found old junction boxes

[xr4x4]

Whats a 'joint box' ?

This is usefull information..

www.tlc-direct.co.uk/Technical/DataSheets/Hager/JB_Guide.pdf

 

[mattylad]

What if the terminal on a JB was filled with hot melt glue?

Would that keep them tight ?

 

[RF Lighting]

That makes their products look really good, and traditional junction boxes look rubbish.

It's almost as if they're trying to sell them

 

[plantyroo]

Whats a 'joint box' ?

This is usefull information..

www.tlc-direct.co.uk/Technical/DataSheets/Hager/JB_Guide.pdf[/QUOTE]

I thought that the 'no-maintenance' type connections were classed as being non-compliant with the regs?

 

[RF Lighting]

The manufacturers seem to imply they do, but they would. They want to sell their product.

If you read Regulation 526.3 I can't see how they can.

 

[xr4x4]

The manufacturers seem to imply they do, but they would. They want to sell their product.

If you read Regulation 526.3 I can't see how they can.

Hmm....

Id use proper crimps all the way if poss.

Put these in choc boxes or similar with stress relief.

 

[plantyroo]

The manufacturers seem to imply they do, but they would. They want to sell their product.

If you read Regulation 526.3 I can't see how they can.

Would something like this be allowed

http://www.qvsdirect.com/Armoured-Cable-Resin-Joint-Kit-for-2-3-4-5-Core-1.5-to-6mm-pr-19922.html

 

[xr4x4]

The manufacturers seem to imply they do, but they would. They want to sell their product.

If you read Regulation 526.3 I can't see how they can.

Would something like this be allowed

http://www.qvsdirect.com/Armoured-C...2-3-4-5-Core-1.5-to-6mm-pr-19922.html[/QUOTE]

i dont see how it can.. over the years as the copper heats, expands and contracts it gets loose in the joint.

i cant see how resin will stop that.

 

[westie101]

i dont see how it can.. over the years as the copper heats, expands and contracts it gets loose in the joint.

i cant see how resin will stop that.

DNO's have used this sort of joint for over 10 years with an expected life of 50 years, we can operate our cables at higher temperatures than in installations and are not worried (we are also using a similar design up to 33,000V

 

[xr4x4]

i dont see how it can.. over the years as the copper heats, expands and contracts it gets loose in the joint.

i cant see how resin will stop that.

DNO's have used this sort of joint for over 10 years with an expected life of 50 years, we can operate our cables at higher temperatures than in installations and are not worried (we are also using a similar design up to 33,000V

ok, but to be clear.. the joints are screw terminals?

if so, why do standard junction boxes with screw terminals need to be accessable?

 

[westie101]

ok, but to be clear.. the joints are screw terminals

Exactly the same design as we use in some of our joints on smaller cables.
Larger sizes use a screw connector that snaps off at a predetermined torque.

I do wonder about some of the interpretation of regs. That sort of joint can be used on armoured cable, buried in the ground and left for years - I suppose it could be classed as accessible as you can dig it up, but not repair it.