Electrical Safety


Safety Tips for Using Electricity

According to the Electricity Ordinance, all electrical work including installation, repair and testing should be carried out by Registered Electrical Worker (REW).

Mains Switch

  • Check to see that the main switch is in good condition 
  • Label "ON" and "OFF" clearly
  • Be readily accessible in case of emergency
  • Familiarise yourself with the location of the main switch

Residual Current Devices (RCDs)

  • Use RCD to protect yourself from shock. They are especially important in kitchens, bathrooms, and places where water is present
  • Test the RCDs regularly according to the manufacturer's instructions at least every three months

Circuit Breakers / Fuses

  • Choose correct rating and type of circuit breakers / fuses
  • Label each circuit breaker / fuse to indicate which circuit it protects
  • Replace the blown fuse with a new one of the proper size and rating. Never substitute a fuse with other objects, such as a coin or paper clip
  • Know how to reset circuit breakers, and replace blown fuses properly. Before conducting any replacement, turn off the appliances and lights in use
  • If the appliances are unplugged but the circuit breakers tripped off again, there could be a fault on that circuit. You should seek assistance from a qualified electrician

Socket Outlets

  • Avoid excessive use of extension units or universal adaptors
  • Check for outlets that are loose-fitting or broken
  • Arrange replacement for any broken or missing wall plates
  • Place safety caps in all unused outlets, especially the ones that can be accessed by children


  • Use plugs that comply with local / international statutory safety requirements for use in Hong Kong
  • Check the plug itself. Look for signs of damage or discolouration on the plug
  • Make sure the power cord is firmly clamped in the plug
  • Don't force a plug into an outlet if it doesn't fit


  • Check if cords are in good condition – no part of the cable is worn, split, cracked or frayed. Arrange for replacement if necessary
  • Insert or remove a plug by grapping the plug itself, not the cord
  • Do not run electrical cords underneath carpets, rugs or furniture. Keep them away from hot appliances and corrosive materials
  • Cover power cord with rubber protector strip if it has to be laid across a pathway
  • Unplug the appliance from socket outlet before detaching a detachable power cord from the appliance


  • Schedule regular checking for damaged fittings, cables and connections
  • Bulbs should be screwed securely into the fixtures. Loose light bulbs can lead to overheating
  • Don't use bulbs that require higher wattage than the fixture allows
  • Ensure outdoor lighting fittings and luminaires are weatherproof


  • Use appliances that meet local / international safety requirements for use in Hong Kong
  • Check condition of appliances
  • Never cover up ventilation holes or slots on appliances
  • Inspect for damaged wiring, plugs, and connectors
  • Never touch an appliance with wet hand
  • Don’t touch the plugged-in appliance if it drops into water. Turn off power and unplug the appliance
  • Get appliance inspected by qualified electrician if it constantly blows a fuse, flips a circuit or feels tingling on contact, or has a burning smell / sizzling sound

Outdoor Use Safety

  • Make sure each electric tool is grounded or certified with double insulation
  • Never use appliances that are not designed for outdoor use
  • Don't use electric-powered appliances or tools outdoor when it is raining, on wet grass or in damp area
  • Use only extension cords marked for suitable outdoor use
  • When using a ladder outside, keep yourself, tools and ladder well away from power lines  


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