Time to call it a day

[HappyHippyDad]

I beg to differ.2.5 cable can take a max of 27 amps if clipped direct.23amps in a wall or 21 amps above a plasterboard ceiling with insulation.Putting a 2.5 on anything bigger than a 20amp breaker would be madness.Personally i would put a 16amp breaker feeding it.If you wish to back up your claim then please quote the relevant BS7671 number.

I shall take the challenge . I haven't got the BYB with me so I cant give you the exact page but if you take a look at appendix 15, reg 433.1.5, fig 15A and read under the 'unfused spur' title it will say:

"An unfused spur may be
connected to the origin of the
circuit in the distribution board."

If you think about it, it's exactly the same as spurring of a ring. As Ian has said, it cant be overloaded as the CCC is 27A clipped direct and fault protection is easily met with a 32A MCB. Plus.... It is in the regs as above.

 

[Sparkhe]

No the breaker would be oversized it has nothing to do with recent changes.

Hi , I had one 32a mcb spare in the main board and needed 2 separate 16a mcb to supply 2 catering toasters.Not domestic.
So maybe it was wrong . Maybe it is time to bow out .
Thanks for your input

 

[kingeri]

I get the ring final spur but why are people justifying, creating scenarios pushing this cable size to its limit when in reality they wouldn't do it.

Because this is a forum, and they can.
But undersizing the cable then using the regs to back up the decision is pointless if you ask me.

 

[Dave OCD]

I shall take the challenge . I haven't got the BYB with me so I cant give you the exact page but if you take a look at appendix 15, reg 433.1.5, fig 15A and read under the 'unfused spur' title it will say:

"An unfused spur may be
connected to the origin of the
circuit in the distribution board."

If you think about it, it's exactly the same as spurring of a ring.

I said the same or very similar in post #13 HHD, in your defence.

 

[Bob Geldoff1234]

"An unfused spur may be
connected to the origin of the
circuit in the distribution board."

If you think about it, it's exactly the same as spurring of a ring.

Your original post didn't mention spurs.You said you could run a double or single socket directly off a 2.5 fed from a 32amp breaker.in that specific case i would say thats unacceptable.If you were wiring the socket from scratch you would fit a 16amp breaker to feed the double or single socket.

 

[westward10]

I shall take the challenge . I haven't got the BYB with me so I cant give you the exact page but if you take a look at appendix 15, reg 433.1.5, fig 15A and read under the 'unfused spur' title it will say:

"An unfused spur may be
connected to the origin of the
circuit in the distribution board."

If you think about it, it's exactly the same as spurring of a ring. As Ian has said, it cant be overloaded as the CCC is 27A clipped direct and fault protection is easily met with a 32A MCB. Plus.... It is in the regs as above.

Why would you install a radial, not a spur from a ring final in the same manner. Pointless exercise.

 

[HappyHippyDad]

Your original post didn't mention spurs.You said you could run a double or single socket directly off a 2.5 fed from a 32amp breaker.in that specific case i would say thats unacceptable.If you were wiring the socket from scratch you would fit a 16amp breaker to feed the double or single socket.

Come on Bob, admit defeat like a man
What else is a spur if it's not fed from a 32a MCB feeding a single or double socket?
Go on Bob, I've been wrong a hundred times and am happy to put my hands up when defeated... It feels good!

 

[HappyHippyDad]

I said the same or very similar in post #13 HHD, in your defence.

Sorry Dave, didn't see that! Thankyou

I'm off to see a very pretty new girlfriend now so shall say goodbye for now.

 

[westward10]

Come on Bob, admit defeat like a man
What else is a spur if it's not fed from a 32a MCB feeding a single or double socket?
Go on Bob, I've been wrong a hundred times and am happy to put my hands up when defeated... It feels good!

Well it isn't a spur, it is a radial there is no ring final.

 

[Dave OCD]

Sorry Dave, didn't see that! Thankyou

I'm off to see a very pretty new girlfriend now so shall say goodbye for now.

Lucky man ! I'll settle for watching Liverpool v Leicester on the telly tonight, I think the wife would kill me if I went to visit a very pretty new girlfriend.

 

[GMES]

Sorry Dave, didn't see that! Thankyou

I'm off to see a very pretty new girlfriend now so shall say goodbye for now.

Oh no you're not, get back here and argue about the rights and wrongs of sticking 2.5mm cable in a 32a mcb, that will go round and round and round and round and round until we all agree to disagree.

 

[Leesparkykent]

I would prefer LSZH twin and earth in a commercial environment of standard PVC twin and earth.

 

[Rpa07]

Sorry Dave, didn't see that! Thankyou

I'm off to see a very pretty new girlfriend now so shall say goodbye for now.

She's not new, he's had her for ages and that's why he was quiet the latter part of last year. How do you spell oooeeeooo @Pete999 is good at spelling noises!

@Sparkhe, don't be down. You have 30 years of experience to give. If you need to catch up since the 16th then hang around on here and read through the archives. There is the 17th 2382-15 from city and guilds that you would ace then you'd be back on track.
You've probably forgotten more than half of us know, although listening to us bickering about 2.5 Spurs will probably make you want to leave the game anyway.
Hoping to hear more from you, get involved and have a banter!
Respect, Rob

 

[Pete999]

She's not new, he's had her for ages and that's why he was quiet the latter part of last year. How do you spell oooeeeooo @Pete999 is good at spelling noises!

@Sparkhe, don't be down. You have 30 years of experience to give. If you need to catch up since the 16th then hang around on here and read through the archives. There is the 17th 2382-15 from city and guilds that you would ace then you'd be back on track.
You've probably forgotten more than half of us know, although listening to us bickering about 2.5 Spurs will probably make you want to leave the game anyway.
Hoping to hear more from you, get involved and have a banter!
Respect, Rob

 

[Pete999]

What sort of mood are you in for me to spell a noise for you mate? Who ever is thinking of giving up,don't or I'll come over and smack you one understand?