PART XXVI ELECTRICAL OPERATIONS — De-energized high voltage systems - isolation and lockout
492
(1) Before working on a high voltage power system that, for reasons of safety, shall be de-energized, the worker in charge shall ensure that the part of the system being worked on is isolated and grounded and locked out where required by these regulations.
492(2)
A barrier or other form of distinctive identification shall be used to differentiate high voltage electrical equipment which has been de-energized for safety reasons from similar energized equipment at the work location where a lack of identification would result in undue risk to workers.
492(3)
Where it is impracticable to lock out a power system or part of a power system,
492(a)
the boundaries of the power system or part shall be clearly defined;
492(b)
written work procedures respecting safety protection guarantees and complying with the requirements of sections 493 to 497 shall be followed; and
492(c)
major equipment used to establish safety protection guarantees shall be uniquely identified at a conspicuous place on or near the equipment.
Not legal advice. Verify the cited article against the signed agreement.