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Updated May 2017


8.1 Commercial Metering – 200 Amps and Less (Socket Style)

One of the most important parts of your construction is correctly installing the meter so that it will accurately measure the amount of electricity you use.

The following metering information is for commercial applications. If you are installing a different electrical service, please see the applicable metering section.

Important

The customer's electrical services will be metered at the voltage supplied by EDTI.

  • For single-meter installations where the service voltage is 277/480 V or 347/600 V and 200 A or less, the meter socket must be installed on the outside of the building and on the load side of the main disconnect (cold metered).
  • For single-meter installations where the service voltage is 120/240, 120/208, or 240 Delta and 200 A or less, the meter socket must be installed on the line side of the main disconnect (hot metered) and on the outside of the building.
  • The meter socket for 1-phase services that are 100 A and larger must be a minimum of 300 mm high, 190 mm wide, and 100 mm deep so it meets the minimum bending radius of the aluminum secondary conductors.
  • When electrical services are supplied by an underground service conductor larger than a 1/0 CN, the meter socket must be a minimum of 400 mm high, 280 mm wide, and 100 mm deep. Smaller meter socket enclosures can only be used for services of 60 A or less.
  • In multiple-meter installations, each meter must be installed on the load side of its own lockable disconnecting device, as depicted in Drawing 19. The disconnecting device must not interrupt service to any other meter.

  • The main disconnect device may be either a fused switch or a breaker suitable for service entry. These disconnects must have the supply voltage clearly marked (e.g., 480 V, 600 V). This is not applicable to multi-family units and mobile home parks.
  • All electrical equipment must bear the evidence-of-approval marking of certification organizations that are recognized by the Standards Council of Canada and acceptable to EDTI.
  • Round sockets may only be used on services using Number 6 American Wire Gauge (#6 A.W.G.) or smaller wire.
  • The meter must be placed in a location that EDTI can access at all times.
  • Electrical rooms must be located on ground floors, where practical.
  • If an electrical room is located on a floor other than the ground floor, it must be accessible by a proper stairway as defined in the Alberta Building Code. Please refer to the building code for "private" or "public" stair types. For example, the maximum rise is 200 mm, the minimum run is 210 mm, the tread depth is a minimum of 235 mm, and the width is 900 mm. Access by a ladder is not acceptable.
  • For any electrical room located below grade, a 1 in. conduit must be installed from the electrical room to the nearest above-grade outside wall, in a location not subject to mechanical damage. One end of the conduit must be stubbed out and installed within 1 m of the revenue meter in the basement electrical room. The other end of the conduit must enter a 150 mm × 150 mm × 100 mm (6 in. × 6 in. × 4 in.) outlet box mounted on the nearest exterior wall of the building. The complete run of conduit must be installed without fittings or junction boxes. If the conduit run cannot be carried out without fittings or junction boxes, the electrical contractor must install LMR-400 or equivalent cable within the conduit. A 120 V receptacle must be installed within 1 m of the conduit stub-out in the basement utility room. See Drawing 22.
8.2 Commercial Metering – Greater Than 200 Amps

One of the most important parts of your construction is correctly installing the meter so that it will accurately measure the amount of electricity you use.

The following metering information is for commercial applications. If you are installing a different electrical service, please see the applicable metering section.

Important

The customer's electrical services will be metered at the voltage supplied by EDTI.

