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#133343 - 07/18/02 02:07 PM How not to wire a junction box  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
From the troublesome house, this is a junction box I chopped out during the work. This is not the approved way of wiring British junction boxes!

[Linked Image]

[Linked Image]

As you might expect, the box was not fixed to anything and the cables were hanging loose.


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#133344 - 07/20/02 06:48 AM Re: How not to wire a junction box  
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,306
Paul,
would i assume the norm being that JB's be secured, and the wires made into them before being stripped?


#133345 - 07/21/02 06:06 AM Re: How not to wire a junction box  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
Yes, the box should be secured and the cable sheath should extend into the j-box. These boxes are designed to take up to four cables.

The white j-box pictured elsewhere shows how it should be done (if I do say so myself... [Linked Image]).

[Edit] Pic copied from other thread:

[Linked Image]



[This message has been edited by pauluk (edited 07-21-2002).]


#133346 - 07/22/02 05:50 PM Re: How not to wire a junction box  
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,306
ah...much better!


#133347 - 07/22/02 11:12 PM Re: How not to wire a junction box  
poppa Bill  Offline
Junior Member
Joined: Jan 2002
Posts: 4
Medicine Hat Alberta Canada
Hey that reminds me of a J.B. I took out of a celing in a mobile home. They uncovered it for me because he knew it was there.It was burnt looking outside of box. I soon discovered they had joined a peice of copper wire to aluminum. I politely told him he was lucky to be able to call me.
if a fire had started in the middle of night. He was saved because he didn't forget the cover on the J.B.

[This message has been edited by poppa Bill (edited 07-22-2002).]


#133348 - 07/23/02 05:47 PM Re: How not to wire a junction box  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
I've found plenty of these j-boxes buried in walls as well. People seemed to find the darndest places to hide them!

The problem of aluminum (or aluminium as it's called over here) wire is something we've largely avoided, as it never caught on for smaller cables in domestic use.


[This message has been edited by pauluk (edited 07-23-2002).]


#133349 - 10/12/02 10:09 PM Re: How not to wire a junction box  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,211
SI,New Zealand
Paul,
Just a short note on aluminium wiring,
I was recently talking to a sparkie who done
his time in the UK during the 1960's and he reckoned that someone over there must have had an aluminium fetish, as he was saying that all of the cables, conduit and a few other things were all manufactured from good
old Al,is some of this wiring still found in older installations?,the aluminium conduit must have been a shocker to work with, ever tried to straighten a bent length
of aluminium?.


Let's face it, these days if you're not young, you're old - Red Green grin

#133350 - 10/12/02 10:56 PM Re: How not to wire a junction box  
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
Termination characteristics of aluminium conductors have been improved with "8000-series" alloy compounded with a small amount of iron. The alloy is almost universal for inside [building] wiring left of the pond, but not used much in utility [site] applications. Part of the reason for that is that utilities typically use 100% hydraulic-compressed terminations and splices, which are as close to bulletproof as can be had. OTOH, for inside wiring in the US, setscrew-type terminations are unfortunately still quite common, and are truly P-O-S items, regardless of the insistence of many connector salesmen. Sadly, after 50 years, the politics of building codes still do not prohibit them.

As for raceway, I used to work in a winery that used 110% threaded-rigid aluminum conduit. Its coefficient of expansion is so great that straight runs firmly secured on pipe racks would "snake" quite noticeably [or tear itself apart] during temperature extremes.


#133351 - 10/13/02 05:44 AM Re: How not to wire a junction box  
Belgian  Offline
Member
Joined: Oct 2002
Posts: 177
antwerp
Here we don't use j-boxes in new, residential installations, when the wires are built IN the walls. Whenever we do use them (industrial instal, garages, cellars), then they have 2 b accessible.
We wire from one switch to the other with L,N & PE.
Our J-boxes are much more user friendly.
I find the whole british system very unatractive for electricians to work with. Here we have much better material and more user-friendly.


#133352 - 10/13/02 12:45 PM Re: How not to wire a junction box  
j a harrison  Offline
Member
Joined: May 2002
Posts: 106
southampton, england
Belgian,
I agree that some of the ways we have over here in England leave a lot to be desired, but it could be worse, they could start regulation on who can install electrical equipement ( I wish )
some of our practices might appear to be a bit odd, but as an electrician of a few years i dont see them as ( until i joined ECN that is )
Pauluk mate,
are you originally from Blighty or are you still here, and why ?

John H


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