Hong Kong Regulations

FACTORIES AND INDUSTRIAL UNDERTAKINGS (ELECTRICITY) REGULATIONS - REGULATION 8

Protection of circuits by fuses and circuit breakers

(1) Every circuit shall be protected against excess current and energy by
means of a suitable fuse or circuit breaker of adequate breaking capacity
suitably located and of such construction as to prevent electrical hazard from
overheating, arcing, or the scattering of hot metal or other substance when it
comes into operation.

(2) Every fuse and circuit breaker shall be capable of breaking the maximum
prospective excess current or energy at the point of installation and every
switch intended to be used for breaking under load shall be capable of
breaking the load at the point of installation without causing
electrical hazard.

(3) Every fuse shall be either constructed and installed in such manner or
protected by a suitable switch so as to permit the ready renewal of the fuse
element without electrical hazard.