Lectrician
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We generally use a 16amp socket, on a D20 breaker in the board (if its a submain, you have to be careful about discrimination).
Like plug says, get a spark to calculate the cable size to ensure the Zs is low enough. He will need to know the cable length, and the Ze at the origin of your supply (he could take 0.35 as the Ze, as this is the max the REC will give, but usually it is a lot lower, and this 'rule of thumb' figure may lead to un-necessarily large cables.
Anyone on here could calculate for you if you give us the distance, and if the cable proves to large, then we could recalculate if we knew the Ze.
Confussing??
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