Government of Canada / Gouvernement du Canada
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Canada Occupational Health and Safety Regulations (SOR/86-304)

Regulations are current to 2020-11-17 and last amended on 2019-06-25. Previous Versions

PART VIIIElectrical Safety (continued)

Termination of Guarantee of Isolation

  •  (1) Every person in charge shall, when work on or a live test of isolated electrical equipment is completed,

    • (a) inform the guarantor thereof; and

    • (b) make and sign a record in writing containing the date and hour when he so informed the guarantor and the name of the guarantor.

  • (2) On receipt of the information referred to in subsection (1), the guarantor shall make and sign a record in writing containing

    • (a) the date and hour when the work or live test was completed; and

    • (b) the name of the person in charge.

  • (3) The records referred to in subsections (1) and (2) shall be kept by the employer for a period of one year after the date of signature thereof at his place of business nearest to the work place in which the electrical equipment is located.

  • SOR/88-632, s. 24(F)

Safety Grounding

  •  (1) No employee shall attach a safety ground to electrical equipment unless he has tested the electrical equipment and has established that it is isolated.

  • (2) Subsection (1) does not apply in respect of electrical equipment that is grounded by means of a grounding switch that is an integral part of the equipment.

  • SOR/88-632, s. 25(F)
  •  (1) Work must not be performed on any electrical equipment in an area if the following devices are found unless the device is connected to a common grounding network:

    • (a) a grounding bus,

    • (b) a station grounding network,

    • (c) a neutral conductor,

    • (d) temporary phase grounding, or

    • (e) a metal structure.

  • (2) If, after the connections are made, a safety ground is required to ensure the safety of an employee working on the electrical equipment, the safety ground shall be connected to the common grounding network.

  • SOR/2019-246, s. 40

 Every conducting part of a safety ground on isolated electrical equipment shall have sufficient current carrying capacity to conduct the maximum current that is likely to be carried on any part of the equipment for such time as is necessary to permit operation of any device that is installed on the electrical equipment so that, in the event of a short circuit or other electrical current overload, the electrical equipment is automatically disconnected from its source of electrical energy.

  • SOR/88-632, s. 26(F)
  •  (1) For the purposes of subsection (2), a

    point of safety grounding

    point of safety grounding means

    • (a) a grounding bus, a station grounding network, a neutral conductor, a metal structure or an aerial ground, or

    • (b) one or more metal rods that are not less than 16 mm in diameter and are driven not less than l m into undisturbed compact earth at a minimum distance of 4.5 m from the base of the pole, structure, apparatus or other thing to which the electrical equipment is attached or from the area where persons on the ground work and in a direction away from the main work area. (point de mise à la terre)

  • (2) No safety ground shall be attached to or disconnected from isolated electrical equipment except in accordance with the following requirements:

    • (a) the safety ground shall, if feasible, be attached to the pole, structure, apparatus or other thing to which the electrical equipment is attached;

    • (b) all isolated conductors, neutral conductors and all non-insulated surfaces of the electrical equipment shall be short-circuited, electrically bonded together and attached by a safety ground to a point of safety grounding in a manner that establishes equal voltage on all surfaces that can be touched by persons who work on the electrical equipment;

    • (c) the safety ground shall be attached by means of mechanical clamps that are tightened securely and are in direct contact with bare metal;

    • (d) the safety ground shall be so secured that none of its parts can make contact accidentally with any live electrical equipment;

    • (e) the safety ground shall be attached and disconnected using insulated protection equipment and tools;

    • (f) the safety ground shall, before it is attached to isolated electrical equipment, be attached to a point of safety grounding; and

    • (g) the safety ground shall, before being disconnected from the point of safety grounding, be removed from the isolated electrical equipment in such a manner that the employee avoids contact with all live conductors.

  • SOR/88-632, s. 27
  • SOR/94-263, s. 21(F)
  • SOR/98-427, s. 3(F)
  • SOR/2019-246, s. 41

Switches and Control Devices

  •  (1) Every control device shall be so designed and located as to permit quick and safe operation at all times.

  • (2) The path of access to every electrical switch, control device or meter shall be free from obstruction.

  • (3) Where an electrical switch or other device controlling the supply of electrical energy to electrical equipment is operated only by a person authorized to do so by the employer, the switch or other device shall be fitted with a locking device that only an authorized person can activate.

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