Recommended Wire and Protective Device SIzes for Domestic Electrical Installations

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Safe wiring in domestic installations requires the use of the correct sizes of wire and protective device to avoid over loading switch gears and creating the potential for a fire hazard. The wiring regulations recommended the sizes for wire and protective devices enumerated in the table below as the minimum requirement for any domestic wiring  and installation


Type of Circuit
Supply Voltage
Recommended Wire Size
Recommended Size of Protective Device (Amps) 
Lighting
230VAC
1.5mm2
10 Amps Fuse, 10 Amps Circuit Breaker
Sockets
230VAC
2.5mm2
16 Amps Circuit Breaker, 20 Amps Fuse
Water Heater
230VAC
2.5mm2
16 Amps Circuit Breaker, 20 Amps Fuse
Washing Machine
230VAC
2.5mm2
16 Amps Circuit Breaker, 20 Amps Fuse
Air Conditioners
230VAC
2.5mm2
16 Amps Circuit Breaker, 20 Amps Fuse
Cooker
230VAC
6.0mm2
32 Amps Circuit Breaker, 32 Amps Fuse