Home Run in other countries

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ActionDave said:
Interesting. I don't know if they use ring circuits. I'll ask.
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We still use ring circuits although some of the younger electricians don’t like them, mainly because they don’t understand them. They like the design calculations even less.

Yes it is a peculiar British thing that dates back to 1942, at the same time the BS1363 plug and socket was introduced. The BS1363 fused plug is the reason we can safely use a 32A supply to the ring.
 
Tony S said:
We still use ring circuits although some of the younger electricians don’t like them, mainly because they don’t understand them. They like the design calculations even less.

Yes it is a peculiar British thing that dates back to 1942, at the same time the BS1363 plug and socket was introduced. The BS1363 fused plug is the reason we can safely use a 32A supply to the ring.
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I like the idea of them. I wish they were incorporated here.
 
The BS1363 plug can be fitted with a 1, 2, 3, 5, 7, 10, or 13A fuse. The socket live and neutral contacts are shuttered so kids can’t poke things in them. They’re versatile and safe and we’re very protective of them.

Hopefully they’ll be our defence against the menace of the AFCI, or AFDD as they will called over here if they get a foot in the door.

The plugs and sockets are almost enshrined in the regulations, it’s the ring circuit that’s under threat as radial circuits are easier for the youngsters.
 
Tony S said:
The BS1363 plug can be fitted with a 1, 2, 3, 5, 7, 10, or 13A fuse. The socket live and neutral contacts are shuttered so kids can’t poke things in them. They’re versatile and safe and we’re very protective of them.

Hopefully they’ll be our defence against the menace of the AFCI, or AFDD as they will called over here if they get a foot in the door.

The plugs and sockets are almost enshrined in the regulations, it’s the ring circuit that’s under threat as radial circuits are easier for the youngsters.
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And an even greater threat to DIYs :eek: How many 1.5 and 2.5mm2 unfused branches running to a dozen newly added sockets are found by UK sparkies? Or the broken rings testing revels? Not bashing, just a concern.
 
mbrooke said:
And an even greater threat to DIYs :eek: How many 1.5 and 2.5mm2 unfused branches running to a dozen newly added sockets are found by UK sparkies? Or the broken rings testing revels? Not bashing, just a concern.
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Probably as many Roger the Bodger’s jobs uncovered by electricians your side of the water.
You’ll never stop DIYers having a go.

BTW there is nothing in BS7671 giving cable sizes for a ring circuit. The requirement is for the cable size the protection must be suitable and meet disconnection times.
 
Tony S said:
Probably as many Roger the Bodger’s jobs uncovered by electricians your side of the water.
You’ll never stop DIYers having a go.

BTW there is nothing in BS7671 giving cable sizes for a ring circuit. The requirement is for the cable size the protection must be suitable and meet disconnection times.
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Sure, but also the continuous current is taken into account when selecting the cable. If someone pulls a 1.5mm2 T&E of a 32 amp ring final nothing is technically protecting that cable. Yes a DIY would do that, but what happens when the ring breaks without a DIY touching it?
 
mbrooke said:
Sure, but also the continuous current is taken into account when selecting the cable. If someone pulls a 1.5mm2 T&E of a 32 amp ring final nothing is technically protecting that cable. Yes a DIY would do that, but what happens when the ring breaks without a DIY touching it?
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Does Romex suddenly disconnect itself?

DIYers don’t give a damn for any codes or regulations.
 
Tony S said:
Does Romex suddenly disconnect itself?

DIYers don’t give a damn for any codes or regulations.
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It can, by a broken splice. Difference is the circuit goes dead, in a ring final you have 2.5mm2 where either the live or neutral could carry 32 amps. And in theory you could also violate disconnect times.
 
m sleem said:
It can be located in both locations customer/poco, voltage level will be medium,
The use of the RMU is to have a redundant power supply through two feeders "double ended"
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I would call that a "Tie Breaker".

Not sure if it would have the same name if it were medium voltage and power company owned.
 
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