  • For all transformer-rated services, the meter socket in Drawing 20 must be used. The socket must be Thomas & Betts Cat. # CT113-SWL, or an approved equivalent with a 10-pole test switch and 13-jaw meter socket. The test switch must be pre-wired. The socket must be CSA-approved.
  • The meter socket must be installed on the load side of the main disconnect.
  • The meter socket and instrument enclosures must conform to the sizes noted in Table 11. See Drawing 20 for the meter and test block enclosure.
  • The meter socket and instrument transformer enclosure must be connected by a 32 mm (1.25 in.) conduit or raceway and should not include any LBs, if possible. The conduit or raceway must only contain the wires used for the meter installation. The total length of conduit from the metering transformer to the meter cannot exceed 7.0 m. The conduit must enter the enclosure as identified in Drawing 22, using approved knockouts.
  • In multiple-meter installations, each meter must be installed on the load side of its own lockable disconnecting device. The disconnecting device must not interrupt service to any other meter.
  • The instrument transformer enclosure must only contain the metering transformer installation. The conduit entering the enclosure cannot interfere with the installation of any of the conductors, the transformer, or the enclosure cover. The conduits carrying the main service conductors must also enter the enclosure in a way that won't interfere with installing conductors to the metering cabinet.
  • The metering instrument enclosure must have a hinged access door, or hinged doors to allow for installing and inspecting meter equipment.
  • When a main feeder and a standby feeder are provided to one site, they must be separately metered. The metering must be installed on the line side of the customer's transfer switch.
  • Current transformers must be mounted on the inside back wall of the instrument transformer enclosure and have the polarity marks on the line side, as per Drawing 21. Mounting must allow for removing the current transformers without needing to remove the enclosure.
  • Potential transformers should be mounted on the bracket supplied. If no brackets are supplied, the transformers should be mounted on the back, sides, or bottom of the cabinet and should be spaced to provide ease of wiring (approximately 100 mm).
  • Rigid bus and suitable insulators must be used on all services over 600 A. The bus must be continuous from the main switch to the current transformers and from the transformers to sub-switching or splitter bars. When service conductors can be used (e.g., for services 600 A or less and sub-service applications), a short piece of rigid bus and suitable insulators are to be connected to either side of the current transformers, as per Drawing 21. This would require a custom metering transformer enclosure. A drawing of the enclosure must be submitted to EDTI Customer Engineering Services before EDTI will grant construction approval.
  • All meter sockets and instrument transformer enclosures must be securely mounted plumb, level, and clear of all objects, and conform to Drawings 21 22, and 23. For multi-meter installation requirements, please see Drawing 19.
  • In cubicles containing switches or air circuit breakers over 600 A, the meter socket must be mounted remote from the switchgear.
  • On outdoor transformer-rated freestanding installations, the meter socket must be mounted on supports remote from the switchgear.
  • Service equipment must be located in a separate room of adequate size, or in a location that is acceptable to EDTI and the inspection authority. A key for the electrical room must be provided to the EDTI Meter Reading department. The electrical room cannot contain mechanical equipment. It must contain electrical and/or communication equipment only.
  • The meter must be placed in a location that EDTI can access at all times.
  • Electrical rooms must be located on ground floors, where practical.
  • If an electrical room is located on a floor other than the ground floor, it must be accessible by a proper stairway as defined in the Alberta Building Code. Please refer to the building code for "private" or "public" stair types. For example, the maximum rise is 200 mm, the minimum run is 210 mm, the tread depth is a minimum of 235 mm, and the width is 900 mm. Access by a ladder is not acceptable.
  • For any electrical room located below grade, a 1 in. conduit must be installed from the electrical room to the nearest above-grade outside wall, in a location not subject to mechanical damage. One end of the conduit must be stubbed out and installed within 1 m of the revenue meter in the basement electrical room. The other end of the conduit must enter a 150 mm × 150 mm × 100 mm (6 in. × 6 in. × 4 in.) outlet box mounted on the nearest exterior wall of the building. The complete run of conduit must be installed without fittings or junction boxes. If the conduit run cannot be carried out without fittings or junction boxes, the electrical contractor must install LMR-400, or equivalent, cable within the conduit. A 120 V receptacle must be installed within 1 m of the conduit stub-out in the basement utility room. See Drawing 22.
8.3 Residential Metering – 200 Amps and Less

One of the most important parts of your construction is correctly installing the meter so that it will accurately measure the amount of electricity you use.

The following metering information is for residential applications. If you are installing a different electrical service, please see the applicable metering section.

Important

The customer's electrical services will be metered at the voltage supplied by EDTI.

