Lighting Circuit Nuetrals in Domestic Light Switches

[DPG]

Ok, so you fix the jb to the joist. The cable that comes from it to the down light will still move around when, as you say, you are messing with the light. Not having it fixed would actually be better for the terminations.
bnin

No, use a JB with strain relief for both the incoming and outgoing cables. Doesn't have to be fixed then and no dangr of cables working loose. Daz

 

[Andy78]

Ok, so you fix the jb to the joist. The cable that comes from it to the down light will still move around when, as you say, you are messing with the light. Not having it fixed would actually be better for the terminations.
bnin

The reason you would fix the JB to a surface is so that you could add external strain relief in the form of cable clips.

 

[Jay Sparks]

But how can you clip the cable supplying the down light. LiKe i said, there is very little chance of movement on the terminations if the job is done right. How often do you need to take the down light down.

 

[ipf]

Heavens above! We're 'outlawing' decently installed, unfixed brown jb's, above recessed lights when you look at the state of some of the items we come across. Let's get real.....

 

[DPG]

To be fair, I don't think anyone is outlawing decently installed traditional round junction boxes! Daz

 

[Andy78]

All that's being stated is what's currently compliant and what's not.
This may or may not have a bearing on what makes sense or has a bearing on real life issues in installs.

 

[ipf]

To be fair, I don't think anyone is outlawing decently installed traditional round junction boxes! Daz

'outlawing'....being used as a term of phrase, not literally......but almost as good as, and I'm sure some would take it that way.
It's just making mountains out of molehills, again.

 

[Midwest]

Common chaps you can't argue DPG's point. Brown circular JB's have been around donkeys years. They were designed to be fixed to a surface, joist perhaps, and the cables entering them were clipped to said joist. No strain likely on terminals. That was how I was taught as an apprentice. Over the cause of time, these JB's have been used in a way they weren't designed for, done it myself.
I very rarely use them now, preferring MF boxes. Cables entering fittings (sockets etc) are normally clipped, in trunking etc or covered over with plaster. Is someone takes off the faceplate (Mr Decorator), well you can't cover all bases, and is another matter entirely. All of the of the downliight I've fitted have a cable strain clamp. Not the case for all other luminaires I grant you.