Before my post yesterday about ring or radial for garage sockets I assumed that I needed either a 2.5mmsq ring circuit or a 6mmsq radial circuit. But one answer I received suggested that a 2.5mmsq radial would suffice.
Wanting to understand this better I have spent quite some time this morning looking on the Internet. My new understanding is:
Ring Circuit, 2.5mmsq, 32amp MCB, maximum floor area of 100sq m
Radial Circuit, 2.5mmsq, 20amp MCB, maximum floor area of 20sq m
Radial Circuit, 4mmsq, 32amp MCB, maximum floor area of 60sq m
Can someone give a concise description of why this is so? How is this calculated? I would love to understand this fully.
Thanks,
Steve