples of safety services are given in Clause 7.2. Clause Socket Outlet - Multiple combination A socket outlet having two or more sets of contacts intended for making detachable connections with the contacts of two or more plugs. 17

27 Clause Socket Outlet RCD (SRCD) A socket outlet with an incorporated Residual Current Device Clause Soft Wiring A wiring system of pre-terminated flexible cables and matching sockets installed in a fixed position for connection as a sub circuit in an installation. Clause Supplementary Supply A supply system intended to maintain, for reasons other than safety, the functioning of an electrical installation or a part or parts thereof, in case of interruption of the normal supply. Clause Wiring Systems An assembly made up of one or more conductors, cables or busbars and the parts which secure their fixing and, if necessary, their mechanical protection.

28 Added to remove all doubts and confusion within the Industry: Clause Normative Elements of the Standard that are to be complied with. Clause Informative For information and guidance only.

29 Clause Protection against dangers and damage The requirements of this Standard are intended to ensure the safety of persons, livestock, and property against dangers and damage that may arise in the reasonable use of electrical installations. NOTES: 1 A 'shock current' is an electric current of sufficient magnitude and duration to cause an electric shock. AS/NZS provides further information on the effects of shock current through the human body. 2 Protection under normal conditions, referred to as 'protection against direct contact' in the previous edition of this Standard, is now designated 'basic protection' and defined in Clause 'Direct contact' is defined in Clause and illustrated in Figure Protection under fault conditions, referred to as 'protection against indirect contact' in the previous edition of this Standard, is now designated 'fault protection' and defined in Clause 'Indirect contact' is defined in Clause and illustrated in Figure 1.3.

30 Clause General Protection shall be provided against shock current arising from contact with parts that are live in normal service (direct contact) or parts that become live under fault conditions (indirect contact). Therefore, live parts shall not be accessible and accessible conductive parts shall not be live, neither under normal conditions nor under single fault conditions. Clauses 1.5.4, 1.5.5, and specify essential requirements regarding protection against electric shock including basic protection and fault protection. They also deal with the application of these requirements in relation to external influences, such as damp situations.

31 Protection by Barriers or enclosures (a) Degree of protection (i) (existing remains the same) (ii) (existing remains the same) (iii) Any IP rating shall suit the environmental conditions and the relevant mounting position as specified by the manufacturer. Eg. Weatherproof enclosure mounted vertically may be IP65 but horizontally has IP?? Eg. Cannot drill a hole in the bottom of an IP rated enclosure to let out condensation or water.

32 1.6.1 Design of an electrical Installation An electrical installation shall be designed to - (a) (existing unchanged) (b) (c) (existing unchanged) (existing unchanged) (d) minimize inconvenience in the event of a fault in installations (e) where occupants are vulnerable; consideration should be given to the provisions of Appendix M in the event of a disruption of supply

33 1.7.1 SELECTION AND INSTALLATION OF ELECTRICAL EQUIPMENT Electrical equipment, forming part of an electrical installation, shall be selected and installed to (a) (b) (c) operate in a safe and reliable manner in the course of normal operating conditions; selected and installed so as not to cause a danger from electric shock, fire, high temperature or physical injury in the event of reasonably expected conditions of abnormal operation, overload, fault or external influences that may apply in the electrical installation; and installed in accordance with the manufacturer's instructions.

34 1.7.2 (f) Installation work practice In order to address the essential requirement of Clause 1.7.1, electrical equipment shall be installed in accordance with safe and sound work practices including the following considerations: (a) to (e) existing, (f) Installation wiring conductors shall be clearly identified to indicate their intended function as active, neutral, Protective Earthing (PE) or Equipotential Bonding (EPB) conductors. Conductors with a green/yellow (G/Y) combination core insulation colour or sleeving colour or sheathing colour are strictly reserved for identifying the Protective Earthing (PE) conductor, Protective Earth and Neutral (PEN) conductor or the Equipotential Bonding (EPB) conductor and shall not be used as live conductors (active or neutral).

35 (i) Condensation issues. Installation of breathing or pressure equalization valve to assist in changes in humidity and drainage of moisture (j) Electrical equipment shall be installed to manufacturers instructions to ensure the marked IP rating is maintained Weep holes are not acceptable

36 Clause Equipment selection Clause text remains the same Notes Updated 1 Appendix A lists the electrical equipment Standards referred to in this Standard. Separate lists are provided for (a) normative references, which are cited in such a way that makes them indispensable for the application of this Standard and have to be complied with in order to satisfy particular parts or clauses of this Standard; and (b) (c) deemed to comply references... informative references, which are provided for information and guidance purposes only. 2 Equipment that bears the Regulatory Compliance Mark satisfies the relevant regulatory requirements for electrical safety and can be presumed to comply with the requirements of Clause The conditions for the use of the mark, including references to specific Standards for which it applies, are set out in AS/NZS Regulatory authorities may also accept other marks or means of determining that equipment satisfies the relevant regulatory requirements for electrical safety.

37 Clause 1.8 Verification (Clause text remains same) Notes updated NOTE: 1. Section 8 sets out requirements for the verification and testing of electrical installations. 2. Appendix K - Guideline for Inspection & Verification of Switchboards >800Amps. Clause Compliance with the requirements of other standards Refer to Clause 7.8 for standards applicable to specific electrical installations and Appendix A for a full list of normative references. NOTE: Appendix A also lists deemed to comply and informative references

38 Clause Alterations Alterations to electrical installations shall comply with all relevant provisions of this Standard. Alterations to electrical installations shall not cause any portion of the original electrical installation, or electrical equipment connected thereto, to (a) carry currents or sustain voltages in excess of those permitted by this Standard; or (b) be used in any manner that is not in accordance with this Standard. Alterations to an electrical installation constructed to a Part 1 design and installation solution shall not alter the compliance of that installation with Part 1

39 Repairs Repairs to existing electrical installations or parts thereof may be effected using methods, fixtures and fittings that were acceptable when that part of the electrical installation was originally installed or with methods, fixtures and fittings currently available as direct replacement, provided that the methods satisfy the fundamental safety principles of Part 1 of this Standard. Clause Repair The work to restore the Electrical installation to safe and sound working condition after deterioration or damage which has occurred (Repairs are only done to the standard that applied at the time of the install. Repairs are the minimum required to bring the installation back to a safe and functional state.)