  • The customer-supplied meter socket must be a minimum of 300 mm high, 190 mm wide, and 100 mm deep so that it meets the minimum bending radius of the aluminum secondary conductors.
  • When electrical services are supplied by an underground service conductor larger than 1/0 CN, the meter socket must be a minimum of 400 mm high, 280 mm wide, and 100 mm deep.
  • The customer is to supply the meter socket. For underground fed facilities only, the contractor is to make the termination on the load side. EDTI requires 450 mm of service conductor to be left above the meter socket for termination purposes. The service will not be energized unless the meter socket and the service conduit are attached to the permanent structure.
  • Existing 60 A services may maintain the use of the round meter sockets only on services using #6 American Wire Gauge (#6 AWG) or smaller.
  • If the service conductors are fed from a customer service pedestal and run to a splitter on the side of a multi-family unit, the meter sockets fed from that splitter must be individually cold metered, as per Drawing 19. Rule 6-104 of the Canadian Electrical Code will not apply.
  • Notwithstanding the above, when multi-meter assemblies are used, hot metering will be permitted with the disconnecting device installed on the load side of the utility meter.
  • Metering is not supplied on the secondary side of customer-owned transformers. In multiple-meter installations, each meter must be installed on the load side of its own lockable disconnecting device, as depicted in Drawing 19. The disconnecting device must not interrupt service to any other meter.
  • It is the electrician's responsibility to ensure that the numbering of meter sockets matches the number of individual units.
  • If the service conductors are fed from a pedestal and run to a multi-meter socket on the side of a multi-family unit, they do not have to be individually cold metered. Rule 6-104 of the Canadian Electrical Code will not apply.
  • If the service conductors are fed directly from a transformer and run to a multi-meter socket on the side of a multi-family unit, they must be limited to four consumer services on that building, as stated in Rule 6-104 of the Canadian Electrical Code.
  • Meter sockets must be located outdoors on the exterior of the house or garage to provide unimpeded access at all times to anyone installing, changing, testing, or reading the metering equipment.
  • Meter sockets must also be in a location acceptable to the inspection authority and EDTI.
  • Meter sockets cannot be recessed into walls, enclosed, boxed in, or otherwise obstructed in a way that would impede removal, reading, testing, or reinstallation.
  • Meter sockets cannot be located in proximity to sundecks, balconies, carports, or breezeways that could be enclosed in the future. The customer will not enclose a meter socket without EDTI's prior approval. If approval is given, the customer is responsible for all costs associated with relocating the meter to an accessible location.
  • For service changes and upgrades, the customer's contractor will coordinate the disconnection and reconnection of the service with EDTI's Metering Section. Please call (780) 412-3810.
  • When contractors are installing a combination main breaker and meter socket, Typical Photo 1 is the only type of box that is acceptable for underground fed services. The underground cable must extend through the gutter on the right side in the top section of the enclosure. Microelectric has two models that are aceptable: Model#C01-100G for 100 A and Model #C02-200G for 200 A. Other manufacturers may have similar equipment.
8.4 Residential Metering – Greater Than 200 Amps

One of the most important parts of your construction is correctly installing the meter so that it will accurately measure the amount of electricity you use.

The following metering information is for residential applications. If you are installing a different electrical service, please see the applicable metering section.

Important

The customer's electrical services will be metered at the voltage supplied by EDTI.

  • Revenue meters must be located outdoors on the exterior of the house or garage, or in areas accessible to EDTI.
  • The instrument transformer enclosure cannot be located within a residence. It may be located outdoors in a weatherproof enclosure or, for aesthetics, it may be mounted inside the garage.
  • For all transformer-rated services, the meter socket in Drawing 20 must be used. The socket must be Thomas & Betts Cat. # CT113-SWL, or an approved equivalent with a 10-pole test switch and 13-jaw meter socket. The test switch must be pre-wired. The socket must be CSA-approved.
  • The metering equipment must be installed on the load side of the main disconnect.
  • Meter socket and instrument enclosures must conform to the sizes noted in Table 11. See Drawing 20 for the meter and test block enclosure.
  • The meter socket and instrument transformer enclosure must be connected by a 32 mm (1.25 in.) conduit or raceway and should not include any LBs, if possible. The conduit or raceway must only contain the wires used for the meter installation. The total length of conduit from the metering transformer to the meter cannot exceed 7.0 m. The conduit must enter the enclosure as identified in Drawing 22, using approved knockouts.
  • The instrument transformer enclosure must only contain the metering transformer installation. The conduit entering the enclosure must not interfere with the installation of any primary wires, the transformer, or the enclosure cover. The conduits carrying the main service conductors must also enter the enclosure in a way that won't interfere with installing conductors to the metering cabinet.
  • Current transformers must be mounted on the inside back wall of the instrument transformer enclosure and have the polarity marks on the line side, as per Drawing 21. Mounting must allow for removing the current transformers without needing to remove the enclosure.
  • Rigid bus and suitable insulators must be used on all services over 600 A. The bus must be continuous from the main switch to the current transformers and from the transformers to sub-switching or splitter bars. Service conductors can be used; however, a short piece of rigid bus and suitable insulators are to be connected on either side of the current transformers, as per Drawing 21. This would require a custom metering transformer enclosure. A drawing of the enclosure must be submitted to EDTI Customer Engineering Services before EDTI will grant construction approval.
  • All meter sockets and instrument transformer enclosures must be securely mounted plumb, level, and clear of all objects, and conform to Drawings 21, 22, and 23. For multi-meter installation requirements, please see Drawing 19.
  • For service changes and upgrades, the customer's contractor must coordinate the disconnection and reconnection of the service with EDTI's Metering Section. Please call (780) 412-3810.
8.5 Network Area Metering – 200 A and Less (Socket Style)

The network area extends from 97 to 110 Street and from 97 to 104A Avenue in downtown Edmonton.

