ANY SPECIFICATION DRAWINGS OR DATED PRIOR TO SEPTEMBER 2015 WILL NOT BE HONORED.

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1 November 30, 2015 Dear STEMC Member and Contractors, Over the years, STEMC has made many changes to its member requirements for new services and specifications associated with those requirements. As a matter of consistency for members and contractors, STEMC has compiled and revised several drawings used to aid members and their contractors installing facilities for new services. ANY SPECIFICATION DRAWINGS OR DATED PRIOR TO SEPTEMBER 2015 WILL NOT BE HONORED. In conjunction with this, STEMC has updated several OPERATIONAL PROCEDURES in an effort to bring STEMC more inline with other utility best practices. These revisions mutually benefit STEMC and the member. OPERATING PROCEDURES WILL BECOME EFFECTIVE JANUARY 1, If you have any questions regarding the changes, please contact myself or your local STEMC Engineering Coordinator. Kind regards, William V. Gordon, P.E. Vice President of Engineering P.O. Box East Main Street Brownsville, TN (office) (fax)

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5 ALL SERVICES SHALL MEET NATIONAL ELECTRICAL CODE STANDARDS. SERVICE ENTRANCE CONDUCTORS SHALL EXTEND 18" FROM WEATHERHEAD WITH NEUTRAL MARKED IN WHITE. EXIT CONDUIT LAYOUT WILL VARY BASED ON MEMBER NEEDS. 5/8" x 8' GROUND ROD BONDED TO GROUND WIRE WITH CLAMP INSTALLED BELOW GRADE. 3000PSI CONCRETE WITH MINIMUM 48 HOUR CURE TIME PRIOR TO CONNECTION. 1. OBTAIN ALL PERMITS AND APPROVAL FOR POLE LOCATION AND HEIGHT FROM STEMC ENGINEERING PRIOR TO COMMENCING WORK ' POLE WITH 6" MINIMUM DIAMETER SHALL BE BURIED 5' BELOW GROUND LEVEL. ANY POLE HEIGHT OTHER THAN 20' MUST BE APPROVED BY STEMC ENGINEERING. 3. CONCRETE SHALL BE PLACED AROUND POLE, VISIBLE AT GROUND LEVEL, AND CURED 48 HOURS. 4. GUY AND ANCHOR SHALL BE SET IF SERVICE LENGTH IS GREATER THAN 100', OR AS REQUIRED BY STEMC ENGINEERING. 5. CLEARANCE TO DRIP LOOP SHALL BE A MINIMUM OF 12' ABOVE GROUND LEVEL. IF SERVICE CROSSES DRIVEWAYS OR PUBLIC STREETS MINIMUM CLEARANCE COULD BE EXTENDED UP TO 18'. 6. SERVICE WIRE CROSSING A ROOF SHALL HAVE MINIMUM CLEARANCE OF 8' WHERE CROSSING. 7. STEMC PROVIDED EYEBOLT SHALL BE INSTALLED 6" FROM TOP OF POLE. MEMBER OWNED SERVICE POLE SPEC M7.1G (SVC POLE)

6 STEMC PRIMARY CONTRACTOR TO LEAVE 6 FT. OF SECONDARY (MINIMUM) FOR STEMC CONNECTION TO THE TRANSFORMER TELEPHONE OR CABLE TV COORDINATE FINAL INSTALL WITH STEMC. OBSERVE APPLICABLE OSHA MINIMUM APPROACH STANDARDS AT ALL TIMES. CONDUIT TO CONFORM TO LATEST NESC AND NEC REQUIREMENTS. SECTION AA' STANDOFF BRACKETS, MACHINE BOLTS, WASHERS,LOCK NUTS, AND LAG SCREWS PROVIDED BY CONTRACTOR (NOT REQUIRED IF SINGLE CONDUIT IS INSTALLED). FINAL WARNING TAPE GRADE CLEAN FILL A' 3" CONDUIT QTY DETERMINED BY MEMBERS NEEDS A 1. ALL CONDUIT ABOVE FINAL GRADE TO BE PVC (SCHEDULE 80 OR RIGID STEEL). 2. ALL CONDUIT BELOW FINAL GRADE TO BE PVC OR HDPE (SCHEDULE 40 OR 80) 3. BACKFILL WITH CLEAN NATIVE EARTH AND MACHINE TAMP. TRENCH AND RISER DETAIL FOR MEMBER OWNED UNDERGROUND SECONDARY M7.2G (TDSEC)

