Is this a cowboy dodgy practice?

[La Poste]

This is a SWA question.
If I have a length of SWA that is not long enough to reach a plastic CU can I jubilee clip around the armour and run an earth braid or cable to the CU.
Basically what has happened is the new CU has been dropped down to a position lower than the old one because it is larger than the old one.
The SWA cable is earthed by the armour.
The two current carrying cables inside the armour are long enough to reach the new CU but the armour is not.
So to earth the armour is it OK to tighten a jubilee clip around it and insert earth cable into the jubilee clip so once the jubilee clip is tightened up a secure connection is made.
The SWA cable is inside trunking and the connection with the jubilee clip will be insulated well with earth insulation tape after.
Is this a dodgy cowboy tactic or is this acceptable?
Cheers.

 

[andyb]

No, you shouldn't use a jubilee clip as the pressure could damage the cable.
If it's in trunking why not make the end off with a gland & banjo, then run your earth from the banjo?

 

[jpmiff]

definatley no, chance of crushing the inner cables resulting ina potential insulation problem,short circuit.,

 

[La Poste]

Thanks alot.
I was looking through a senate catalogue at the senate shop and in it was a picture of an SWA joint box, you know the type, a torpedo box and the ends of the SWA armour had been joined with jubilee clips with a cable bridging the gap.
Senate are a large electrical wholesalers.
Dodgy isn't it and that catalogue is available to a very large group of people.
That's where I got the idea.
I thought that maybe if I was very careful and made sure I IR tested the cable afterwards it would be OK.

 

[andyb]

I think that you must of been looking at an underground joint. If so, what looks like a jubilee clip is in fact a spring coil that closes around the armoured but does not tighten.

 

[benji]

why not fit a j/box between cu and swa

yours benji

 

[Guest123]

I'd mount a galv adaptable box in a position where the armour can be correctly glanded into it with correct size gland and earth tag etc. You can then extend from here via crimps or din rail connectors etc via a trunking or conduit or bush & coupler depending on how far you have to go, into your new DB.

 

[UNG]

Thanks alot.
I was looking through a senate catalogue at the senate shop and in it was a picture of an SWA joint box, you know the type, a torpedo box and the ends of the SWA armour had been joined with jubilee clips with a cable bridging the gap.
Senate are a large electrical wholesalers.
Dodgy isn't it and that catalogue is available to a very large group of people.
That's where I got the idea.
I thought that maybe if I was very careful and made sure I IR tested the cable afterwards it would be OK.

Some cable joints use a short piece of tube under the armour and the jubilee clip clamps the armour down onto it provides a much better earth connection in my opinion than the spring coil arrangement and stops the ends or the armour digging into the inner sheath

 

[Spudnik]

Sorry chaps, but the Birkett underground resin kits use jubilee clips for the earth continuity straps.

I have just used 5, repairing some lighting cables destroyed by a mini digger.

Have to say they were a PITA though.

 

[mogga]

the joint kits with jubilee clips normaly have a wee bit of tube for under the armour