40 Use of a Part 1 design and installation solution This Clause does not apply to domestic electrical installations Notification Notification that a Part 1 solution has been used shall be provided by a label placed at the main switchboard Identification On the adoption of a Part 1 solution in relation to an electrical installation, the main switchboard of the installation where the Part 1 solution has been adopted, and any other switchboard that is associated with the Part 1 solution, shall be clearly and permanently marked with the following words: WARNING: PARTS OF THIS INSTALLATION ADOPT A PART 1 SOLUTION UNDER THE WIRING RULES.

41 Part Two Section 2 GENERAL ARRANGEMENT, CONTROL AND PROTECTION Major changes 2.1 General 2.2 ARRANGEMENT OF ELECTRICAL INSTALLATION 2.3 CONTROL OF ELECTRICAL INSTALLATION 2.4 FAULT PROTECTION 2.5 PROTECTION AGAINST OVERCURRENT 2.6 ADDITIONAL PROTECTION BY RESIDUAL CURRENT DEVICES PROTECTION AGAINST OVERVOLTAGE 2.8 PROTECTION AGAINST UNDERVOLTAGE 2.9 PROTECTION AGAINST ARC FAULTS New AFDD s 2.10 SWITCHBOARDS - Was clause 2.9

42 2.1.1 Application The provisions of this Section form the minimum standard in relation to the selection and installation of switchgear and controlgear that shall be achieved to satisfy Part 1 of this Standard Origin of submains and final subcircuits Every submain and every final subcircuit shall commence at a main switchboard or at a distribution switchboard. All of the live conductors of one submain or one final subcircuit shall commence at the one switchboard.

43 Electric vehicle charging circuits in Australia Guidance for installations for electric vehicle charging circuits is provided in Appendix P Maximum demand The maximum demand in consumer mains, submains and final subcircuits, taking account of the physical distribution and intended usage of electrical equipment in the electrical installation and the manner in which the present requirements might vary, shall be Determined using one of the methods set out in Items (a) to (d). (c) Measurement The maximum demand may be determined by the highest rate of consumption of electricity recorded or sustained over a period of 30 minutes when demand is at its highest by a maximum demand indicator or recorder

44 Direct current systems All poles of a d.c. circuit shall be capable of being isolated by a device for isolation. NOTE: Guidance is provided in Appendix Q on the installation of D.C. systems. (Exceptions remain unchanged) General New Exception: Exception: Main switches for alternative or supplementary supplies may be located at any switchboard within the installation, provided they are installed in accordance with an applicable standard, for example, AS/NZS 3010 or AS/NZS

45 Main Switches, Location and operation Main switches shall be accessible as follows: (b) Main switches, operating handles or controls associated with such a main switch shall be of a type which is manually operated, single action, mechanical and shall consist of a handle, lever, push buttons or similar device. Electronic touch screens may be used for additional remote control.

46 Remote Control (c) Where remote control facilities also provide the capability for a main switch to be closed (i) (remains unchanged) (ii) the main switch shall have facility for a suitable device to enable it to be locked in the open position, in accordance with Clause ; and (iii) shall not be capable of being overridden or bypassed by programmable control systems or the like.

47 General Means shall be provided for emergency switching of any part of an electrical installation where it may be necessary to control the supply to remove an unexpected danger. Where required, because of the risk of electric shock or physical injury, the emergency switching device shall be an isolating device.

48 Emergency switching devices Means for emergency switching shall consist of (a) Remains unchanged (b) a combination of several items of electrical equipment operated by one single action resulting in the removal of the hazard by interrupting the appropriate supply. Devices for emergency switching shall (i) (iv) remains unchanged (v) where danger is likely to occur, require manual reset before the electrical equipment can be started.

49 General requirements Note updated. Overcurrent protection is inseparably linked to the current-carrying capacity and temperature limits of the protected cable. Reduction in current-carrying capacity of conductors may occur by a change in cross-sectional area, method of installation, or type of cable or conductor Consumer mains Overcurrent protection of consumer mains shall be arranged in accordance with one of the following: (a), (b) or (c) (remain unchanged) This arrangement is regarded as unprotected consumer mains

50 NOTE: Protection is required by Clauses 2.5.2, or to be at the origin of every circuit and at each point where a reduction in current-carrying capacity occurs, unless exceptions in Clauses or apply. FIGURE GENERAL PROTECTION AGAINST OVERLOAD (OL) AND SHORT- CIRCUIT (SC) FOR SUBMAINS AND FINAL SUBCIRCUITS

51 Characteristics of short-circuit protective devices Short-circuit protective devices shall meet the following conditions: Notes updated 1. Values of K for conductors in various conditions of service are given in the AS/NZS series, e.g. for copper conductors with PVC insulation, K = 111 for 40 C ambient. l for PVC insulated copper conductors of crosssectional area not more than 300 mm2, K = 111 for 75 C initial conductor temperature.

