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Topic Title: thru crimps
Topic Summary: permanant ?
Created On: 29 April 2013 10:21 PM
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 29 April 2013 10:21 PM
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Ampman

Posts: 1029
Joined: 06 February 2006

Got called out to a house were a man had drilled a cable in wall half way up wall .

Temp repair for now .

Options .

Through crimps & tape .

Rewire leg and chop wall ceiling to floor level and try and get chipboard floors up .

Customer don't want box blank plate half way up wall .

Are thru crimps classed as permanant ? Where in regs can u find it ?
 29 April 2013 10:33 PM
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Fm

Posts: 743
Joined: 24 August 2011

Through crimps are classed as permanant.
Tapes a bit rough though
Terminations should be in an enclosure,many may use heat shrink etc. stagger joins.
 30 April 2013 12:29 AM
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SKElectrical

Posts: 910
Joined: 01 February 2009

http://www.theiet.org/forums/f...key=y&keyword1=crimps

Ohh don't get Martyn started. I'm anxious every time I have to join a cable since his posts - in fact I don't think I've through crimped since!
I'd use connector blocks but then the OCD in me worries about their ratings of 5A, 15A, 30A , as opposed to nominal 60898 ratings!

If you do joint out in the wall, be sure to wrap with self amalgamating tape, available from screwfix. And then overwrap with insulation tape.
 30 April 2013 07:39 AM
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Rulland

Posts: 481
Joined: 11 April 2008

If its rfc, can you get to cables above or below, whichever way they run, jb and convert leg to radial-assuming its a dsso that it's feeding.

-------------------------
Those who make no mistakes do very little work!!......
 30 April 2013 09:16 AM
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daveparry1

Posts: 6328
Joined: 04 July 2007

Through crimps, or solder (better) and heat-shrink and then self-amalgamating tape,

Dave.
 30 April 2013 02:34 PM
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AJJewsbury

Posts: 11686
Joined: 13 August 2003

Are thru crimps classed as permanant ? Where in regs can u find it ?

I think they're classed as joints made by compression tool - reg 526.3 (iv).

I'd presume that crimped joints still joints and so subject to 526.5 - so a hole in plaster on a brick wall that's then plastered over probably complies with the non-combustable building materials option of 526.5(iii), but you'd probably need a proper box of some kind in say stud partition wall.

- Andy.
 30 April 2013 10:08 PM
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leckie

Posts: 1960
Joined: 21 November 2008

The joint is made by compression so complies. But are they any good? Half the time I find that solid cores do not pass the "tug test". What do the manufacturers say? I bet they say that whether they are solid or stranded, crimps are ok.?

I hope push connectors, wago,etc, prove reliable over time.

Just think, in the 1950's it was pretty normal for cores to be twisted together and wrapped in cloth based insulation tape. OMS told me he remembers it happening.

Joking OMS!
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