Legal texts and standards. Fire testing certification. Cable trays, cable ladders & trunkings standards

Transcription

1 1 Legal texts and standards 2 Fire testing certification Cable trays, cable ladders & trunkings standards Low voltage directive n law Dated on 3 rd October 1995 Safety for people, animals and building when using electrical equipment under voltage margin. This directive is an application of the N 73/23/CEE low voltage directive (19th February 1973) which has been modified by the N 93/68/CEE directive(22th July 1993 amendment) TOLMEGA products in compliance with the DIN DIN After being checked, cable trays, supports and cables are put in a 1000 temperature ambiance during 30, 60 or 90 minutes. Tests centre : I.B.M.B - Braunschweig Certified E configurations : N 89/336/CEE Directive - Dated on 3rd May 1999 European agreement about electromagnetic compatibility IEC standard dated on September 2001 Cable trays & cable ladders for electric installations : -cable trays, cable ladders, hanging system load tests conditions. -Marking and documentation IEC &2 standard Channels and duct systems for electrical installations NEMA Standards Publication VE : Metal Cable tray systems ANSI / NFPA 70 (2002) National electrical code (NEC) DIN standard Cable trays & support system fire resistance. BST60 cable trays -100 up to 500 mm width Span 1,20 m -Load 10 kg/m. Hercule cable ladder up to 400 mm Width-span 1,20 m - Load 20 kg/m. 1-4

2 3 The products are designed and manufactured to the highest world standards The low voltage European Directive specifies that electrical material must be safe for people, animal and goods (cf. A) To be in compliance with the Directive, the manufacturer must: manage a quality control of manufacturing process provide every product with a conformity certificate provide administration with a technical documentation show the compliance by the marking.(cf. B) Products under IEC Standard are in compliance with the requirements of the European directive. This standard specifies the requirements for : - intallation (cf. C) - load testing (cf. D) - classification (cf. E) marking, dimensions... A - Safety conditions Fire reaction The TOLMEGA metallic products are MO fire reaction certified. Electrical continuity To IEC standard TOLMEGA products meet electric continuity requirements: résistance 5 milliohm/m without couplers résistance 50 milliohm with splice plates. To NEMA VE cable trays systems shall be joined with connections means meeting the requirement of clause 5.1: Net résistance of the connection Ohm or 2x600 urm sample/30 Adc Electrical continuity tests to IEC standard Tests sample sections: 50 x 150 mm. Measure characteristics : Voltage = 5V Frequency = 50 Hz Résults : all links have a resistance 50 milliohm as required by the IEC standard. (Lille University laboratory) In addition to IEC Standard, all products are tested on request to NEMA VE standard METAL CABLE TRAYS SYSTEMS Difference to IEC: this standard mentions requirements for - corrosion protection (see page 15-16) - and grounding function (see A) TOLMEGA cable trays products are load tested to residual deflection (see page 8) Product information is provided including the rated load/span and information on SS or Aluminium Alloy if applicable. Bolting junction between 2 steel wire cable trays (200 mm length) T-SCOPIC bolted junction (360 mm length) Bolting junction between 2 ventilated cable trays (160 mm length) R liaison (mohm) 1,13 0,98 0,90 Bolting junction between trunkings (150 mm length) 0,84 1-5

3 B - Marking in compliance with the IEC standard Low Voltage Directive - Law N (art. 8) The CE marking is the symbol defined on annex of this law; it is marked on the electrical material or packaging, tice, or guarantee... CEI (Extrait 7.1) Each system component shall be durably and legibly marked with - the manufacturer s or responsible vendor s name or trade mark or identification mark - a product identification mark which may be, for example, a catalogue number, a symbol or equivalent. When system components except cable trays land cable ladder are packaged, the product identification mark may be, as an alternative, marked on the package. Compliance is checked by inspection. For the product marking, compliance is also checked by rubbing by hand during 15s with a piece of damp cotton cloth and again during 15s with a piece of cotton cloth soaked with petroleum spirit. C - Assembly instructions No junction on end spans Others spans: any location for the junctions. No junction Any location of the junction No junction For width > 200 mm, we recommend to fit a junction on the bottom of the cable trays. As an evidence of their compliance to standards, TOLMEGA cable trays and cable ladders are marked. For a better identification, the product code, size and finish is written in addition of the marking if applicable. For 2 m span, T-SCOPIC range, we recommend L/5 junction (400 mm to support). 400 (L/5) 400 (L/5) 40 2 m 2 m 2 m 2 m 2 m TOLMEGA identification mark On cable trays or n-packaged accessories : indelible mark inked or engraved. On all packaged accessories*: marked on the product. * some packaged accessories can be also marked one by one 1-6