7 STANDOFF BRACKET, MACHINE BOLT, WASHER, LOCK NUT, AND LAG SCREW PROVIDED BY STEMC (NOT PROVIDED IF A SINGLE CONDUIT IS INSTALLED). A' SECTION AA' FINAL GRADE WARNING TAPE CLEAN FILL A (3) 2" CONDUIT 1. TRENCH SHALL BE INSPECTED BY STEMC ENGINEERING BEFORE BACKFILLING. 2. BACKFILL WITH CLEAN NATIVE EARTH AND MACHINE TAMP. 3. INSTALL STRING IN CONDUIT AND COVER ENDS TO KEEP OUT WATER. 4. SCHEDULE 80 PVC CONDUIT SHALL EXTEND 10 FEET ABOVE FINAL GRADE, UNLESS POINT OF FEED IS AN UNDERGROUND DEVICE. 5. CONDUIT BELOW FINAL GRADE SHALL BE PVC OR HDPE (SCHEDULE 40 OR 80) 6. MINIMUM 36 INCH SWEEPING ELBOWS SHALL BE USED. RIGID ELBOWS MAY BE REQUIRED, AS DETERMINED BY STEMC ENGINEERING. TRENCH AND RISER DETAIL FOR 1Ø / 3Ø PRIMARY CONDUIT INSTALLATION M7.5G (TRD)

8 3 4 " CHAMFER #4 REBAR 8' GROUND ROD A 3" SECONDARY 2" PRIMARY A' FRONT OF PAD FINAL GRADE SECTION AA' 1. PAD SHALL BE INSPECTED BY STEMC ENGINEERING BEFORE POURING CONCRETE. 2. GROUND BENEATH THE TRANSFORMER SHALL BE LEVELED AND THOROUGHLY COMPACTED. 3. THE PRIMARY AND SECONDARY WIRE SHALL BE POSITIONED AS SHOWN IN THE DRAWING. 4. INSTALL 5/8"GROUND ROD AS INDICATED. 5. BOND # 4 SOLID COPPER TO REBAR AND GROUND ROD. 6. FIBER REINFORCEMENT CAN BE USED IN LIEU OF REBAR. 7. THE CONCRETE MINIMUM 28 DAY COMPRESSIVE STRENGTH SHALL BE 2500 PSI. 8. INSTALL STRING IN PRIMARY CONDUIT AND COVER ENDS TO KEEP OUT WATER. CONCRETE PAD DETAIL FOR 1Ø TRANSFORMER M8.1G (PM 1P)

9 #4 REBAR GROUND ROD (NOTE 3) 3 4 " CHAMFER SERVICE CONDUITS (NOTE 2) A A' FRONT OF PAD NOT TO EXCEED 18" 4" MAXIMUM HEIGHT ON ANY CONDUIT PRIMARY CONDUITS SECONDARY CONDUITS FINAL GRADE 8 FT. GROUND ROD SECTION AA' 1. PAD SHALL BE INSPECTED BY STEMC ENGINEERING BEFORE POURING CONCRETE. 2. GROUND BENEATH THE TRANSFORMER SHALL BE LEVELED AND THOROUGHLY COMPACTED. 3. THE PRIMARY AND SECONDARY WIRE SHALL BE POSITIONED AS SHOWN IN THE DRAWING. 4. INSTALL 5/8"GROUND ROD AS INDICATED. 5. BOND # 4 SOLID COPPER TO REBAR AND GROUND ROD. 6. FIBER REINFORCEMENT CAN BE USED IN LIEU OF REBAR. 7. THE CONCRETE MINIMUM 28 DAY COMPRESSIVE STRENGTH SHALL BE 2500 PSI. 8. INSTALL STRING IN PRIMARY CONDUIT AND COVER ENDS TO KEEP OUT WATER. CONCRETE PAD DETAIL FOR 75 kva 500 kva 3Ø TRANSFORMER M8.3G (PM 75500)