52 Updated figs: FIGURE GENERAL PROTECTION AGAINST OVERLOAD (OL) AND SHORT-CIRCUIT (SC) FOR SUBMAINS AND FINAL SUBCIRCUITS FIGURE A PROTECTIVE DEVICE OF LOW BREAKING CAPACITY WITH A DEVICE OF REQUIRED BREAKING CAPACITY INSTALLED ON THE SUPPLY SIDE FIGURE 2.2 MANDATORY OMISSION OF OVERLOAD AND/OR SHORT-CIRCUIT PROTECTION FIGURE 2.3 ALTERNATIVE POSITION OF OVERLOAD PROTECTION FIGURE 2.4 ALTERNATIVE POSITION OF OVERLOAD PROTECTION

53 Updated figs: FIGURE 2.5 OMISSION OF OVERLOAD PROTECTION FIGURE 2.6 OMISSION OF OVERLOAD PROTECTION FIGURE 2.7 ALTERNATIVE POSITION OF SHORT-CIRCUIT PROTECTIVE DEVICE FIGURE 2.8 CONDUCTORS CONNECTING SOURCES OF SUPPLY TO THEIR ASSOCIATED SWITCHBOARD FIGURE 2.9 REQUIRED LOCATIONS AND ALTERNATIVE LOCATIONS OF OVERLOAD AND SHORT-CIRCUIT PROTECTION

54 2.5.5 Protection against switchboard internal arcing fault currents General Protection against arcing fault currents while the equipment is in service, or is undergoing maintenance, shall be provided for switchboards rated to 800 A or greater, or connected to a prospective fault current level greater than or equal to 16kA. NOTE: Heavy current circuits are regarded as those where the nominal supply current to the switchboard is 100 A or more per phase.

55 Safety service circuit discrimination (selectivity) Protective devices shall be selected such that, in accordance with Clause (a) and (b) remain unchanged NOTES: 1 This discrimination (selectivity) is intended to apply only up to the level of an arcing fault, which is deemed to be in the range of 30% to 60% of the prospective short-circuit current. 2 An example of protective devices and the arcing fault current is shown in Figure 2.12.

56 General supply circuit discrimination (selectivity) (a) Circuit-breakers Two circuit-breakers, connected such that C2 is the downstream device and C1 the upstream device, shall be selected as follows: (i) For ratings of C2 greater than or equal to 800 A, discrimination shall be provided between overload curves, e.g. long time LT curve, up to and including the instantaneous setting (Ii) or short delay setting (ISD) of C1. A co-ordination study with all curves shown shall be provided as there are no deemed values allowed for C2 greater than or equal to 800 A. Examples are given in Figure 2.13.

57 General supply circuit discrimination (selectivity) (a) (ii) For ratings of C2 greater than or equal to 250 A and less than 800 A, discrimination shall be provided between overload curves, and is recommended up to and including the instantaneous setting (Ii) or short delay setting (ISD) of C1. Deemed to comply discrimination (selectivity) for circuit breakers from 250 A and less than 800 A is achieved if (A) the overload setting of C1 1.6 C2, e.g A with 630 A; (B) the short time delay setting (ISD) or instantaneous setting (Ii) of C1 1.6 C2, e.g. C1 = A with C2 = A; and (C) the instantaneous setting (li) of C1 and C2 is achieved by separation at the rated prospective short-circuit current available at that point of the electrical installation.

58 General supply circuit discrimination (selectivity) (a) (iii) For ratings of C2 less than 250 A, discrimination shall be provided between overload curves and is recommended for the instantaneous setting (Ii) or short time delay setting (ISD) of C1. NOTE: ISD is not available on MCBs and only available on some MCCBs (electronic trip units). For circuit breakers for circuits less than 250A discrimination is deemed to comply if the upstream breaker is equal to or greater than 1.5 times the downstream breaker. (see Figures 2.13 to 2.15). Eg 63A mcb mains with 40A mcb submains, From new edition 40 x 1.5 = 60 From current edition 40 x 2 = 80

59 General supply circuit discrimination (selectivity) (b) Fuses Two fuses connected such that F2 is the downstream device and F1 the upstream device shall be selected such that the characteristics of the devices provide discrimination (selectivity) on overload and is recommended for short circuit (see Figure 2.16). Discrimination (selectivity) between HRC fuses is deemed to be achieved (i) overload when F1 1.6 F2, e.g. 16 A with 10 A; and (ii) short-circuit when F1 2 F2, e.g. 20 A with 10 A. NOTE: Overload curves are those for times >0.01 s. Short-circuit data is based on the total I2t of F2 pre-arcing I2t of F1.

60 General supply circuit discrimination (selectivity) (c) Fuse and circuit-breaker A fuse and a circuit-breaker connected such that C2 is the downstream device and F1 the upstream device shall be selected such that the characteristics of the devices provide discrimination (selectivity) between the overload curve and the instantaneous setting or short delay setting (ISD) of C2 and the time/current curve of F1 (see Figure 2.17).

61 Updated figs: FIGURE 2.12 CIRCUIT-BREAKER CURVES GENERAL EXPLANATION, SETTINGS AND ZONES FIGURE 2.13 CIRCUIT-BREAKER CURVES WITH DISCRIMINATION REQUIREMENTS BETWEEN CIRCUIT BREAKERS RATED GREATER THAN 800 A FIGURE 2.14 CIRCUIT-BREAKER CURVES WITH DISCRIMINATION REQUIREMENTS BETWEEN CIRCUIT BREAKERS RATED GREATER THAN 250 A AND UP TO 800 A FIGURE 2.15 CIRCUIT-BREAKER CURVES WITH DISCRIMINATION REQUIREMENTS BETWEEN CIRCUIT BREAKERS RATED LESS THAN 250 A FIGURE 2.16 FUSE CURVES WITH DISCRIMINATION REQUIREMENTS FIGURE 2.17 FUSE CURVES AND CIRCUIT-BREAKER CURVES WITH DISCRIMINATION REQUIREMENTS

62 2.6 Additional protection by RCDs Types of RCDs The rule has been split between Australian requirements and New Zealand requirements. The information remains the same. The addition of SRCDs is included - Socket outlets incorporating an RCD

63 Domestic & Residential installations Additional protection by RCDs with a maximum rated residual current of 30mA shall be provided for all final subcircuits in domestic and residential electrical installations. Where protection of final subcircuits is required, RCDs shall be installed at the switchboard at which the final subcircuit originates. All circuits will be protected with no exemptions for type or load or current ratting of the load. Modern elements are manufactured with sealed ends so moister ingress resulting in increased leakage or nuisance tripping is not an issue. If and RCD trips with a load incorporating an element, there is a fault in the element.

