Ring and radial circuits?

wonderwire · 11 Feb 2017

I have a new flat and am learning about the layout of its electrical circuits.

I've been able to trace 1 ring main from the CU through the loft and back again. There are 2 other MCBs marked "S/O 32A". Are these also likely to be ring circuits or could they be radial?

Just curious, no other reason!

EFLImpudence · 11 Feb 2017

Likely to be ring final circuits (not ring main) if 2.5mm² cable but could be radial with 4mm².

wonderwire · 11 Feb 2017

Thanks, sorry yes ring final. Everything is 2.5mm so I assume it's most the other two all ring?

I have two other circuit from the CU marked "cooker 32A" and "water heater 20A". I can't see the wiring connections although there is one 2.5mm and one 4-6mm; is the cooker likely to be 2.5mm ring and the water heater 4-6mm radial?

Any idea what "S/O" would mean above the MCBs?

EFLImpudence · 11 Feb 2017

wonderwire said:
is the cooker likely to be 2.5mm ring and the water heater 4-6mm radial?

No, sizes the other way round - and both radials.

Any idea what "S/O" would mean above the MCBs?

Socket Outlets

ban-all-sheds · 11 Feb 2017

3 separate socket circuits in a flat?

wonderwire · 12 Feb 2017

@EFLImpudence Thanks!

@ban-all-sheds Yes, apparently so! I assume these will be ring?

Is it unusual design?

ban-all-sheds · 13 Feb 2017

wonderwire said:
I assume these will be ring?

Almost certainly.

How many L conductors in each circuit breaker?

Is it unusual design?

Well - I guess since "flat" is the UK equivalent of the US "apartment", and some of theirs reach 10,000 square feet over multiple floors, I shouldn't assume that a "flat" is a smallish dwelling.

But 3 socket circuits for a flat feels "unusual".

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Ring and radial circuits?

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