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.
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