64 Eg. What is the minimum IR required on an element 10,000 Ω What does an RCD trip at 30mA R=V/I, 240/.03 = 8000 Ω Exceptions: RCD protection need not apply to repairs

65 RCD s Clause Location Original Clause Structure Where additional protection is required Residential electric installations Other electrical installations Australia New Zealand Home medical patient treatment installations Alterations, additions and repairs RCD s Clause Location New Clause Structure Location General Residential electrical installations Non-Residential electrical installations Non-Residential electrical installations - AU Education and Childcare locations AU Non-Residential electrical installations - NZ Education and Childcare locations NZ Home care installations Alterations, additions and repairs General Socket-outlets Switchboards

66 Non-domestic and Non-Residential installations Additional protection by RCDs with a maximum rated residual current of 30mA shall be provided for all lighting and socket outlet final subcircuits not greater than 32A (up from 20A) as well as the need to perform a risk assessment on all fixed equipment to determine if the circuit requires RCD protection. The assessment will consider issues such as other methods of protection, separated supplies where disconnection of the circuit by RCD could cause a danger greater than the earth leakage. Eg Traffic lights Where the connected equipment is essential to the performance of the owner operator and operation of the RCD would adversely affect the sites function. This assessment may trigger Occupational Health and Safety provisions. All fixed equipment shall be protected unless a risk assessment determines that the protection is not required.

67 Home Care medical installations The installation of medical equipment in a home care situation shall comply with AS3003 Patient Areas. Rules will change to remove the dedicated circuit requirements and reference further information on appendix M Alteration Repairs and Replacement of switchboards (previously Alterations, additions and repairs, clarifying that it is for switchboard specifically)

68 Clause 2.9 PROTECTION AGAINST ARC FAULTS Clause Protection against arc faults Clause Type Clause Rating Clause Arrangement Clause Alterations, additions and repairs Clause Final subcircuits in New Zealand Clause Protection against fire hazards due to arcing

69 2.9 Protection against Arc Faults General Protection devices such as Arc Fault Detection Devices AFDDs may be used to protect against the affects of arc faults in final subcircuits especially in premises with sleeping accommodation, locations with risks of fire due to the nature of process of stored material, location with combustible construction material. The device is for the detection of arc fault in subcircuit wiring not in a switchboard and not to be confused with switchboard arc faults, arc containment or arc blasts. Rules regarding the types, ratings and arrangement of AFDDs is provided in subsequent clauses and Appendix O (Not mandatory but good practice. Does not have overcurrent or RCD protection. Will detect arks in cables and loose screws.)

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71 Accessibility and emergency exit facilities Switchboards shall be- (c) be provided with sufficient exit facilities to enable a person to leave the vicinity of a switchboard under emergency conditions. (i) (ii) 1.0 m minimum from all accessible faces of a closed switchboard. Unimpeded space of at least 0.6 m around switchboards with switchgear doors in any position and with switchgear in a fully racked out position (see Figures 2.18 to 2.22). (iii) a minimum of two exit paths spaced well apart, where a switchboard (A) has a prospective short-circuit current of not less than 16 ka; (B) is supplied by a circuit with a nominal capacity of not less than 800 A per phase; or (C) is more than 3 meters in length. Exception: if the door is more than 3 meters away from the switchboard only a single door is required. (iv) Openings or doorways that are at least 0.9 m wide by 2.2 m high to allow persons necessary access to the switchboard room or enclosure.

72 Updated figs: FIGURE 2.18 ACCESS TO SWITCHBOARDS FREESTANDING SWITCHBOARD WITH RACK-OUT SWITCHGEAR FIGURE 2.19 ACCESS TO SWITCHBOARDS SWITCHBOARD IN CORNER POSITION FIGURE 2.20 ACCESS TO SWITCHBOARDS SWITCHBOARD WITH ONE END AGAINST WALL FIGURE 2.21 ACCESS TO SWITCHBOARDS SWITCHBOARDS WITH DOORS THAT OPEN INTO ACCESSWAYS OR NARROW PASSAGEWAYS FIGURE 2.22 ACCESS TO SWITCHBOARDS FACING SWITCHBOARDS

73 FIGURE 2.18 ACCESS TO SWITCHBOARDS FREESTANDING SWITCHBOARD WITH RACK-OUT SWITCHGEAR

74 FIGURE 2.19 ACCESS TO SWITCHBOARDS SWITCHBOARD IN CORNER POSITION

75 FIGURE 2.20 ACCESS TO SWITCHBOARDS SWITCHBOARD WITH ONE END AGAINST WALL

76 FIGURE 2.21 ACCESS TO SWITCHBOARDS SWITCHBOARDS WITH DOORS THAT OPEN INTO ACCESSWAYS OR NARROW PASSAGEWAYS

77 FIGURE 2.22 ACCESS TO SWITCHBOARDS FACING SWITCHBOARDS

78 Suitability Switchboards shall be suitable to withstand the mechanical, electrical and thermal stresses that are likely to occur in service, and the environment in which it is to be installed. Switchboards complying with the relevant requirements of the AS/NZS 3439 or AS/NZS series of Standards are considered to meet the requirements of this Clause (Clause ). Appendix K provides recommendations and requirements on the relevant design verification and validity tests applicable to switchboards complying with AS/NZS series. NOTES: 1 Appendix K is not a substitution for the requirements of AS/NZS 3439 or the AS/NZS series. Note 2 & 3 remain unchanged

79 Location of fuses and circuit-breakers Fuses and circuit breakers shall be located in the following ways: (a) Grouping Fuses and circuit breakers shall be grouped in such a manner as to indicate their relationship to each other, e.g. equipment sump pump motor. (b) On the back of switchboards or behind switchboard escutcheons Fuses or circuit breakers shall not be fixed on the back of, or behind, a switchboard panel, frame or escutcheon. Exceptions: 1 Fuses used for the following purposes may be fixed on the back of or behind, a switchboard panel, frame or escutcheon: Used solely as a fault-current limiter. Used to protect instruments or control equipment on the switchboard. 2 Circuit breakers may be fixed on the back of, or behind, a switchboard panel frame or escutcheon provided that they may be operated from the front of the switchboard panel frame or escutcheon; if used solely as a fault-current limiter; or if used to protect instruments or control equipment on the switchboard.