4 600?max D - Recommended supports location Small widths of horizontal or vertical bends ( 300 mm), plan 2 brackets located at the entry and the end of the bend. Large widths of horizontal or vertical bends( 300 mm) plan 3 brackets at the entry, the middle and the end of the bend. large width large width 600?max 300 maxi ( large) AF /3 radius 30,45,60 flat bends (small) 400 maxi 400 maxi AF maxi AF maxi 300 maxi (small) 600 maxi (large) 2/3 radius 300 maxi (small) 600 maxi (large) 2/3 radius 300 maxi (small) 600 maxi (large) 600 maxi 400 maxi 400 maxi 600 maxi 1-7

5 E - Load testing 1) Cable tray to IEC standard All TOLMEGA products are tested according to type 2 - Cable trays fixed onto supports - Uniformly distributed load - Deflection is measured at 3 points along the line midway between the supports and at right angles to the center of the tray. The 3 points measurements shall be under each edges or side beam and under the center. Load test -span pitch: 500 mm -Safe working load (SWL) is determined according to type 2 test instructions. Results are selected according to : - the L/100 maximum deflection. - the 1.7 safety factor on the resistance while breaking. Usually deflection is < L/300 for cable trays and L/200 for wire mesh cable trays. Transversal deflection < L/20 for both cable trays and wire cable trays. For width > 200 mm, we recommend to fit a junction on the bottom of the cable trays. L/2 Junction L A/B L 0,4L Tests are achieved with an L (or X) end span, an L middle span and a 0.4 L cantilever. SWL Safe Working Load / Span In compliance with the IEC standard, the manufacturer can select the load test type. Type I Manufacturer s specifications Junctions are located anywhere on the routing Comment This test includes an end span junction. However, a routing start with usual 3 m length conventional cable trays, so there is never end span junction on site. This is an useless requirement. Results SWL are inferior to the selected test. Type II Type III There must t have any junction on the end span Span must be equivalent or multiple to the standard length product and the junction location is specified. This is the usual application. There is never end span junction on site. This is the TOLMEGA selected test. This is an unusual on-site configuration, except for T-SCOPIC 4 m length cable trays in a 2 m span configuration: we recommend a L/5 junction: 400 mm to support for an easier installation. For conventional 3 m length cable trays, the manufacturer requires the installer to assemble the junctions on a 1,5 or 3 m span. This is t convenient on site at all, but the results are profitable. Type IV Weak parts location onto the cable tray Specific products Type V Span > 4 m Special cable ladders heavy duty applications TOLMEGA selected test (50x150 mm steel wire cable trays and cable trays on span support 1,5 m). SWL are superior to the selected test : profitable results. SWL Safe Working Load / Supports The IEC standard specifies that the SWL is the load limited by : The L/20 maximum deflection at the end of the bracket The 1.7 safety factor. SWL values : dan ( brackets) dan.m ( hanging systems) Bends /Supports L/ L 2) Cable tray to Nema VE All cable trays are subjected to loading to residual deflection (Method B) - Single beam span with free unrestrained ends - Uniformly distributed load - Vertical deflection measured on 3 points along the midway between the supports and the 3 points of measurement shall be under each side rail and at the centre of the tray. Load application - The residual deflection is measured according to and Sections after loading until the minimum test load minimum test load = 1,5 x L x w where 1,5 = safety factor L = span length (m) w = rated load (kg/m) - Historical load/span class designation. Span (m) Load 2,4 3 3,7 4,9 6 (kg/m) A 8B 8C C D E 12A 12B 12C 16A 16B 16C D 20A 20B 20C

