Ceiling junction box position

[ricklthompson]

Anybody have an idea where the best position in the ceiling void for ceiling junction boxes to be positioned? this in a first fix new build.

 

[EFLImpudence]

Why do you need junction boxes?

For downlights?

 

[DaftPunk]

There shouldn't be any junction boxes on a new build job.

 

[plugwash]

Anybody have an idea where the best position in the ceiling void for ceiling junction boxes to be positioned? this in a first fix new build.

The short answer is to avoid junction boxes wherever reasonably possible. Having connections that are difficult to find and access makes testing and fault finding much harder.

If specing out a new build I would loop at the switch. It takes a bit more cable than looping at the lights but makes installing fancy light fittings far less problematic.

 

[crystal ball]

If you want to use JBs on an new build, go ahead there are no regs to prohibit them, but they must be accessible, previously I have positioned a J701 near the loft hatch on an upright, keeps it easy to access and out of harms way

 

[DaftPunk]

It's an absolutely cack way of doing things and there is no reason what so ever to not do things properly on a new build.

 

[crystal ball]

Its a matter of opinion, nothing wrong with a correctly installed JB method

 

[bernardgreen]

Junction boxes

• bernardgreen
• 13 May 2011
• 6

All junctions boxes must be accessible

Nice and accessible behind a drop down panel.

 

[flameport]

Its a matter of opinion, nothing wrong with a correctly installed JB method

Which means properly accessible, and in a ceiling void that isn't going to happen.

There is also the additional unnecessary cost and installation time when using such devices.

New build or rewire = no junction boxes are needed or wanted.

 

[crystal ball]

Its a matter of opinion, nothing wrong with a correctly installed JB method

Which means properly accessible, and in a ceiling void that isn't going to happen.

There is also the additional unnecessary cost and installation time when using such devices.

New build or rewire = no junction boxes are needed or wanted.

Well if it was not accessible it would not be correctly installed would it

Extra cost-hard to quantify, extra time again hard to quantify

All cables brought back to a 701 clipped and written up on a circuit card and connected to a fixed terminal block, not one floating round in the back of a switch nice tidy job and makes fault finding easy, whats not to like?

 

[RF Lighting]

The fact that there's a pointless joint?

You should be aiming to have no joints any where on any job ever.

This isn't always possible when making additions and alterations, and is sometimes required as a last resort, but on new work there is no reason at all to install them. It is usually written into the contract on commercial works that joints are not permitted.

 

[crystal ball]

You should be aiming to have no joints any where on any job ever

How can you manage that, every switch drop/light fitting will have a joint

 

[sparkwright]

In the old days, it was very common to use junction boxes all over on new wiring systems.

One reason was to save cable.

However, hidden junction boxes are very inconvenient, particularly when it comes to fault finding.

I suspect you want the junction box on a lighting circuit.

Looping the supply cables at either the switch or the light fitting is the preferred method now. Looping at the switch means only one cable required at the light - which can make fitting the light fitting easier.

You can use a maintenance free junction boxfor what you propose to do if you must, but as you must have gathered by now, it's not recommended to have inaccessible joints.