Hong Kong Regulations

ELECTRICITY (WIRING) REGULATIONS - REGULATION 18

Alterations and additions

(1) No alteration or addition shall be made to an existing fixed electrical
installation unless-

   (a)  the ratings and the conditions of the existing electrical equipment of
        the affected parts are suitable and adequate for the altered
        circumstances; and

   (b)  the protection against overcurrent, earth fault currents and dangerous
        earth leakage currents for the affected parts is altered as necessary
        for the altered circumstances.

(2) The maximum current demand of a fixed electrical installation after an
alteration or addition shall not exceed the existing approved  loading for the
installation unless the electricity supplier approves a new loading for the
installation. (Enacted 1990)