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Cable sizer

Which cable do I need?

Tell us what you're wiring and how far it is from the DB board. You get the breaker, the cable size and how many metres to buy, with the parts ready to add to your cart.

1What are you wiring?
2How much power does it draw?

The rating plate on the appliance gives watts (W) or amps (A).

3How far is it from the DB board?

Measure along the route the cable takes: up walls, across the ceiling and down again.

4How does the cable run?
Breaker
20A
Single pole
Cable
2.5mm²
Surfix, 2-core and earth
Buy
30m
With 10% for bends and ends

Voltage drop0 V · 0%

What to buy

    A guide for planning and buying, for single-phase 230 V circuits. Sizes follow the usual SANS 10142-1 limits with the voltage drop kept under 5%. A registered electrician must do the installation and issue the COC.