80 Neutral bar New paragraph before exception Where a cable is used as the neutral conductor, and is looped between devices on the line side, the connection to each device shall be such that continuity remains when the device is removed. Twisting of conductors is not adequate. Cannot rely on the connection within the device to maintain the connection of a neutral to another device.

81 Section 3 Major changes: 3.1 GENERAL 3.2 TYPES OF WIRING SYSTEMS 3.3 EXTERNAL INFLUENCES 3.4 CURRENT-CARRYING CAPACITY 3.9 INSTALLATION REQUIREMENTS 3.11 UNDERGROUND WIRING SYSTEMS

82 3.1.1 Application The provisions of this Section form the minimum standard in relation to the selection and installation of wiring systems that shall be achieved to satisfy Part 1 of this Standard. 3.2 TYPES OF WIRING SYSTEMS The type of wiring system and method of installation used shall either (a) comply with Table 3.1; or (b) have a degree of safety equivalent to that given in Table 3.1. and comply with the requirements of this Section.

83 Thermal insulation Where V75 and V90 cables 10 mm2 pass through bulk thermal insulation they shall be rated for current-carrying capacity, in accordance with the AS/NZS series as follows: Length of cable passing through insulation (a) 150 mm use in air touching a surface rating; (b) >150 mm to 400 mm use partially surrounded rating; and (c) >400 mm use completely surrounded rating.

84 3.4 CURRENT-CARRYING CAPACITY General Every conductor shall have a current-carrying capacity not less than the current to be carried by the conductor, in accordance with the AS/NZS series. In determining the required current-carrying capacity, provision shall be made for reasonably foreseeable changes to external influences, such as the installation of thermal insulation in ceiling spaces and walls. Wiring systems in domestic installations shall be installed on the assumption that thermal insulation in ceilings, walls and under floors, if not currently installed, will be installed in the future.

85 Sleeving existing earthing and bonding conductors Where installation of earthing or bonding conductors have been previously installed using bare or green conductors complying with previous editions of this standard then those earthing or can remain for their intended use. When alterations or repairs are carried out the resulting new terminations or junctions to these existing bare or green conductors, then all of the bare or green conductors shall be sleeved with green/yellow sleeving within each of the new junctions or terminations.

86 Sleeving existing Live conductors Sleeving of existing live conductors in installations where yellow insulation have been previously installed as a live conductor complying with previous editions of this standard then those live conductors can remain for their intended use. When alterations or repairs are carried out the resulting new terminations or junctions to these existing live yellow conductors, then all of the live yellow conductors shall be sleeved with yellow sleeving within each of the new junctions or terminations.

87 Wiring systems likely to be disturbed Wiring systems installed in the following locations are deemed likely to be disturbed: (c) In parts of a ceiling space where access is greater than 0.6 m in height. New Paragraph inserted after (e) Wiring systems installed in positions where they are likely to be disturbed shall be (i) (ii) supported at suitable intervals to prevent the undue sagging of cables; supported to prevent single insulated cables from being accidently withdrawn from electrical equipment; and (iii) protected from mechanical damage as specified in Clause RCDs shall not be used in lieu of mechanical protection for wiring systems that are likely to be disturbed.

88 Wiring systems near building surfaces Wiring systems that are fixed in position by either fasteners or by passing through an opening in a structural member shall be protected by one of the methods outlined in Clause if they are concealed within 50 mm from the surface of a wall, floor, ceiling or roof. And located more than 150 mm from internal wall-to-wall or wall-to-ceiling corners. Exception: These requirements need not apply to wiring systems that can move freely to a point not less than 50 mm from the surface in the event of a nail or screw penetrating the cavity at the location of the wiring system. Figures 3.3 to 3.5 provide examples of protection of wiring systems near building surfaces.

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90

91 For clarification Protection methods Where protection of a wiring system is required, in accordance with Clauses and , the wiring system shall be (a) provided with adequate mechanical protection to prevent damage; or (b) provided with an earthed metallic armouring, screen, covering or enclosure; or (c) protected by an RCD with a maximum rated operating residual current of 30 ma. So Mains and submains will require a or b, Final subcircuits need only be RCD protected.

92 Different electrical installations Common enclosure/cable Conductors for the following applications shall not be installed within the same pipe, tube, conduit or the same multi-core cable: (a) Conductors that form part of different electrical installations. Or (b) Conductors that form part of individual occupancies of single or multiple electrical installations. Exception: These requirements need not apply to switchboards at which circuits are terminated. NOTES: 1 Wiring enclosures such as ducts or cable trays, with removable covers or with no covers at all, where the cables can be accessed without cutting or destroying the enclosure, and have effective segregation are deemed to comply with Clause Effective segregation may be achieved by the use of independently sheathed cables, barriers of fire-resisting material or by distance (minimum 50 mm).