6 4 Tolmega assembly instructions for installation in compliance with standard A - Cabling and EMC mechanical Today, buildings need data network cable management system. Equipment must be reliable and versatile. Cable management must be in compliance with type 5 and type 6 data cable application. TOLMEGA provides cabling support and supplies high EMC products solutions. In case of electromagnetic external pollution, height of cable tray > height of cables. Exposed area EMC recommandations Separate power and data cables, by using cable trays or dividers. Field Protected areas 30 cm mini Communication cables Data cables Metallic parts of framing can increase the EMC performances : TOLMEGA provides framework fasteners and specific products. distance betwwen power cables and data cables Distance between power cables and data cables > 30 cm. If cables should be crossed, use a 90 angle. recommended passable t recommended 90 Cable must be correctly fastened without cable ties extra pressure - Data cables must t be pulled but unrolled - Radius: mini 1 - Do t twist it. - Do t use it as a walkway. If power and data cables are set into the same cable tray or trunking don t use cover. Cover and permanent RS clip Divider t recommended passable 1-9

7 B - Cable fastening TOLMEGA products insure a continuous cable support system (CEI 61537). NOTICE. Basket trays : If data cables are t correctly fixed, the result can be a deformation on every transversal wire mesh, 100 mm to 100 mm. Of course, this distortion is bad for the signal quality. We recommend to unroll cables instead of pulling it, do twist and do t overload. D - Electrical continuity In some countries, metallic cable trays cant be used as earthing or equipotential conductor. However, it is recommended to earth the cabletray to the ground of the installation. Forbidden Possible Recommended Direct wall fixing or horizontal wall fixing : Cables must t being damaged by their own weight. Between 2 cable ties, the minimum span is : > 0,4 m (conventional cables) > 0.75 m (screened cables). Horizontal or wall fixing applications : cable ties must be used for power cable (ejection risk in case of short-circuit) Insulated or n insulated mo conductors are t allowed in cable trays. Cable fixings on cable tray 0,75m screened cables 0,40 m conventional cables Horizontal or direct wall fixing TOLMEGA connecting units, bolted connectors and clip-on connectors are in compliance with IEC in n-corrosive conditions. AUTOMATE Armoire métallique (TRP) Raccordement des chemins de câbles par liaison boulonnée Raccordement des masses C - Equipotentiality Connect cable trays to the ground of the installation in order to increase equipotentiality. Pre-spliced cable trays In case of screened cables, connect carefully the end of the cable tray to the ground of the metallic board and connect the screen to the ground of the equipment. board bolting connections earthing Connect cable trays to the ground of the installation each 15 m. If the length of the routing < 15 m, connect the end of cable tray to the ground of the installation. Use TOLMEGA S earthing fasteners. E - Earthing As a matter of safety, it is recommended to earth the metallic cable trays. In case of a short circuit, the protection can be : An Automatic switch off of the power supply. An Electrical separation A Low voltage circuit breaker. bolting connections earthing 1-10

8 5 Electromagnetic Compatibility (EMC) A - Definition Electromagnetic compatibility : Capacity of an appliance or a system to work correctly in its electromagnetic environment without producing electromagnetic pollution. Earthing: Earth : earth ground, OV potential reference. Earth plug: Conductor in direct contact with earth. Earthing and grounding must be separated: Earth network is connected to ensure the people protection. Grounding is active against electromagnetic influence. On site, these 2 networks are connected. This multiple link solves the problem of high impedance of the HF (high frequency) earth conductor. B - Level of electromagnetic pollution Products in compliance with IEC standard are, in current use, passive against electromagnetic influences. (emission & immunity). The different levels of disturbance are defined : Level of disturbance immunity level compatibility level emission level Level supported by an appliance or a system without dysfunction Maximum level expected by a specific environment Maximum emission wich a material must t exceed C - ucing effects of cable trays 2 types of reducing effects of cable trays : By grounding, the cable trays achieve a better equipotentiality of the installation. The currents created by field influences in cable trays are cleared. Grounding connection reduces disturbance by generation of a reversed field. D - EMC characterisation There are two different ways to characterise the products : Characterisation of the reduction of the radiation (db) according to the frequency. Characterisation of the transfer impedance (Ohm) according to the frequency. a) The first characterisation is t recommended : There is standard test report method about cable trays. ucing radiation effect depends on reference, but EMC references are t stable (according to connections, installation conditions, environment conditions, ) So, results are t repetitive. They depend on test methods and conditions. It could be dangerous to extrapolate on site the reduction of radiation measured in insulated room. b) Characterisation by transfer impedance is the way used by laboratories and cable manufacturers : impedance is a intrinsic parameter of the cable trays, apart from conditions of use. Measurement method is well kwn, repetitive and suitable. TOLMEGA uses this characterisation method. The lowest transfer impedance level is the highest reducing effect of cable trays. 1-11