One of the most important parts of your construction is correctly installing the meter so that it will accurately measure the amount of electricity you use.

The following metering information is for network applications. If you are installing a different electrical service, please see the applicable metering section.

Important

  • The customer's electrical services will be metered at the voltage supplied by EDTI.
  • For a single-meter installation where the service required is 120/208 V, 2-phase, 3-wire, a 5-jaw meter socket (Drawing 19) must be installed on the load side of the main disconnect on the outside of the building.
  • When the service voltage is 347/600 and less than 200 A, the meter socket must be installed on the outside of the building on the load side of the main disconnect.
  • For single-meter installations where the service voltage is 120/208, the meter socket must be installed on the load side of the main disconnect on the outside of the building.
  • The meter socket for 1-phase services that are 100 A and larger must be a minimum of 300 mm high, 190 mm wide, and 100 mm deep so that it meets the minimum bending radius of the aluminum secondary conductors.
  • When electrical services are supplied by an underground service conductor larger than a 1/0 CN, the meter socket must be a minimum of 400 mm high, 280 mm wide, and 100 mm deep. Smaller meter socket enclosures can only be used for services of 60 A or less.
  • In multiple-meter installations, each meter must be installed on the load side of its own lockable disconnecting device, as depicted in Drawing 19. The disconnecting device must not interrupt service to any other meter. The main disconnect device may be a fused switch or a breaker suitable for service entry. These meter bases must have the supply voltage clearly marked (e.g., 600 V).
  • All electrical equipment must bear the evidence-of-approval marking of certification organizations that are recognized by the Standards Council of Canada and acceptable to EDTI.
  • Round sockets may only be used on services using Number 6 American Wire Gauge (#6 AWG) or smaller wire.
  • The meter must be placed in a location that is accessible to EDTI at all times.
  • Electrical rooms must be located on ground floors, where practical.
  • If an electrical room is located on a floor other than the ground floor, it must be accessible by a proper stairway as defined in the Alberta Building Code. Please refer to the building code for "private" or "public" stair types. For example, the maximum rise is 200 mm, the minimum run is 210 mm, the tread depth is a minimum of 235 mm, and the width is 900 mm. Access by a ladder is not acceptable.
  • Service equipment must be located in a separate room of adequate size, or in a location that is acceptable to EDTI and the inspection authority. A key to the electrical room must be provided to the EDTI Meter Reading department. The electrical room cannot contain mechanical equipment. It must contain electrical and/or communication equipment only.
  • For any electrical room located below grade, a 1 in. conduit must be installed from the electrical room to the nearest above-grade outside wall, in a location not subject to mechanical damage. One end of the conduit must be stubbed out and installed within 1 m of the revenue meter in the basement electrical room. The other end of the conduit must enter a 150 mm × 150 mm × 100 mm (6 in. × 6 in. × 4 in.) outlet box mounted on the nearest exterior wall of the building. The complete run of conduit must be installed without fittings or junction boxes. If the conduit run cannot be carried out without fittings or junction boxes, the electrical contractor must install LMR-400 cable within the conduit. A 120 V receptacle must be installed within 1 m of the conduit stub-out in the basement utility room. See Drawing 22.
8.6 Network Area Metering – Greater Than 200 A

The network area extends from 97 to 110 Street and from 97 to 104A Avenue in downtown Edmonton.

One of the most important parts of your construction is correctly installing the meter so that it will accurately measure the amount of electricity you use.

The following metering information is for network applications. If you are installing a different electrical service, please see the applicable metering section.

Important

  • The customer's electrical services will be metered at the voltage supplied by EDTI.
  • For all transformer-rated services, the meter socket in Drawing 20 must be used. The socket must be Thomas & Betts Cat. # CT113-SWL, or an approved equivalent with a 10-pole test switch and 13-jaw meter socket. The test switch must be pre-wired. The socket must be CSA-approved.
  • Metering equipment must be installed on the load side of the main disconnect.
  • Meter socket and instrument enclosures must conform to the sizes noted in Table 11. See Drawing 20 for the meter and test block enclosure.

