Skip ribbon commands
Skip to main content

Updated May 2017


Before you choose your connection, it's important to understand the process that needs to be followed. Here's what you need to know:

1.1 Power Connection Process and Time Frames

EPCOR Distribution and Transmission Inc. (EDTI) has an easy-to-follow process available on epcor.com that describes the power connection process and the length of time it typically takes to get connected. If you are looking for a Primary Metered Service, please see the Time Frames Section (5.2) for more information on timing. Depending on the type of connection you need, the entire process can take months to complete. It's important to plan this time frame into your schedule.

1.2 Clearance to Overhead and Underground Power Lines

It's also important to be aware of any power lines in the area when planning your construction. The required clearance for overhead power lines may be as much as 7.0 metres. You must consider the proximity of planned structures to power lineslines; structures that are too close to power lines can cause serious safety risks. All costs associated with meeting the required code clearances are the owner's responsibility. If the site is deemed unsafe, a stop-work order may be issued. You can get more information on building near overhead lines and learn more at Where's the Line.

1.3 Project Overview
Table 1 is a valuable guide to help you with your planning and construction. It provides a summary of the types of service connections and outlines the customer's responsibilities, as well as EDTI's responsibilities, when completing a new connection. The table includes the service connection point and point of service.
Definitions

Service connection point:

The point at which the customer's facilities physically connect to EDTI's distribution system to permit the customer to obtain electricity. For an underground service, this could also be described as the specific point at which EDTI's civil work ends and the customer's begins.

Point of service:

The electrical connection point at which EDTI's service conductors are connected to the conductors or apparatus of a customer.

1.4 Select the service type that works for you

We've noticed that most new customers need information about specific connections, so we are providing information in that format. Take special note of the maximum service limits. EDTI Customer Engineering Services must confirm all services prior to EDTI granting construction approval. The maximum service limits specified below apply only to dedicated transformers. If multiple customers share a transformer, limits may need to be reduced or alternate servicing arrangements made. Contact us to discuss your particular servicing details.

Maximum service limits apply to services within our 15 kV and 25 kV service areas. For any new or increased services in the 5 kV distribution area, contact us for limits. Refer to Drawing 29 for the primary voltage in your area, and contact us for confirmation.

Mutual heating can affect the number of secondary conductors required, which in turn may limit your choice of service type. See rule 4.004 (d) of the Canadian Electrical Code Part 1 for more information on mutual heating and the Cable Installation Section (2.22) of this guide for information on the maximum number of conductors allowed.

2.0 Padmount Transformer

 

A ground-mounted transformer located on private property. Typical installations include medium to large commercial applications, large houses, and multi-family sites.

Table 1A

​Commercial Service Limits Residential Service Limits​

120/240 V, 1 Ph, 3 W – 600 A
240 V, 3 Ph, 3 W – N/A
120/208 V, 3 Ph, 4 W – 2,800 A
120/208 V, 2 Ph, 3 W – N/A
277/480 V, 3 Ph, 4 W – 2,200 A (Temporary Service)
347/600 V, 3 Ph, 4 W – 2,400 A

120/240 V, 1 Ph, 3 W – 600 A
120/208 V, 2 Ph, 3 W – N/A

Services larger than 100 A by special permission only.

 

​Customer's Responsibilities

  • Complete civil work on private property. This typically includes all trenching, ducting, pull boxes, concrete bases for any padmount equipment, grounding, and guardrails.
  • Supply and install secondary cable.
  • Install Current Transformers and Potential Transformers.
  • Supply the primary cable on multi-family sites.

NOTE: The customer owns and maintains all transformer bases, switching cubicle bases, ground grids, primary ducts, and all secondary works on private property. Customer owns and maintains primary cable in MFU sites.

​EDTI's Responsibilities

  • Complete all work on public property.
  • Supply primary cable, except for multi-family sites, where the customer supplies the primary cable.
  • Supply, install, and terminate all padmount equipment.
  • Supply Current Transformers and Potential Transformers
  • Supply and install revenue metering equipment.

NOTE: EDTI owns and maintains all transformers, switching cubicles, primary cable (except for multi-family sites), and revenue metering equipment.

Service Connection Point (Service Entry Point)

Property line.

Point of Service Termination (Electrical Connection Point)

Property line for multi-family sites, transformer for all other installations.


