The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Industrail Control Panel bonding per 409.108
by sparkyinak
Yesterday at 06:29 PM
Calling all Non-US members!! (Non-US only)
by aussie240
12/07/16 02:39 AM
Photo Upload Tutorial
by DanK
12/06/16 11:35 PM
Sprinklered equipment 26-008
by bigpapa
12/02/16 04:24 PM
On Delay Relay with Auto Reset
by Potseal
12/01/16 09:59 AM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 13
HotLine1 10
sparkyinak 9
Texas_Ranger 8
Potseal 6
Who's Online
0 registered (), 200 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Page 1 of 2 1 2 >
Topic Options
Rate This Topic
#133343 - 07/18/02 11:07 AM How not to wire a junction box
pauluk Offline
Member

Registered: 08/11/01
Posts: 7693
Loc: 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!





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

Top
Test Equipment:

Large Selection of Test Equipment For Electrical, HVAC, Test & Measurement
Large Selection of Test Equipment For Electrical, HVAC, Test & Measurement

#133344 - 07/20/02 03:48 AM Re: How not to wire a junction box
sparky Offline
Member

Registered: 10/18/00
Posts: 5545
Paul,
would i assume the norm being that JB's be secured, and the wires made into them before being stripped?

Top
#133345 - 07/21/02 03:06 AM Re: How not to wire a junction box
pauluk Offline
Member

Registered: 08/11/01
Posts: 7693
Loc: 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... ).

[Edit] Pic copied from other thread:





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

Top
#133346 - 07/22/02 02:50 PM Re: How not to wire a junction box
sparky Offline
Member

Registered: 10/18/00
Posts: 5545
ah...much better!

Top
#133347 - 07/22/02 08:12 PM Re: How not to wire a junction box
poppa Bill Offline
Junior Member

Registered: 01/14/02
Posts: 5
Loc: 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).]

Top
#133348 - 07/23/02 02:47 PM Re: How not to wire a junction box
pauluk Offline
Member

Registered: 08/11/01
Posts: 7693
Loc: 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).]

Top
#133349 - 10/12/02 07:09 PM Re: How not to wire a junction box
Trumpy Offline

Member

Registered: 07/05/02
Posts: 8540
Loc: 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

Top
#133350 - 10/12/02 07:56 PM Re: How not to wire a junction box
Bjarney Offline
Moderator

Registered: 04/10/02
Posts: 2561
Loc: 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.

Top
#133351 - 10/13/02 02:44 AM Re: How not to wire a junction box
Belgian Offline
Member

Registered: 10/10/02
Posts: 177
Loc: 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.

Top
#133352 - 10/13/02 09:45 AM Re: How not to wire a junction box
j a harrison Offline
Member

Registered: 05/22/02
Posts: 112
Loc: 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

Top
Page 1 of 2 1 2 >



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals