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Discuss 16A off 32A ring in the Electrical Forum area at ElectriciansForums.net

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Pretty Mouth

Pretty Mouth

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Here is something that may be of interest to this thread. It's from the OSG, App. H2 -
Final circuits using socket-outlets complying with BS 1363-2 and fused connection units complying with BS 1363-4.

2020-09-15-182617_1366x768_scrot.png

Unless I've missed something, it appears to apply to ring finals. With this in mind, what do other forum members feel about a 16A socket on a ring final, locally protected by a 16A breaker?
 
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John-SJW

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Post automatically merged:

Unless I've missed something, it appears to apply to ring finals. With this in mind, what do other forum members feel about a 16A socket on a ring final, locally protected by a 16A breaker?
That is what I asked and other way to around a problem. :) :)

Here is something that may be of interest to this thread. It's from the OSG, App. H2 -
Final circuits using socket-outlets complying with BS 1363-2 and fused connection units complying with BS 1363-4.

View attachment 60840

Unless I've missed something, it appears to apply to ring finals. With this in mind, what do other forum members feel about a 16A socket on a ring final, locally protected by a 16A breaker?
Interesting. So the installation I saw with a Wylex switch on the ring with a 16A fuse to a commercial socket outlet appears to fall in line with the regs, at least in part. Although, would a 16A commercial socket/plug comply or would it have to be permanently connected.

It looks like the rule of thumb that not higher that 13A off a ring is not true.
 
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J

John-SJW

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  • #27
Post automatically merged:

Here is something that may be of interest to this thread. It's from the OSG, App. H2 -
Final circuits using socket-outlets complying with BS 1363-2 and fused connection units complying with BS 1363-4.

View attachment 60840

Unless I've missed something, it appears to apply to ring finals. With this in mind, what do other forum members feel about a 16A socket on a ring final, locally protected by a 16A breaker?
"A circuit breaker not exceeding 16A."
Does that mean the rating of the switching contacts?
 
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Pete999

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Another great thread from this troll.

Asks for advice then won’t listen to it. This guy would try to argue that black is actually white.
Here is something that may be of interest to this thread. It's from the OSG, App. H2 -
Final circuits using socket-outlets complying with BS 1363-2 and fused connection units complying with BS 1363-4.

View attachment 60840

Unless I've missed something, it appears to apply to ring finals. With this in mind, what do other forum members feel about a 16A socket on a ring final, locally protected by a 16A breaker?
What's the point of having a RFC on a16 Amp OCPD? just to accommodate a 16 Amp socket simpler to run the socket from a dedicated 16Amp circuit
 
Pretty Mouth

Pretty Mouth

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What's the point of having a RFC on a16 Amp OCPD? just to accommodate a 16 Amp socket simpler to run the socket from a dedicated 16Amp circuit
Hi Pete. The 16A breaker would be local protection rather than whole circuit protection. It would protect only the 16A socket, and the ring would be protected by the usual 32A breaker
 
DPG

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Hi Pete. The 16A breaker would be local protection rather than whole circuit protection. It would protect only the 16A socket, and the ring would be protected by the usual 32A breaker
I must admit I thought he (the OP) was on about splitting the radial and putting it on 2 x 16A breakers?
 
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Dartlec

Arms
Hi Pete. The 16A breaker would be local protection rather than whole circuit protection. It would protect only the 16A socket, and the ring would be protected by the usual 32A breaker
Seems like there might be a market for some sort of premade unit that would comply with that to allow the 15A oven example to be connected (where diversity and other loading conditions allow). Doubt it would be pretty enough to be on show though....
 
Pretty Mouth

Pretty Mouth

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Seems like there might be a market for some sort of premade unit that would comply with that to allow the 15A oven example to be connected (where diversity and other loading conditions allow). Doubt it would be pretty enough to be on show though....
There are small, cheap units available that would take MCBs such as this one from wylex:


You would have to decide if a plastic one was ok, or if a metal one would be more appropriate. But yeah, you'd want it hidden in a cupboard out of view!
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Personally, I think a 16A socket on a ring final, locally protected by a 16A MCB may be safe, and may be compliant.

Here is a comparison of the time/current characteristics for a 13A BS1362 fuse vs. a 16A BS60898 MCB. Appologies for the poor quality of the image, but hopefully you can see that for most of the curve, the 16A breaker opens quicker for the same overcurrent.

13A BS1362 vs 16A BS60898.jpg
 
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Pete999

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Hi Pete. The 16A breaker would be local protection rather than whole circuit protection. It would protect only the 16A socket, and the ring would be protected by the usual 32A breaker
"16Amp socket from a rfc protected by a 16 Amp breakerWas what was said Mate
 
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