PART 15Electrical Safety (continued)
(a) any other guarantee of isolation given in respect of the electrical equipment for any part of the period for which the guarantee of isolation is given is terminated;
(b) every person to whom the other guarantee of isolation referred to in paragraph (a) was given has been informed of its termination; and
(c) any live test to be performed on the electrical equipment will not be hazardous to the health or safety of the person performing the live test.
(2) Every person performing a live test must warn all persons who, during or as a result of the test, are likely to be exposed to a hazard.
Termination of the Guarantee of Isolation
(2) On receipt of the information referred to in subsection (1), the guarantor must make and sign a record in writing containing
(3) The records referred to in subsections (1) and (2) must be kept by the employer for a period of one year after the day on which they are signed at the employer’s place of business nearest to the work place in which the electrical equipment is located.
(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.
(3) Subject to subsection (4), work may be performed on any electrical equipment, only if the equipment is connected to a common grounding network, in an area in which is located
(4) 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 must be connected to the common grounding network.
(5) Every conducting part of a safety ground on isolated electrical equipment must have sufficient current carrying capacity to conduct the maximum current that is likely to be carried on any part of the equipment for the time that 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.
(6) A safety ground must not be attached to or disconnected from isolated electrical equipment except in accordance with the following requirements:
(a) the safety ground must, to the extent that is practicable, be attached to the pole, structure, apparatus or other thing to which the electrical equipment is attached;
(b) all isolated conductors, neutral conductors and non-insulated surfaces of the electrical equipment must 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 must be attached by means of mechanical clamps that are tightened securely and are in direct contact with bare metal;
(d) the safety ground must be secured so that none of its parts can accidentally make contact with any live electrical equipment;
(e) the safety ground must be attached and disconnected using insulated protection equipment and tools;
(f) the safety ground must, before it is attached to isolated electrical equipment, be attached to a point of safety grounding; and
(g) the safety ground must, before it is disconnected from the point of safety grounding, be removed from the isolated electrical equipment in a manner that the employee avoids contact with all live conductors.
(7) For the purposes of subsection (6), a point of safety grounding means a grounding bus, a station grounding network, a neutral conductor, a metal structure or an aerial ground.
PART 16Hot Work Operations
189 In this Part, hot work means any work where flame is used or a source of ignition may be produced.
190 If hot work is to be performed,
(a) a qualified person must be assigned to patrol the working area and the adjoining areas and maintain a fire protection watch of the area for the duration of the work and, if necessary, for a period of 30 minutes after the work is completed; and
(b) a sufficient number of fire extinguishers shall be provided in the working area and the adjoining areas.
191 Hot work must not be performed in a working area where
(a) flammable gas, vapour or dust may be present in the atmosphere, unless the area has been freed of gas, tested by a marine chemist or other qualified person, and found to be safe for that work to be performed in the area; and
(b) an explosive or flammable substance may be present in the working area, unless a marine chemist or other qualified person has ensured that adequate protection exists to permit that work to be safely performed in the area.
192 (1) Electrical welding equipment cables and gas welding or burning equipment cylinders and pipes must be placed clear of areas used for vehicles unless adequate protection for the cables, cylinders and pipes is provided.
(2) Gas cylinders of welding and burning equipment must be placed securely in an upright position when in use.
193 Before equipment used for hot work is left unattended, the person in charge of the working area must ensure that the equipment is in a safe condition.
194 If a hazardous substance may be produced in a working area as a result of hot work
(a) the working area must be well ventilated; or
(b) any person in the working area must wear a respiratory protective device.
(2) The concentration in a working area of airborne hazardous substances, other than chemical agents, must not be hazardous to the health or safety of the person in the area.
196 The percentage of oxygen in the atmosphere in a working area must not be less than 19.5 per cent or more than 23 per cent by volume at normal atmospheric pressure and in no case is the partial pressure of oxygen to be less than 148 mm Hg.
197 (1) If ventilation equipment is used to maintain the concentration of an airborne hazardous substance below or at the value or percentage referred to in section 195 or the percentage of oxygen in the air of a confined space within the limits referred to in section 196, the employer is prohibited from granting any person access to the working area, unless
(a) the ventilation equipment is
(b) in the event of a failure of the ventilation equipment, sufficient time will be available for a person to escape from the working area before one of the following occurs:
(2) The employee referred to in subparagraph (1)(a)(ii) must activate an alarm in the event of faulty operation of the ventilation equipment.
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