Electrical installations must have effective earthing arrangement. To ensure safety, do not remove any earthing connection.

Concealed electrical wiring of new electrical installations must have suitable mechanical protection (e.g. conduits).

Electrical wiring must be segregated from telephone / telecommunication wiring. The wiring of these two categories must not be installed inside the same conduit or trucking unless specific safety requirements are complied with.

Distribution boards must have identification labels to indicate the purposes of individual circuits.

An electrical appliance with high power consumption should receive power supply from a single socket outlet. Therefore, sufficient nos. of socket outlets should be installed.

Any socket outlet installed in a bathroom must be at least 0.6 metre away from any shower basin and bathtub.

Socket outlets should be installed as far away as practicable from any water tap, gas tap and cooking range.

Circuits for socket outlets must be protected by a residual current device (RCD) (also called "earth leakage circuit breaker (ELCB)").

Outdoor luminaires, socket outlets and switches must be of weatherproof types.

For the luminaire, exhaust fan and electric water heater inside a bathroom, the on/off switches should be installed outside the bathroom.

For more safety requirements on electrical installations, you may consult registered electrical contractors / workers.