Section 52, The Machinery (Safe Working Citation

All underground cables, other than signalling wires andflexible cables for portable apparatus, shall, unless exempted, in writing, by the Chief Inspector of Machinery- (a) have connections to their conductors made at properly constructed joints only, (b) be protected by a suitable metallic covering electrically continuous thro11ghout, and such covering shall be earthed, and . (c) be adequately supported. · 53. {1) All accessible metallic portions of every electrical apparatus which, though normally not forming part of an electrical circuit, may accidentally become live at a pressure exceeding low pressure to earth shall be either protected by an insulating covering or shall be connected to earth by a conductor of adequate cross-sectional area. (2) Every flexible wire for electrical apparatus, for alternating currents or for apparatus above 150 volts direct current, shall be connected to the system either by efficient permanent joints or connections, or by a properly constructed connector. {3) In all cases where the person employed in any works who handles electrical apparatus or pendant lamps with switches for a~ternating current, or pressures above 150 volts direct current would be liable to get a shock if the metal work of the electrical apparatus becomes charged, the metal work shall be efficiently earthed; and any flexible metallic covering of the conductors shall be itself efficiently earthed and shall not itself be the only earth connection for the metal of the apparatus. A lampholder Machinery (Safe Working & Inspection) [Cap. 218 1859 shall not be in metallic connection with the guard or other metal work of an electrical lamp. (4) In all works and in any place where the pressure exceeds low pressure, the electrical apparatus and its flexible wire shall be controlled by efficient means suitably located and capable of cutting off the pressure, and the metal work shall be efficiently earthed independently of any flexible metallic cover of the conductors, any such flexible covering shall itself be independently earthed.