Hong Kong Regulations

ELECTRICITY SUPPLY REGULATIONS - REGULATION 2A

Low and high voltage supply

(1) The company shall supply low voltage electricity to the main incoming
terminals of an owner's electrical installation at a frequency of 50Hz (+/-2%)
at either or both of the following-

   (a)  220V (+/-6%) root mean square alternating current between a phase
        conductor and earth for a single phase supply; and

   (b)  220V (+/-6%) root mean square alternating current between a phase
        conductor and earth and 380V (+/-6%) alternating current between phase
        conductors for a 3 phase supply.

(2) The company shall supply high voltage electricity to the main incoming
terminals of an owner's electrical installation at a frequency of 50Hz
(+/-2%). (L.N. 344 of 1992)