How to wire a JB

[ColJack]

if it's a T+E there IS no strapper. you just have switched live and live..
can't do 2 way switching with just 1 T+E, unless you decide to use the earth as a strapper and break the regs.. ( which is what they did at my house.. bad council sparkies.. )
View media item 13174yes that's the earth in a single and earth sleeved red and used as a strapper..

 

[dunny123]

don't you mean 3c+e dunny

so you mean b*****d 2 plate wiring?

live feed to one switch, 2 strappers between and a switched live back ( 3 core, labled in the WIKI as "cable saving method" )?
presumably with a live and neutral feed and a switched live and neutral to the light also?

yep, have seen it on a bungalow before. Either method of 2 way wiring is viable.

T&E = Three core & earth. My method was 3core&E from each switch to the JB, plus a loop in with neutral, and a switch live and neutral out to the luminaire. Obviously not using cpc's as anything other than cpc's !!

 

[mikej2005]

A more common practice seems to be to drop all the cables down to the switch and join the necessary wires in there using chock block.

The lights are wired that way in my place and this can make things tricky when replacing light switches - I found swapping a normal switch for a dimmer difficult, for example, because dimmers are often deeper than a standard switch and there's not much room for maneuver when there are three cables terminating tightly in a 16mm backbox that's been nailed to a wooden joist.

Because the lights are wired in this way, when it's been necessary to do work on the lighting circuit such as relocating switches, I've taken the oportunity to pull all the cables back up from the switch and into the loft and use junction boxes up there, making it much easier to drop a single cable down to the new switch.

As for wiring them, I tend to do it like the OP does - ie. one cable at a time, cutting each core to the right length and lightly tightening the screw terminals before moving onto the next cable.

 

[Spark123]

When joining wires in there I prefer a 25mm box as a minimum

 

[comms]

A sample of some JB's

First one a 1950ish jb supply cable is lead sheath & feeding a batten fitting above a bathroom sink
http://i83.photobucket.com/albums/j293/gazjothomas/1950sjb230vbellwirelighting.jpg

Second is a JB inside a large barn thats hired out for weddings & functions. JB added by sites maintenance man to supply 2x floods on exterior wall.
http://i83.photobucket.com/albums/j293/gazjothomas/animalfeedstoreroomlightingjbwithno.jpg

Last one I fitted on friday for a coach light & remote pir.
http://i83.photobucket.com/albums/j293/gazjothomas/ashleylightingjb.jpg

 

[VanSolo]

I have found the best method for me is to strip each T&E cable, cut the individual cores to suit its entry point, and terminate one cable and one conductor at a time, lightly tightening the screws, and then adding each additional cable in the same manner. I find if I try and put two or more cables in a once it gets too fiddly and it takes longer overall, and doesn't end up as neat.

I do mine this way, always have done.
Don't like using the things though, I avoid them if at all possible.