Padmount Transformer Service Guide

Back to Top

​Commercial Service Limits Residential Service Limits​

120/240 V, 1 Ph, 3 W – 600 A
240 V, 3 Ph, 3 W – N/A
120/208 V, 3 Ph, 4 W – 3,000 A
120/208 V, 2 Ph, 3 W – N/A
277/480 V, 3 Ph, 4 W – 3,000 A
347/600 V, 3 Ph, 4 W – 2,400 A

120/240 V, 1 Ph, 3 W – 600 A
120/208 V, 2 Ph, 3 W – N/A

Services larger than 100 A by special permission only.

 

3.0 Aerial service

 

An overhead service run from a power pole. Typical installations include homes and small commercial applications.

Table 1B

​Commercial Service Limits Residential Service Limits
​120/240 V, 1 Ph, 3 W – 400 A
240 V, 3 Ph, 3 W – by special permission only
120/208 V, 3 Ph, 4 W – 400 A
277/480 V, 3 Ph, 4 W – 150 A (Temporary Service)
347/600 V, 3 Ph, 4 W – 150 A

​120/240 V, 1 Ph, 3 W – 400 A

 Services larger than 100 A by special permission only.

 

Customer's Responsibilities

  • Complete all work on the building, including installation of the weatherhead and service attachment.
  • Install Current Transformers and Potential Transformers.
  • Install and maintain all intermediate poles and associated hardware, including racks, anchors, and downhauls with only secondary conductors attached.

NOTE: The customer owns and maintains poles and anchors with only secondary wires attached.

​EDTI's Responsibilities

  • Complete all work on public property.
  • Supply and install overhead secondary conductors and make the final connection at the transformer and weatherhead.
  • Supply, install, and maintain all high-voltage utility equipment, including conductors, transformers, and switches.
  • Install and maintain all intermediate poles, anchors, and downhauls with highvoltage (primary) conductors attached on the line side of the point of service.
  • Supply Current Transformers and Potential Transformers.
  • Supply and install revenue metering equipment.

Note: EDTI owns and maintains all poles, anchors, and downhauls on the line side of the point of service with primary wire attached, overhead secondary conductors, and revenue metering equipment.

Service Connection Point (Service Entry Point)

​Weatherhead on the building.

​Point of Service Termination (Electrical Connection Point)

Weatherhead on the building.


Aerial Service Guide

Back to Top

4.0 Underground secondary Service

 

This is a secondary underground service fed from an existing transformer, new transformer, or pedestal installed on City of Edmonton property. Typical installations include homes and small to medium commercial applications.

Table 1C

​Commercial Service Limits Residential Service Limits

Ground-Mounted Transformer

120/240 V, 1 Ph, 3 W – 600 A
240 V, 3 Ph, 3 W – N/A
120/208 V, 3 Ph, 4 W – 3,000 A
277/480 V, 3 Ph, 4 W – 3,000 A
347/600 V, 3 Ph, 4 W – 2,400 A

Pole-Mounted Transformer

120/240 V, 1 Ph, 3 W – 600 A
240 V, 3 Ph, 3 W – by special permission only
120/208 V, 3 Ph, 4 W – 400 A
277/480 V, 3 Ph, 4 W – 150 A (Temporary service)
347/600 V, 3 Ph, 4 W – 150 A

120/240 V, 1 Ph, 3 W – 600 A

Services larger than 100 A by special permission only.

​​Customer's Responsibilities

  • Complete civil work on private property. This typically includes all trenching, ducting, pull boxes, and grounding.
  • Supply and install secondary cable.
  • Install Current Transformers and Potential Transformers.

Note: The customer owns and maintains all secondary works on private property.

​EDTI's Responsibilities

  • Complete all work on public property.
  • Terminate all secondary conductors at the transformer or pedestal.
  • Supply Current Transformers and Potential Transformers.
  • Supply and install revenue metering equipment.

Note: EDTI owns and maintains all revenue metering equipment.

Service Connection Point (Service Entry Point)

Property line.

​Point of Service Termination (Electrical Connection Point)

Transformer or pedestal.


Underground Secondary Service Guide

Back to Top

5.0 Primary Metered service

 

This is an underground or overhead service above 750 volts phase to phase. Typical installations include very large commercial applications where the demand load will exceed 2,500 KVA to one building, an industrial lot with a single customer, or a commercial lot with a single customer.

Table 1D and 1E

​Commercial Service Limits Residential Service Limits

The service size allowed is governed by many factors. Please contact EDTI Customer Engineering Services.