93 Different electrical installations

94 Section 4 Major Changes SELECTION AND INSTALLATION OF APPLIANCES AND ACCESSORIES 4.1 GENERAL 4.3 CONNECTION OF ELECTRICAL EQUIPMENT 4.4 SOCKET-OUTLETS 4.5 LIGHTING EQUIPMENT AND 4.7 COOKING APPLIANCES 4.8 APPLIANCES PRODUCING HOT WATER OR STEAM 4.18 GAS APPLIANCES AND EQUIPMENT 4.19 AIRCONDITIONING AND HEAT PUMP SYSTEMS

95 4.1.1 Application The provisions of this Section form the minimum standard for the selection and installation of appliances, accessories and other electrical equipment not specifically covered in other Sections of Part 2 of this Standard that shall be achieved to satisfy Part 1 of this Standard Selection and installation Electrical equipment shall be selected and installed to perform the following functions, or to have the following features, associated with the proper design, correct construction and safe operation of the electrical installation: (a) (d) remain unchanged (e) Installed in accordance with the minimum requirements of this Section, and the additional requirements as specified in the manufacturer s instructions.

96 4.1.3 External influences (additional note and text at end of clause) NOTE: AS provides an IP classification and marking system for electrical equipment and enclosures that provide different degrees of protection against the entry of water and solid objects. NOTE 2: Purpose-made, anticondensation and water drains that maintain the IP rating of the enclosure may be used. NOTE 3: Drilling a drain hole in the enclosure alone destroys the IP rating of the enclosure. Exemption: for meter enclosures may be rated at IP23 Electrical accessories located in the shaded area most have a degree of protection rated at IP33 or greater. Refer to Figures 4.1 and 4.2. The old unwritten rule of thumb of 45 degrees is not acceptable.

97 SCHNEIDER ELECTRIC Watertight condensationless valves

98 FIGURE 4.1 AREAS UNDER AN OVERHANG REQUIRING IP33 (SIDE VIEW)

99 FIGURE 4.2 AREAS UNDER AND OVERHANG REQUIRING IP33

100 4.3.3 Installation wiring connected via an installation coupler General Flexible cords connected by means of an installation coupler shall meet the following requirements Arrangement Only flexible cords or flexible cables shall be used, and shall be (a) connected to fixed wiring by means of an installation coupler; (b) of heavy-duty sheathed type complying with AS/NZS 3191 and the requirements of Clause ; (c) selected to suit the protection device and in any case shall not be less than 2.5 mm2; (d) adequately protected and installed to minimize the risk of mechanical damage in accordance with Clause ; (e) supported and fixed in position in accordance with Clause and Clause ; and (f) as short as practicable.

101 Socket-outlets for these systems Socket-outlets supplied by these systems shall meet the following requirements: (a) The socket-outlet shall be suitable for the intended application and comply with Clause 4.4. (b) The socket-outlet shall be secured in position and installed in accordance with Clauses and (c) When installed on a horizontal surface, socket-outlets shall be designed or arranged to prevent the accumulation of dust or water. (d) Where installed in a location that is not readily accessible, the socket outlet shall be securely fixed to a structure or support to ensure that no mechanical strain is placed on the installation wiring connections when inserting or removing a plug from the socket-outlet.

102 4.4 Socket Outlet General Different systems A Low Voltage fixed switch or socket outlet or its faceplate shall not incorporate a connecting device for telecommunications or data, television, radio or other similar wiring systems. Note: USB charging outlets on the faceplate are acceptable.

103 Protection of socket-outlets (a) (e) remain unchanged Added the following subclauses (f) Socket-outlets shall not be installed in the prohibited location immediately adjacent to any gas or electric cooking surface, as shown in Figure (g) Where socket-outlets are installed in building surfaces that are required to provide fire-resistance or acoustic properties, measures shall be taken to ensure that these properties are maintained

104 FIGURE 4.17 Prohibited locations for socket outlets installed near cooking surfaces whether gas or electric

105 4.5.1 Lampholders All lampholders shall be located to be adequately protected against damage that might reasonably be expected. In order to protect against inadvertent contact with live parts, low voltage lampholders shall be located to minimize the risk of (a) direct contact with live parts of a lampholder when the lamp is removed; and (b) mechanical damage to the lamp or lampholder. These requirements may be satisfied by (i) installation not less than 1.8 m above the ground, floor or platform, or (ii) provision of a suitable guard for the lamp and its lampholder, or (iii) the lampholder is incorporated in a luminaire. NOTE: A pendant lampholder should not be exposed to the effects of significant movement of air, e.g. outdoors or where exposed to the operation of fans, etc.

106 The removal of point (iii) from the existing requirements means that lampholders in a luminaire must also meet the requirements for access to live parts and mechanical damage (a) and (b). This creates issues with stage and makeup mirror lighting.

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108 Recessed Luminaires The Entire clause rewritten to include the latest changes to AS/NZS and previous NZ only requirements Clause is split into shall requirements and should considerations

109 Warning sign Where Non-IC/IC-F Class recessed luminaires are installed in an accessible roof space, a permanent and legible warning sign shall be installed in the roof space adjacent to the access panel, in a position that is visible to a person entering the space. The sign shall comply with AS 1319 and contain the words shown in Figure 4.8 with a minimum size of lettering of 10 mm. is indicative only.

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113 Clause Classifications of recessed luminaires

114 Clause Classifications of recessed luminaires

115 Clause Classifications of recessed luminaires

116 Clause Classifications of recessed luminaires

117 Clause Classifications of recessed luminaires

118 Installation The following requirements shall be undertaken for the installation of recessed luminaires: (a) Suitably designed and certified recessed luminaires have installation classifications and shall be marked accordingly. The manufacturer s instructions shall provide all details in regard to restrictions for installation in certain applications. (b) Unmarked light fittings shall be treated as Do Not Cover. For these typical fittings, the installation method shall be to provide barriers [compliance method (ii)] or clearances [compliance method (iii)] during installation, so as to prevent contact with materials that may impede air flow (e.g. thermal insulation) or that may be affected by the high temperature (e.g. combustible building elements and insulation).

119 Installation (f) Unless the auxiliary equipment instructions permit otherwise, any auxiliary equipment operating at a high temperature shall be installed above any insulation as illustrated in Figure (g) If the recessed luminaire is supplied with a detachable barrier, the complete luminaire, including its barrier, shall be installed. (h) For recessed luminaires with lamps of wattage higher than 100 W, only compliance methods (i) or (iii), shall be used. (i) Bulk thermal insulation may also be retrofitted, added or altered, in which case precautions shall be applied by the insulation installer, where recessed luminaires are present, or the luminaire installer, where insulation is present.