9 E - EMC results Cable trays type comparison Cover influence Ω 10 W ,1 0,1 0,01 0,01 0,001 0,01 0, Mhz Source : Lille University 0,001 0,01 0,1 Source : Lille University Mhz Solid cable tray Ventilated cable tray Basket tray Solid cable tray with cover Perforated cable tray with cover Solid cable tray without cover Perforated cable tray without cover Junction type influence W 10 Thickness influence W ,1 0,1 0,01 0,01 0,001 0,01 Source : Lille University 0, Mhz 0,001 0,01 0, Mhz Source : Lille University Thickness 1,25 Thickness 0,75 T-SCOPIC junction Bolted junction Clip-on junction 1-12

10 6 Materials and finishes A - Selection table Hot-dip mill Electro-zinc Continuous Hot Dip Coating GEOMET Alluminium Stainless steel Galvanised galvanising pre-galvanised Galvanized on EZ passivated alloy (V2A) wire after Steel sheet fabrication small strips EN AW 5754 grade shaped zinc X2CrNi18-9 G EZ PG HDG ZINC + GM AG3 304 L STANDARDS EN EN EN EN ISO 1461 EN 573 EN BS 2989 EN BS 729 EN 485 AISI 304L ENVIRONMENT ASTM B633 ASTM B 209 DIN ASTM A 653 NFA ASTM A 123 ASTM B 275 ASTM A380 INDOOR OUTDOOR - URBAN OUTDOOR - INDUSTRIAL OUTDOOR - MARINE MINERAL ACID ORGANIC ACID BASES HALOGENS OIL & GAS FOOD INDUSTRY RECOMMENDED POSSIBLE B - Description ZINC ON STEEL COATING G : HOT-DIP MILL GALVANIZED STEEL SHEET (EN 10327/ ASTM A653 / BS 2989) The galvanized steel sheet is obtained by immersing a previously-treated steel sheet in a bath of molten zinc at C. The current grade of Z 275 NA is of a thickness of µ per face, or 275 g/m2 per double face, rmal zinc formation N, finishing grade A. Contrary to wide-spread belief, corrosion is possible in sections of the metal when a galvanized metal sheet of current thickness is sheared or stamped. Iron is protected through the battery phemen consisting of the Iron-ZINC ELECTROLYTIC system. HDG : HOT-DIP GALVANIZED AFTER FABRICATION (EN ISO 1461/ ASTM A123M / BS 729) After a surface treatment, the steel is immersed in a bath of molten zinc. This gives a zinc thickness ranging from 49 to 70 µ depending on the thickness of the metal sheet. thickness mm 3<e<6 1,5<e<3 e<1,5 ISO 1461 Zinc thickness (HDG) mini thickness of zinc µ medium thickness of zinc µ ZINC + : COATING ON EZ This special zinc protection process allows a better corrosion resistance than hot-dip galvanization (saline spray test ISO 9227: 1500 hours). Appearance : silk finish. No droplets after drying. EZ : ELECTRO-ZINC GALVANISING (EN EN NFA 91472/ ASTM B 633) Electrolytically, a zinc coating is deposited on the steel. The baths used consist of acid alkali solutions of zinc salts. The ades are in zinc (generally to % of purity) and the parts to coat, previously degreased and cleaned, are connected to the cathode. After galvanizing, the parts are chromed to increase the protection. Stainless steel (V4A) grade X2CrNiMo L EN AISI 316L ASTM A380 DIN PG : CONTINUOUS HOT-DIP GALVANISED WIRE (EN ) The wire is continuous hot dip galvanized (220 g of zinc/m2). Then a wire drawing is processed in addition. For UNIFIL products, this is a very ecomic and high corrosion resistance proceeding. GEOMET passivated small strips shaped zinc : COATING Epoxy Polyester ASTM B633 Geomet components are made up of either passivated small strips shaped zinc and aluminium into a mineral binder, or passivated small strips shaped zinc and nickel.this structural passivation allows a better corrosion resistance than hot-dip galvanization (saline spray test ISO 9227: 1000 hours). ZINC LOSSES TROUGH CORROSION (TO ISO 14713) : Industrial environment : 0,7-2 µ / year Urban environment : 0,7-2 µ / year Sea environment : 4-8 µ / year Rural environment : 0,1-0,7 µ / year WHITE RUST Under what conditions do white rust appears? A fast oxidization is needed, either under a heterogeneous film of water, or under permanent condensation (for example by differential aeration). This fast oxidization can be local or general. It is the precipitation of basic salts of zinc Zn (OH) 2. These basics salts are powdery, t very adherent and provide protection. However, they quickly combine with components of the surrounding air to form a protective layer of basic zinc carbonate. The basic salts formed are t very soluble in water and they accumulate in the surface patina until reaching a state of balance between their elimination in the form of soluble salts and their generation by oxidisation of the metal. rust has effect on zinc coating lifetime. 1-13