Underground

​​Customer's Responsibilities

  • Complete civil work on private property. This typically includes all trenching, ducting, pull boxes, concrete bases for any padmount equipment, grounding, and guardrails.
  • Install Current Transformers and Potential Transformers.

NOTE: The customer owns and maintains all switching cubicle bases, ground grids, and primary ducts (everything on the load side of the point of service).

​EDTI's Responsibilities

  • Complete all work on public property.
  • Supply and install primary cable to the line side of the main switchgear.
  • Terminate our primary cable at the customer's switchgear.
  • Supply Currenty Transformers and Potential Transformers.
  • Supply and install revenue metering equipment.

NOTE: EDTI owns and maintains all primary cable on the line side of the point of service and revenue metering equipment.

Service Connection Point (Service Entry Point)

Property line.

​Point of Service Termination (Electrical Connection Point)

Switchgear.

Aerial

​​Customer's Responsibilities

  • Install all poles, anchors, and wire on the load side of the service connection point.

NOTE: The customer owns and maintains all poles, anchors, and wire on the load side of the service connection point.

​EDTI's Responsibilities

  • Install poles, anchors, and wire on the line side of the service connection point.
  • Supply and install Current Transformers and Potential Transformers.
  • Supply and install revenue metering equipment.

NOTE: EDTI owns and maintains all poles, anchors, Current Transformers, and Potential Transformers on the line side of the point of service.

Service Connection Point (Service Entry Point)

Second pole past the load side of the primary meter structure.

​Point of Service Termination (Electrical Connection Point)

First pole past the load side of the primary meter structure (GI pole).

6.0 Network Service

 

This is a 120/208 volt or 347/600 volt service located in the network area with the transformer connected to EDTI’s network system. The network area extends from 97 to 110 Street and from 97 to 104A Avenue in downtown Edmonton. Typical installations include medium to large commercial applications.

Table 1F

​Commercial Service Limits Residential Service Limits

120/240 V, 1 Ph, 3 W – N/A
240 V, 3 Ph, 3 W – N/A
120/208 V, 3 Ph 4 W – 3,000 A
120/208 V, 2 Ph, 3 W – 100 A
347/600 V, 3 Ph, 4 W – 1,600 A

Please contact EDTI for confirmation of the network voltage available in your area.

120/240 V, 1 Ph, 3 W – N/A
120/208 V, 2 Ph, 3 W – 100 A

Please contact EDTI for confirmation of the network voltage available in your area.

​​Customer's Responsibilities

  • Complete civil work on private property. This typically includes all trenching and ducts.
  • Install Current Transformers and Potential Transformers.

NOTE: The customer owns and maintains all secondary ducts on private property.

​EDTI's Responsibilities

  • Complete all work on public property.
  • Supply and install secondary conductors and make the final connection at the transformer or ring bus and the customer's switchgear.
  • Supply Current Transformers and Potential Transformers.
  • Supply and install revenue metering equipment.

NOTE: EDTI owns and maintains the secondary cable to the line side of the switchgear and revenue metering equipment.

Service Connection Point (Service Entry Point)

Property line.

​Point of Service Termination (Electrical Connection Point)

Switchgear.


Network Service Guide

Back to Top

7.0 Unmetered Service

 

An unmetered service only available to the City of Edmonton and communication utility companies. Typical installations include streetlights, traffic signals, and small utility service.

Table 1G

​Commercial Service Limits Residential Service Limits
120/240 V, 1 Ph, 3 W – 100 A*

240 V, 3 Ph, 3 W – N/A
120/208 V, 3 Ph, 4 W – 100 A*
120/208 V, 2 Ph, 3 W – N/A
347/600 V, 3 Ph, 4 W – 100 A*

Not Available

* The actual demand load must be less than 60 amps.

​​Customer's Responsibilities

  • Complete trenching, ducting, and grounding.
  • Supply and install secondary cable up to the EDTI agreed-upon demarcation point.
  • For installations installed by EPCOR or one of its designated agents, please reference the Transportation Electrical Systems Asset Definition Agreement.

NOTE: The customer owns and maintains all secondary cable and duct on the load side of the agreed-upon demarcation point.

​EDTI's Responsibilities

  • Supply and install required transformers, poles, and other equipment on public property.

NOTE: EDTI owns and maintains all facilities on the line side of the agreedupon demarcation point.

Service Connection Point (Service Entry Point)

EDTI agreed-upon demarcation point

​Point of Service Termination (Electrical Connection Point)

EDTI agreed- upon demarcation point


Unmetered Service Guide

Back to Top