120. Switchgear and terminals .-Switchgear and all terminals, cable-ends, cable-joints and connections to apparatus shall be totally enclosed and shall be so constructed, installed and maintained as to comply with the following requirements:-
(a)all parts shall be of mechanical strength sufficient to resist rough usage;(b)all conductors and contact areas shall be of adequate current-carrying capacity and all joints in conductors shall be properly soldered or otherwise efficiently made;(c)the lodgement of any matter likely to diminish the insulation or affect the working of any switchgear shall be prevented;(d)all live parts shall be so protected or enclosed as to prevent persons accidentally coming into contact with them and to prevent danger from arcs, short-circuits, fire, water, gas or oil;(e)where there may be risk of igniting gas, coal-dust, oil or other inflammable material, all parts shall be so protected as to prevent open sparking; and(f)every switch or circuit-breaker shall be so constructed as to be capable of opening the circuit, if controls and dealing with any short-circuit without danger.