11 OTHERS MATERIALS 304 L : STAINLESS STEEL X2CrMi (EN / AISI 304L) Good resistance to corrosion in natural and food atmospheres. 316 L : STAINLESS STEEL X2CrMiMo (EN / AISI 304L) Especially intended for the chemical and food environments, and surface treatment. Except by written agreement, all products supplied Tolmega for stainless steel equipment always mean: - Not trimmed- Not degreased- Not cleaned, decontaminated or passivated. We can perform complementary treatment of decontamination / passivation on request. AG3 : ALUMINIUM ALLOY 5754 (EN 573- NF EN 485 / ASTM B275 - ASTM B209) As for the stainless steels, AG3 is protected from exterior corrosion by a passive layer of alumina, which is naturally formed in the air. Its resistance to corrosion is very good in neutral environments (4<pH<10) and also marine atmospheres. On the other hand, it is very sensitive to electrolytic corrosion. The complementary treatment of adisation reinforces the thickness of the passive layer of aluminia. This treatment can be applied on request.(4<ph<10) and also marine atmospheres. On the other hand, it is very sensitive to electrolytic corrosion. The complementary treatment of adisation reinforces the thickness of the passive layer of aluminia. This treatment can be applied on request Joined metal Metal Source : NFE Stainless steel 18-9 Silver, Ag Mercury, Hg Unit : mv Do t exceed ~ 300 mv. OTHERS COATINGS Stainless steel Silver Mercury Nickel Cu-Zn-Ni Alloy Copper Cuproaluminium Cu-Zn Alloy (Brass) Cu-Sn Alloy ( Bronze) Tin Lead Fe-Ni Alloy Al-Cu Alloy Cast iron Steel Steel Alloy for bolt Steel Alloy for cast Nickel Cu-Zn-Ni Alloy Copper Cuproaluminium Aluminium Steel for temyer Al-Mg Alloy Cadmium Iron Al-Mg-Si Alloy Chrom Al-Zn-Mg Alloy Sn, Zn Alloy Zinc Cu-Zn Alloy (Brass) Cu-Sn Alloy (Bronze) Tin Lead EPOXY OR POLYESTER COLOURED COATINGS These coatings are generally applied on continuous galvanised steel sheet (SZ) - For greater protection, it is recommended to select a hot-dip galvanised (HDG) finish. - For aesthetic requirements and inside buildings, an epoxy coating can be applied on mild steel XC or SZ finish. - Outside applications : Polyester - Inside applications : Epoxy Benefits : - Save maintenance time by coloured location of the networks. - Provides a high corrosion protection, especially in severe environments. This two-way zinc+ coloured coating protection is the only process where the added corrosion protection properties provides more than the double of corrosion protection given separately. Characteristics : The coating is applied by electrostatic gun-spray then stove hardened. The heat-hardening powders offer good resistance to abrasion and shock, excellent lifetime value and requires maintenance. Colours : Specify the RAL reference. Fe-Ni Alloy B - Electrolytic corrosion Electrolytic corrosion is defined as a process of accelerated corrosion resulting of an electric current between two metals coupled in an electrolytic environment. Below the red line, the metal is being attacked. The joined metal undergoes galvanic corrosion but, on the contrary, enjoys an effect of galvanic protection. Electrolytic corrosion is very important when choosing the assembly bolts and certain accessories different from the cableway support. (See table) Tray finish Zinc on steel coating Other coatings (epoxy, polyester...) Stainless Steel (SS) Aluminium Al-Cu Alloy Cast iron Steel Steel Alloy for bolt Steel Alloy for cast Aluminium Steel for temyer Al-Mg Alloy Bolting finish EZ, GEOMET EZ, SS, ALU SS Aluminium * * Sometimes EZ or SS bolting is used. If EZ bolting, bolts and nuts will be corroded in some years. If SS bolting, cable trays will be corroded. Bolts and nuts can be removed in this case. This effect will be increased in outdoor applications Cadmium Iron Al-Mg-Si Alloy Chrom Al-Zn-Mg Alloy Sn, Zn Alloy Zinc

