With reference to 433.1.204 and cable as installed has min capacity of 20A if protected by a 30A or 32A. If the protective device is reduced to 20A how is the new minimum as installed capacity calculated or arrived at ? I've been looking in the Electrical Installation Design Guide, but the answer is avoiding my eyes.
I like the idea ebee of not having a dedicated rfc for the kitchen and or utility room but instead to have the two rfc circuits into the kitchen, say one each side or however it works out. This way it takes into account the fact that the rest of the dwelling takes very little so in theory, you could have say 60 A of potential kitchen load with the remaining 4 A supplying the TVs etc. The only downside is clarity on the CU to identify the circuits as I've only seen a few complying with the latter part of 514.9.1..............
" clarity on the CU to identify the circuits" once saw a Periodic done about 18 ,months after my rewire stating "kitchen sockets on lounge ring" as a defect.
There was no circuits labelled as "Kitchen sockets" or "lounge sockets" but clear indications of circuits on consumer unit with a detailed laminated sheet of exact extent of circuits stuck next to CU too.
I chose the 1m example as one that almost never occurs, unless there is a socket in the cupboard with the consumer unit.
Surely it must depend very much upon the architecture. If the CU is in a utility room, there is almost certain to be a socket close by; and if the plumbing is in a particular place, that is where the washing machine, etc. must go.
In most dwellings, a ring around the periphery of the rooms with sockets at fairly regular intervals will do; but if it is along a service corridor with a room (or rooms) at the end, the situation is different.
I agree with ebee - not much point in making a radial to the far point with an empty leg on the way back. Better to wire it as a (4 mm²) radial in the first place. Saves a little copper too!
I suggest that any half-way competent electrician should be able to install (and I&T) both types of circuit and make a reasonable choice as to which suits best.
"I suggest that any half-way competent electrician should be able to install (and I&T) both types of circuit and make a reasonable choice as to which suits best."
Agreed.
However there are some ringists and some antiringists too, quite dependant on age.