  • The meter socket and instrument transformer enclosure must be connected by a 32 mm (1.25 in.) conduit or raceway and should not include any LBs, if possible. The conduit or raceway must contain only those wires used for the meter installation. The total length of conduit from the metering transformer to the meter cannot exceed 7.0 m. The conduit must enter the enclosure as identified in Drawing 22, using approved knockouts.
  • The instrument transformer enclosure must only contain the metering transformer installation. The conduit entering the enclosure must not interfere with the installation of any conductors, the transformer, or the enclosure cover. The conduits carrying the main service conductors must also enter the enclosure in a way that won't interfere with installing conductors to the metering cabinet.
  • When a main feeder and a standby feeder are provided to one site, they must be separately metered. The metering must be installed on the line side of the customer's transfer switch.
  • Current transformers must be mounted on the inside back wall of the instrument transformer enclosure and have the polarity marks on the line side, as per Drawing 23. Mounting must allow for removing the current transformers without needing to remove the enclosure.
  • Potential transformers should be mounted on the bracket supplied. If none are supplied, they should be mounted on the back, sides, or bottom of the cabinet and should be spaced to provide ease of wiring (approximately 100 mm).
  • Rigid bus and suitable insulators must be used on all services over 600 A. The bus must be continuous from the main switch to the current transformers and from the transformers to sub-switching or splitter bars. When service conductors can be used, a short piece of rigid bus and suitable insulators are to be connected to either side of the current transformers Drawing 21. This would require a custom metering transformer enclosure. A drawing of the enclosure must be submitted to EDTI Customer Engineering Services before EDTI will grant construction approval.
  • All meter sockets and instrument transformer enclosures must be securely mounted plumb, level, and clear of all objects, and conform to Drawings 21, 22, and 23. For multi-meter installation requirements, please see Drawing 21.
  • In cubicles containing switches or air circuit breakers over 600 A, the meter socket must be mounted remote from the switchboard.
  • On outdoor transformer-rated freestanding installations, the meter socket must be mounted on supports remote from the switchgear.
  • Service equipment must be located in a separate room of adequate size, or in a location that is acceptable to EDTI and the inspection authority. A key to the electrical room must be provided to the EDTI Meter Reading department. The electrical room must not contain mechanical equipment. It must contain electrical and/or communication equipment only.
  • The meter must be placed in a location that EDTI can access at all times.
  • Electrical rooms must be located on ground floors, where practical.
  • If an electrical room is located on a floor other than the ground floor, it must be accessible by a proper stairway as defined in the Alberta Building Code. Please refer to the building code for "private" or "public" stair types. For example, the maximum rise is 200 mm, the minimum run is 210 mm, the tread depth is a minimum of 235 mm, and the width is 900 mm. Access by a ladder is not acceptable.
  • For any electrical room located below grade, a 1 in. conduit must be installed from the electrical room to the nearest above-grade outside wall, in a location not subject to mechanical damage. One end of the conduit must be stubbed out and installed within 1 m of the revenue meter in the basement electrical room. The other end of the conduit must enter a 150 × 150 × 100 mm (6 × 6 × 4 in.) outlet box mounted on the nearest exterior wall of the building. The complete run of conduit must be installed without fittings or junction boxes. If the conduit run cannot be carried out without fittings or junction boxes, the electrical contractor must install LMR-400 cable within the conduit. A 120 V receptacle must be installed within 1 m of the conduit stub-out in the basement utility room. See Drawing 22.
8.7 Primary Metering

One of the most important parts of your construction is correctly installing the meter so that it will accurately measure the amount of electricity you use.

The following metering information is for primary electrical applications. If you are installing a different electrical service, please see the applicable metering section.

Important

When a main feeder and a standby feeder are provided to one site, they must be separately metered. The metering must be installed on the line side of the customer's transfer switch.