12 D - ISO 9227 Saline spray tests SS 316 L grade (after decontamination & passivation operation) SS 316 L grade (without decontamination & passivation operation) ALUMINIUM HDG HOT-DIP GALVANISED STEEL SHEET SZ CONTINUOUS HOT DIP GALVANIZED STEEL SHEET SZ CONTINUOUS HOT DIP GALVANIZED STEEL SHEET + EPOXY COATING 60 up to 80 µm HDG HOT-DIP GALVANISED STEEL SHEET + EPOXY COATING 60 up to 80 µm ZINC + Corrosion 24 H 168 H 240 H 504 H 744 H 984 H 1224 H 1512 H start (1) stabilization 100% of the sample surface 100% of the sample surface start (1) light 1% up to 2% (1) start (1) start (1) 100% 5 up to 10% of the surface 100% 50% dof the surface light separation of coating 5% of the surf. 5% of the surface (1) - The beginning of the corrosion is located on cut offs. (2) - The separation of the coating is located close up to the oblong holes. This is due to an acid cleaning operation achieved before coating Tests achieved on a BS 48 :147 sample rust : effect on the lifetime coality rust : active corrosion E - Class designation 1) According to IEC 1537 Range (G and HDG) T-SCOPIC BS UNIFIL SR HERCULE ATLAS Material Fire Propagation Electric continuity Electric Finishes Temperature Perforation* Shock resistance (J) Metal Metal Metal Metal Metal Metal Non Non Non Non Non Non Continuity Continuity Continuity Continuity Continuity Continuity Conductor Conductor Conductor Conductor Conductor Conductor Metallic coating -20 C up to +60 C Metallic coating -20 C up to +60 C Metallic coating -20 C up to +60 C Metallic coating -20 C up to +60 C Metallic coating -20 C up to +60 C Metallic coating -20 C up to +60 C C C D Z Z Z * Open-area of perforated cable trays (C >15% up to 30% - D >30%) Open-area of cable ladders (Z >90%) 1-15

13 2) According to NEMA VE Typicals dimensions Widths* Lengths of straight sections* Depths Widths mm Cable trays Basket trays Products Cable Ladders Lengths m Type Cable trays - Basket trays Cable trays Cable Ladders * Others dimensions on request : - Nominal rung spacing (cable ladders) : 300 mm. Other on request. - Inside radius for bends : 150, 200, 500, 600 mm. Other on request. - Degrees of Arc for elbows : 45, 90. Other on request. Range BS - UNIFIL T - SCOPIC SR - HERCULE - ATLAS Depths Cable trays Basket trays Products Cable Ladders Historical load / Span class designation Load (kg/m) ,4 3 3,7 4,9 6 8A 8B 8C C D E Span (m) 12A 12B 12C 16A 16B 16C D 20A 20B 20C F - RoHS / WEEE Environmental protection RoHS : Restriction of use of certain hazardous Substances (European Directive 2002/95/EC) All TOLMEGA products don t contain any substances marked out by the directive. WEEE : Waste Electrical and Electronic Equipments (European directive 2002/96/CE). This directive is t applicable to TOLMEGA products. 1-16