Kitchen Light Circuit????

[ngoodson1969]

Hi All,

I just wondered whether the circuit below will work:
A 2 gang switch, 1 switch does the pendant, the other does the 4 down-lighters and a separate single switch for the under-cupboard lights? Thanks.

 

[Spudnik]

Well done lads,

We leave you all for 5 minutes and this happens.

Please don't make Admin come in here to sort you out.

They have enough to do as it is.

It makes us look bad, and i dont do bad.

As Dave said, do it again and you will be banned.

 

[saveloy]

I've been JBing DL's for ages Saveloy, the connectors on them are usually rubbish, and rarely can you get two twins in, ( although i have noticed recently they are generally getting better ) if the JB is sat on plaster board can't see the problem.

The problem is that there are no cord grips on normal JB's. So unless the JB is fixed and the cable clipped, there is a chance that the terminations will be strained. To counter this problem Ashley have produced a D/L box with cord grips,( Some also use a chocbox) . Using a normal JB is a no no under BS7671

 

[Gravid]

Unless you've wired them to short the terminations are never going to come under any strain. Like i said the JB is sat

on the plasterboard next to the fitting. I thought every spark in the land used 201's to do downlights before the

invention of the chocbox? When did they become a no no in the regs book? Cheers.

 

[saveloy]

BS 7671 17th REG 522.8.5
Every cable or conductor shall be supported in such a way that it is not exposed to undue mechanical strain and so that there is no appreciable mechanical strain on the terminations of the conductors, account being taken of mechanical strain imposed by by the supported weight of the cable or conductor itself.

Even if the JB is sat next to the downlighter after installation, there is a concern that, during installation the terminals could be subject to mechanical strain, at the terminals during installation and/ or during maintenance. This is because the sheath of the cable is not restrained as there are no cord grips on a JB.

I don't write the regs. If you are happy with using JBs thats fair enough, but they do not comply with regs in the way that you are using them.

 

[Gravid]

Oh right, well i think Appreciable (obvious) is the key word, if they didn't comply with regs surely we should have failed the yearly inspections.

 

[saveloy]

Download the pdf from this page.17th Edition Junction Box Guide Hager Hope this helps.

 

[Ashley Williams]

So am i right in thinking that the round brown/black/white junction box's are no longer alloud under bs7671???? I can defently see the resoning around it. Strangly this is what we where taught to use this year in college.

Ashley

 

[saveloy]

So am i right in thinking that the round brown/black/white junction box's are no longer alloud under bs7671???? I can defently see the resoning around it. Strangly this is what we where taught to use this year in college.

Ashley

Junction boxes are still perfectly acceptable under BS7671 when used in the correct manner.
They should be readily accessable for maintenance and testing. ie in loft spaces. They should also be permantly fixed (screwed to a joist) and not free floating. All cables entering the JB should be clipped so as to avoid strain on the terminations. Personally I try to avoid using them at all, but they are still ok to be used in the right situation.

 

[Ashley Williams]

Cool thought so thanks for the info

A