  • Provisions must be made for three-element metering.
  • Metering transformers are to be installed on the load side of the circuit breakers and must be capable of being isolated electrically from both supply and load. On services with an alternate source, such as an on-site generator or feeder, switches will be installed to allow isolation of metering equipment.
  • Metering transformers must be mounted so they are readily accessible for testing or changing, with adequate working space provided.
  • Space must be provided in the customer's main metering cell for revenue metering transformers. Metering current transformers and potential transformers (with fusing) will be supplied by EDTI and, where feasible, will be installed at the factory when the main cubicle is being fabricated. Where this isn't possible, EDTI will make the transformers available for installation by the customer.
  • A grounding bus must be provided adjacent to the metering transformers. Transformer cases are to be bonded to ground.
  • Provision must be made for installing the potential transformers in a drawer-type cabinet with low- and high-potential opening devices. These drawers must run the full depth of the cabinet.
  • The potential transformer cabinet must be built with adequate strength to support three potential transformers and be located at floor level. A door with provision for sealing must be installed to provide access to the potential transformers. Pin-type contacts are not acceptable.
  • Potential transformer discharge circuits must be a positive make-type with a braid-type wiper.
  • Potential transformers' secondary contacts must be of the open positive make-type, compliant with Measurement Canada's bulletin.
  • The high-potential conductors of revenue potential transformers must be connected on the EDTI side of the revenue current transformers.
  • At any reasonable time, EDTI has the right to read, inspect, remove, and test metering equipment installed by the property owner or controlled by the customer. When EDTI requests it, a key for the electrical room must be provided to the EDTI Meter Reading department.
  • The meter socket in Drawing 20 must be used. The socket must be Thomas & Betts Cat. # CT113-SWL, or an approved equivalent with a 10-pole test switch and 13-jaw meter socket. The test switch must be pre-wired. The socket must be CSA-approved.
  • The meter socket and instrument enclosures must conform to the sizes noted in Table 11. See Drawing 20 for the meter and test block enclosure.
  • The meter socket and instrument transformer enclosure must be connected by a 32 mm (1.25 in.) conduit or raceway and should not include any LBs, if possible. The conduit or raceway must contain only those wires used for the meter installation.
  • The length of conduit should be such that the total length of metering wiring from instrument transformers to the meter socket should not exceed 8.0 m. The conduit must enter the meter enclosure as identified in Drawing 22, using approved knockouts.
  • All meter sockets must be securely mounted plumb, level, and clear of all objects, and conform to Drawing 23. For multi-meter installation requirements, please see Drawing 19.
  • A 14 mm (0.5 in.) conduit wired with telephone conductor (e.g., Cat 5) must be provided from a marked knockout in the 13-jaw meter socket to the customer's main telephone panel or a suitable communication (e.g., VOIP) demarcation point.
  • In cubicles containing switches or air circuit breakers, the meter socket must be mounted remote from the switchboard.
  • On outdoor freestanding installations, the meter socket must be mounted on supports remote from the switchgear.
  • Service equipment must be located in a separate room of adequate size. A key to the electrical room must be provided to the EDTI Meter Reading department. The electrical room must not contain mechanical equipment. It can only contain electrical and/or communication equipment.
  • The meter must be placed in a location that EDTI can access at all times.
  • Electrical rooms must be located on ground floors, where practical.
  • If an electrical room is located on a floor other than the ground floor, it must be accessible by a proper stairway as defined in the Alberta Building Code. Please refer to the building code for "private" or "public" stair types. For example, the maximum rise is 200 mm, the minimum run is 210 mm, the tread depth is a minimum of 235 mm, and the width is 900 mm. Access by a ladder is not acceptable.
  • EDTI has specific servicing details for the Quarters Downtown Development area. If your development is in this area, which extends from 92 to 97 Street and from 101 to 103A Avenue, please contact us for details.
  • Any electrical room located below grade a 1 in. conduit is required to be installed from the electrical room in question to the nearest above grade outside wall, in a location not subject to mechanical damage. The one end of the conduit shall be stubbed out and install within 1 meter of the revenue meter in the basement electrical room. The other end of the conduit shall enter a 150 mm × 150 mm × 100 mm (6 in. × 6 in. × 4 in.) deep outlet box mounted on the nearest exterior wall of the building. The complete run of conduit shall be installed through-out its entirely with-out fittings or junction box. If the conduit run cannot be carried out with-out fittings or junction boxes, the electrical contractor shall include in his installation, the installation of LMR-400 cable with-in the conduit. A 120V receptacle shall be installed within 1 meter of the conduit stub-out in the basement utility room. See Drawing 22.

​Section Links

Drawing 19

Multi-meter installation

Drawing 20

Meter and test block enclosure current transformer rated meter socket

Drawing 21

Three phase instrument transformers for installation over 200 amp enclosure layout diagram

Drawing 22

Instrument transformer metering layout

Drawing 23

Instrument transformer wiring diagram

Table 11

Meter socket and instrument enclosures