10 GROUND ROD (NOTE: 3) #4 REBAR ON 18" CENTERS 3 4 " CHAMFER A SERVICE CONDUITS (NOTE:2) A' FRONT OF PAD 4" MAXIMUM HEIGHT ON ANY CONDUIT PRIMARY CONDUITS SECONDARY CONDUITS FINAL GRADE 8 FT. GROUND ROD SECTION AA' 1. PAD SHALL BE INSPECTED BY STEMC ENGINEERING BEFORE POURING CONCRETE. 2. GROUND BENEATH THE TRANSFORMER SHALL BE LEVELED AND THOROUGHLY COMPACTED. 3. SERVICE CONDUIT POSITIONS ARE NUMBERED ACCORDING TO LOCATION PREFERENCE. 4. THREE 5/8" X 8' COPPER GROUND RODS (COPPERWELD OR EQUAL) SHALL BE INSTALLED; ONE IN PRIMARY COMPARTMENT OF TRANSFORMER, AND TWO ON THE BACK SIDE OF THE TRANSFORMER PAD. A #4 COPPER WIRE SHALL BE INSTALLED BETWEEN GROUND RODS AND ATTACHED TO EACH GROUND ROD WITH A GROUND ROD CLAMP. 5. BOND #4 SOLID COPPER TO REBAR AND GROUND ROD " PRIMARY CONDUIT TO HAVE MIN. 36" RADIUS ELBOWS AND TO BE EXTENDED BEYOND EDGE OF PAD IN DIRECTION INDICATED BY ENGINEERING. RIGID ELBOWS MAY BE REQUIRED, AS DETERMINED BY STEMC ENGINEERING. 7. THE CONCRETE MINIMUM 28 DAY COMPRESSIVE STRENGTH SHALL BE 2500 PSI. 8. INSTALL STRING IN PRIMARY CONDUIT AND COVER ENDS TO KEEP OUT WATER. CONCRETE PAD DETAIL FOR 750 kva 2500 kva 3Ø TRANSFORMER M8.4G (PM 1500)

11 POSSIBLE ADDITIONAL BOLLARD LOCATIONS (AS REQUIRED BY STEMC) FRONT OF PAD A A' REQUIRED BOLLARDS BOLLARD LOCATION 4" DIA. STEEL POST FILLED WITH CONCRETE BACKFILL HOLE WITH CONCRETE SECTION AA' PROTECTIVE BOLLARD DETAIL M8.7G (PBD)

12 20' Fuel Tank 15' Pool 10' Doorway 10' Fire Escape 10' Building (Combustable) 6' Water Hydrant 4' Building (NonCombustable) 4' Landscaping 4' Gas Meter 1. CLEARANCES FROM PADMOUNT TRANSFORMER TO STRUCTURES ARE MEASURED FROM THE NEAREST METAL PORTION OF THE TRANSFORMER TO THE STRUCTURE OR ANY OVERHANG. 2. CLEARANCE IS 4 FEET FROM THE EAVES OF A BUILDING WITH NONCOMBUSTABLE WALLS (BRICK, CONCRETE, STEEL, OR STONE), OR 10 FEET FROM THE EAVES OF A BUILDING WITH COMBUSTIBLE WALLS (INCLUDING STUCCO). PADMOUNT TRANSFORMER CLEARANCES M9.1G (PMC1)

13 BUILDING 4' MIN. TRANSFORMER PAD OBSTRUCTION 4' MIN. 4' MIN OBSTRUCTION PRIMARY SECONDARY FRONT OF PAD 8' MIN. X X X X X X X FENCES OR OTHER OBSTACLES 1. THESE CLEARANCES ARE STEMC MINIMUMS. GREATER CLEARANCES MAY BE REQUIRED BY CODES, DUE TO BUILDING CONSTRUCTION, TYPE OF OPERATION, LOCATION OF DOORS AND WINDOWS, ETC. CHECK WITH ELECTRICAL INSPECTION AUTHORITY HAVING JURISDICTION. CLEARANCE SPECIFICATIONS FOR PAD MOUNTED TRANSFORMER M9.2G (PMC2)