Hong Kong Regulations

FACTORIES AND INDUSTRIAL UNDERTAKINGS (ELECTRICITY) REGULATIONS - REGULATION 7

Construction of switches, circuit breakers etc.

PART III

SWITCHES, CONDUCTORS AND ELECTRIC MOTORS

Every switch, switch fuse, circuit breaker and isolating link shall be-

   (a)  constructed, placed and protected so as to prevent electrical  hazard;

   (b)  constructed and adjusted accurately so as to make and maintain
        effectual contact;

   (c)  provided with a handle or other suitable means of working, insulated
        from the system and arranged so that the person operating it is
        unlikely to make accidental contact with live metal;

   (d)  constructed and installed in such manner so that when in an "off"
        position it cannot accidentally make contact with live metal;

   (e)  constructed and installed in such manner so that it cannot with proper
        care be left in partial contact with live metal; and

   (f)  constructed and installed in such manner as may be necessary to
        prevent electrical hazard from arcing and so that an arc cannot
        accidentally be maintained.