Arrange for immediate inspection and repair by a registered electrical contractor if the safety of an electrical installation is in doubt (e.g. current leakage or frequent tripping).

Avoid touching any socket outlet or switch with wet hands.

Each socket outlet should only be inserted with one adaptor or one extension unit to prevent circuit overload.

To ensure safety, arrange a registered electrical contractor to inspect and test an electrical installation periodically even though its approved loading does not exceed 100A.

When a blackout occurs, major electrical appliances should be switched off to prevent, when power supply is resumed, the occurrence of momentary circuit overload and hence a blackout again.