How much insulation is needed leaving back box?

[twist]

Hi, I'm replacing a damaged cable to my shower and can't make a good job of getting both 10mm^2 cables in the old DP switch box without stripping the external PVC way back to promote flexibility.

The thing is these are massive cables and the one at the bottom comes from the top and vice versa, the opening at the back barely permits the two entry without needing to cross over.

Should I replace the switch or let cable leave without full outer insulation?

 

[DaveyD]

http://www.amazon.co.uk/Crabtree-2167-Shower-Switch-50amp/dp/B0048SEAAG

 

[Marvo]

Is this a trick question? It sounds like your a victim of bad planning if the cables cross, can't you rearrange them so they can enter the box in an orderly fashion? Stripping the insulation way back to make them more flexible would not be a good idea. Maybe a photo would give us a better idea of the problem.

 

[twist]

No trick, it's a wall switch, and now the cable is cut, it will forever be a wall switch and not a ceiling switch. I like it high, outside the shower room, and the shower higher still, safe from the torrents.

 

[PEG]

If it's safe you like it,you need to leave as MUCH insulation on as you can manage.Re-arrange to accomodate this.:teeth_smile:

 

[twist]

I think I'd like more room and a bigger switch, like this, Toolstation > Electrical > White Flat Plate > White Flat Plate Switch Tall Twin

Would I just fit a double socket pattress box behind it? What's this "twin" business? Looks like a single switch, only taller.

Answered: http://www.screwfix.com/p/marbo-45a-dp-cooker-shower-switch-with-neon-white/64451

 

[GLENNSPARK]

you want to watch them twin pairs of feet in shower cubicles....

 

[twist]

As long is doesn't require twin showers eh?

 

[Guest55]

dont tell me your trying to terminate 2x 10mm's in a 1 gang box ??
lol no wonder your struggling
yes , use a double switch plate in your link with a 47mm 2 gang box.

 

[micknew]

DIYer, best not advise in case he kills someone

 

[twist]

Ok, was going to do that.

I DIY I die, so no, but I repair and replace.

Seems most wall mounted DP switches are for cookers, anyone know if they will give the requisite 3mm contact separation and which standard I need to look for to ensure this? Or just buy Crabtree and trust in quality?

 

[micknew]

Thought so!

 

[twist]

Thought nothing.

 

[Plonker 3]

As long as it comes with a BS number or flag on it then it will be fine for what you are using it for.

 

[micknew]

Thought nothing.

Thought so, not clever or intelligent enough to work on a shower circuit.

 

[GLENNSPARK]

its about time these brain dead tw&ts left us alone in here....
stop askin bloody questions on how to do stuff...
go get an electrician in....

 

[Silly Sausage]

its about time these brain dead tw&ts left us alone in here....
stop askin bloody questions on how to do stuff...
go get an electrician in....

Oh how I love Glenn's replies!!!

 

[micknew]

Too many members want to show how much they know to DIYers.

 

[guest119]

Yea well, what happens when the 5wws start helping out the diyers?

 

[GLENNSPARK]

Yea well, what happens when the 5wws start helping out the diyers?

wrong....
when the DIYers start helping out the Electrical Trainee....

 

[Engineer54]

Ok, was going to do that.

I DIY I die, so no, but I repair and replace.

Seems most wall mounted DP switches are for cookers, anyone know if they will give the requisite 3mm contact separation and which standard I need to look for to ensure this? Or just buy Crabtree and trust in quality?

Hmmmm, ....so what sort of contact gap would you expect from a DP 45A cooker switch then??

 

[Geordie Spark]

its about time these brain dead tw&ts left us alone in here....
stop askin bloody questions on how to do stuff...
go get an electrician in....

Don't you hold back there Glenn ............. just tell it like it is ... :wink_smile:

 

[GLENNSPARK]

Don't you hold back there Glenn ............. just tell it like it is ... :wink_smile:

i`m just tired of it all the time..
like bloody stupid questions...

 

[Geordie Spark]

i`m just tired of it all the time..
like bloody stupid questions...

Keep calm and carry on.

 

[Octopus]

Its about time Dan created a new catagory for some members - DIY Bodger??

 

[twist]

Hmmmm, ....so what sort of contact gap would you expect from a DP 45A cooker switch then??

I don't know, I'm replacing my shower.

Its about time Dan created a new catagory for some members - DIY Bodger??

I have a 45A switch and discover I cannot use 10mm^2 cable in it. It seems like the regs re CSA vs Imax are bodged.

 

[telectrix]

you've had your answer. use a double 47mm back box and an appropriate switch.

 

[kingeri]

................

 

[Engineer54]

you've had your answer. use a double 47mm back box and an appropriate switch.

Originally Posted by twist

Originally Posted by Engineer54
Hmmmm, ....so what sort of contact gap would you expect from a DP 45A cooker switch then??

I don't know, I'm replacing my shower.

Yep, that looks decidedly like a cooker/heater switch, without the engraving of ''COOKER'' or HEATER'' on the faceplate!! Jesus, some mothers do ave em alright!!

 

[telectrix]

well, if that was outside my bathroom, i'd not immediately think it was for the cooker.

 

[Silly Sausage]

well, if that was outside my bathroom, i'd not immediately think it was for the cooker.

If you came home tanked up night you might wonder why your rice won't boil in that pan with a lid!

 

[telectrix]

well it won't boil if you put it in the bath. don't eat rice anyway. curry & chips for me.

 

[ruston]

well it won't boil if you put it in the bath. don't eat rice anyway. curry & chips for me.

Curry and chips on the bathroom floor etc isn't that unusual , is it?

 

[telectrix]

not if you drink that chemical muck called lager or smoothflow and miss the pan when you throw it all up.

 

[Silly Sausage]

well it won't boil if you put it in the bath. don't eat rice anyway. curry & chips for me.

We're not feeding the 5000 here!

Got a mate who came downstairs one morning to find teeth marks in his plastic fruit.
He also came home one night with a bag of bacon rinds he found in a bin and proceeded to cook them up and eat them.
I love beer drinking! :smilielol5:

 

[Octopus]

I don't know, I'm replacing my shower.



I have a 45A switch and discover I cannot use 10mm^2 cable in it. It seems like the regs re CSA vs Imax are bodged.

Why not? Who says?

 

[telectrix]

bigger cable= bigger enclosure.... ssimplesss.

 

[Octopus]

bigger cable= bigger enclosure.... ssimplesss.

The OP is probably trying to use a 16mm surface box!

 

[Geordie Spark]

well, if that was outside my bathroom, i'd not immediately think it was for the cooker.

Some of us enjoy a hot meal whilst taking our bath.

 

[Silly Sausage]

Some of us enjoy a hot meal whilst taking our bath.

You finally caught her then?