Hong Kong Regulations

FACTORIES AND INDUSTRIAL UNDERTAKINGS (ELECTRICITY) REGULATIONS - REGULATION 19

Precautions to be taken when persons are working on apparatus

(1) When work has to be carried out on any conductor, apparatus or switchboard
adequate precautions shall be taken, including the prevention of any conductor
or apparatus becoming accidentally live, so as to ensure that the work may be
carried without undue risk from electrical hazard.

(2) A notice in red characters and letters each not less than 50 mm high on a
white background reading "危險－在修理中 DANGER UNDER REPAIR" shall be
placed and displayed in a visible position at, on or near any conductor
apparatus or switchboard being worked on under paragraph (1).