ECN Forum Forums General Topics of the Trade Non-US Electrical Systems & Trades 27A MCB?

Never heard of a 25 or a 27A MCB.

Standard MCBs here these days are 6, 10, 16, 20, 32, 40A (the 6, 16, and 32 sizes used to be 5, 15, and 30A).

Radial socket arrangements recognized by the IEE may be on 20 or 32A radials, but of course BS1363 then has a fuse in the plug.

Our old BS546 5A outlets could be wired on a circuit rated up to 15A.