120 Installation The following precautions should be considered for the installation of recessed luminaires: (i) (ii) The heat generated from lamps should be dissipated in order to prevent overtemperature damage to the luminaire or to adjacent materials. Cooling air circulation through or around the equipment is a requirement for the typical range of recessed luminaires. AS/NZS and AS/NZS :2016, Appendix ZZ, detail the test method and the maximum surface temperatures permitted for recessed luminaires. The maximum temperature of adjacent materials is to be no more than 90 C. Under National Construction Code requirements, bulk thermal insulation is prevalent in modern building construction within roofs, ceilings, walls and floors depending on the type of building and its climate zone. AS 3999 (in Australia) and NZS 4246 (in New Zealand) include instructions for insulation installers in relation to clearances from recessed luminaires and other types of electrical equipment that may be adversely affected by lack of cooling air circulation.

121 4.7.1 Switching device A circuit for a fixed or stationary cooking appliance having an open cooking surface incorporating electric heating, e.g. a cooktop, deep fat fryer, barbecue griddle or similar, shall be provided with a switch, operating in all active conductors, mounted near the appliance in a visible and readily accessible position. Switches shall not be mounted on the cooking appliance and shall not be mounted in such a position that the user must reach across the open cooking surface to operate them. Switches for cooking appliances, including the combined gas/electric cooking appliances specified in Clause , shall not be located in the prohibited location shown in Figure 4.17.

122 4.7.3 Clearance from open cooking surfaces Socket-outlets and switches shall not be installed in the prohibited locations shown in Figure 4.17, on any wall, cupboard or other surface within 150mm, of the edge of the open gas or electric cooking surface, in the area extending from the top of the cooking surface to a range hood, cupboard or ceiling located directly above the cooking surface or 2.5 meters above the floor that is directly below the cooking surface whichever is the lower.

123 FIGURE 4.17 Prohibited locations for socket outlets installed near cooking surfaces whether gas or electric

124 Isolator (Hot Water systems) Every fixed wired water heater shall be provided with an independent isolating switch lockable in accordance with Clause The isolating switch shall be (a) additional to any automatic switch incorporated in the heater structure; (b) installed adjacent to but not on the water heater. Where a water heater is supplied by two or more final subcircuits all of the final subcircuits for that heater shall be capable of being isolated by a single switch. The use of a circuit breaker in a switchboard as insolation device no longer complies.

125 Hot particles and surfaces Electrical equipment that may produce hot particles or hot surfaces, and is located less than 3.5 m above the hazardous area shown in Figure 4.12 shall be either totally enclosed or provided with suitable guards or screens, to prevent any ignition sources falling into the hazardous area. NOTES: 1 Such electrical equipment may include (a) fuses that may produce arcs, sparks or hot particles; (b) switches that may produce arcs, sparks or hot particles; (c) motors or generators that have sliding contacts or brushes; (d) heaters, heating elements or other equipment that may produce arcs, sparks or hot particles; (e) auxiliary equipment such as ballasts, capacitors and starting switches for all types of discharge luminaires; and (f) lamps. 2 For further information, refer to AS/NZS and AS/NZS 5601, particularly for gases lighter than air.

126 Gas relief vent terminal Electrical equipment that is a source of ignition, such as socket-outlets, switches, luminaires, switchboards, meter boxes and airconditioners, shall not be installed within the exclusion zones shown in Figure 4.13 for gas relief vent terminals.

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128 4.19 AIRCONDITIONING AND HEAT PUMP SYSTEMS Airconditioning and heat pump systems incorporating a compressor shall be provided with a lockable isolating switch installed adjacent to but not on the unit, which isolates all parts of the system, including ancillary equipment, from the same location. For split system airconditioning units, where the manufacturer requires the airconditioning system to be connected to the electricity supply by means of a plug and socket at the internal unit, the isolating switch installed at the external unit shall control the socket-outlet located at the internal unit. For airconditioning systems including room heaters incorporating a compressor where the internal head unit or units are supplied from a circuit separate from that of the compressor a warning sign shall be permanently fixed on or adjacent to the compressor isolator indicating that the isolator does not isolate the ancillary equipment. Where the head unit is not connected by plug and socket an independent isolating switch lockable in accordance with shall be installed adjacent to each separately supplied head unit. (This would happen in a body corporate situation where the head units are supplied by the individual tenants.)

129 4.19 AIRCONDITIONING AND HEAT PUMP SYSTEMS Exceptions: 1 The isolating switch may be installed at the switchboard supplying the system if the switchboard is dedicated to the equipment (e.g. an airconditioning plant room). 2 This Clause need not apply to unitary window or through-wall airconditioners, or to heat pump hot water services that are supplied by a plug and socket-outlet installed adjacent to the unit.

130 4.20 Lifts SECTION 4 EQUIPMENT Detailed clause to deal with lifts that are NOT deemed as Safety Services Only lifts deemed as an Emergency lift in accordance with the National Construction Code will be Safety Services. All other lifts will be arranged as general equipment with specific requirements. All Passenger Lifts require an inspection by an LEI as per Electrical Safety Installations Regulations 238(i)

131 Lift supply arrangements A Lift shall be supplied by a dedicated circuit Labelling Lift circuits shall be identified by contrasting colours or other suitable means. eg. WARNING - LIFT CIRCUIT - DO NOT SWITCH OFF Motor Room Less (MRL Lifts) that are installed as emergency lifts shall comply to the additional requirement of Safety Services. The switchboard for a MRL Lift shall not be installed in a lift shaft. A switchboard located remote from the Main Switchboard and dedicated to supplying individual MRL switchboards shall be readily accessible. The protection and control devices (isolators) of an MRL shall be located in a readily accessible position.

132 Section 5 EARTHING ARRANGEMENTS AND EARTHING CONDUCTORS Major changes 5.1 GENERAL 5.3 EARTHING SYSTEM PARTS 5.4 EARTHING OF EQUIPMENT 5.5 EARTHING ARRANGEMENTS 5.6 EQUIPOTENTIAL BONDING 5.7 EARTH FAULT-LOOP IMPEDANCE

133 5.1.3 MEN earthing system NOTES: 1 The MEN system as installed in Australia and New Zealand differs from the IEC system. Both systems are identical in principle but vary in detail. 2 The MEN system and its various parts are illustrated in Figures 5.1 and 5.2. Figure 5.1 shows a general arrangement and Figure 5.2 an alternative arrangement in an owner or user operated supply substation installation. IEC describes the MEN system as a TN-C-S system with the letters signifying

134 General New last paragraph The MEN connection shall be located in an accessible position for disconnection and testing purposes.

135 5.4.6 Structural metalwork including conductive building materials General Structural metal forming the frame of a structure containing an installation or part thereof including shed and other similar structures that are permanently connected to the installation wiring shall be earthed. The size of the earthing conductor used for earthing the frame shall be determined by clause in relation to the cross sectional area of the Active conductor. (remainder of clause unchanged)

136 5.5.3 Particular methods of earthing Outbuildings For Combined Outbuildings each outbuilding shall contain its own individual bonding connection to the conductive frames within that building. All parts of an electrical installation in or on an outbuilding that are required to be earthed in accordance with 5.4 shall be earthed by one of the following methods (a) Individual outbuildings The earthing system in an individual outbuilding shall be either (i) connected to a protective earthing conductor connected in accordance with Clause ; or (ii) connected as a separate MEN installation as describes in Clause

137 Pillar FIGURE 5.4 EXAMPLE OF EARTHING OF AN INDIVIDUAL OUTBUILDING (CLAUSE )

138 (b) Combined outbuildings the earthing system in a combined outbuilding shall be connected to a protective earthing conductor, connected in accordance with Clause , and shall not be connected as a separate MEN installation and shall be earthed using a submain earth complying with clause Clause Outbuilding Combined Two or more structures, installed on the same foundation, or sharing conductive metal roofing or conductive metal frames, with more than one electrical supply, and each separated by an area of land from another structure that contains the switchboard from which those electrical supplies are obtained

139 FIGURE 5.5 EXAMPLE OF EARTHING OF COMBINED OUTBUILDINGS (CLAUSE )

140 5.5.3 Particular methods of earthing Outbuildings (c) Separate MEN installation The earthing system in a separate MEN installation shall be connected to the submain neutral conductor supplying the outbuilding. In this case, the submain neutral conductor supplying the outbuilding is a combined protective earthing and neutral (PEN) conductor. The electrical installation in the outbuilding shall be regarded as a separate electrical installation, and shall be earthed in accordance with other relevant Clauses of this Standard and with the following requirements:

141 Unprotected consumer mains NOTE: Short-circuit of an unprotected active conductor to a switchboard surround, riser bracket, etc. will cause the earthing conductor to carry the maximum fault current available through those consumer mains.

142

143 Bonding of Showers and bathrooms (Paragraph 1 & 2 remain unchanged) Paragraph 3 For combined outbuildings, where each outbuilding contains such showers or bathrooms (a) each outbuilding shall contain its own individual bonding connection to the conductive reinforcing within that outbuilding; or

144

145 (b) providing that the reinforcement is electrically continuous across the whole of the combined outbuildings (refer to Note 3), (one bonding conductor connecting the reinforcement to the earth bar or link of the switchboard that supplies all of the combined outbuildings is satisfactory).

146

147 Clause Swimming and Spa Pools Clause Bonding arrangement (was ) Clause Conductive Pool Structure (was ) Clause Equipotential bonding conductor connection point (was ) Clause Electrical Equipment (was ) Clause Conductive Fixture and Fittings (was )

148 Conductive pool structures Where the pool structure is conductive, all extraneous conductive parts, including the reinforcing metal of the pool shell or deck, shall be connected to a pool equipotential bonding conductor connection point complying with Clause The connection point shall also be bonded to the earthing conductors associated with each circuit supplying the pool or spa, or the earthing bar at the switchboard at which the circuits originate. NOTE: Fixed conductive parts Where the pool structure is and conductive, fittings that the connection are not part point of shall be installed and bonded to the installation earthing electrical system equipment regardless and of that other requirements specified in Clauses are and not more than 100 mm in any dimension need not be Exception: This requirement need not apply where bonded. the reinforcing metal of the pool shell or deck is electrically continuous to the reinforcing metal within the concrete floor of the electrical installation, and that reinforcing metal has been bonded to the earthing system of the electrical installation as required in Clause Notes remain unchanged

149 Pool equipotential bonding conductor connection point An equipotential bonding conductor connection point as required by Clause may be used as a connection point for the bonding arrangements required by Clauses and The connection point shall be (a) located in a position that will be accessible with space for connections to be made after pool construction (for example, located adjacent to the pool equipment); (b) identified by marking of its location on the switchboard at which the circuits supplying the pool or spa originate, or other permanent location; (c) of suitable design and construction in accordance with Clause 3.7; (d) protected against mechanical damage in accordance with Clause ; and (e) protected against corrosion in accordance with Clause

150 Conductive fixtures and fittings Where any items specified in Clauses or are required to be equipotentially bonded, the bonding shall be extended to any fixed conductive material such as pool ladders, diving boards, conductive fences and pipework that are installed within arm s reach of the pool edge, and that are in contact with the general mass of earth. NOTE: Refer to Clause and Figure 1.1 for the zone of arm s reach. Exception: This requirement need not apply to fixed conductive parts and fittings that are not part of electrical equipment and have no individual accessible part greater than 100 mm in any dimension.

151