Mains box to Consumer unit SWA or tails?

[grandfortune]

HI all,

usually take tails form a MEB box to consumer unit no matter what the length as long as i can get the 50mm depth, builder has told me he wants it in SWA, ive told him its pretty much impossible to terminate it right if i use SWA also i run up the cavity with the tails and there is no way i can get SWA up there so will have to run inside up the wall which i hate doing, what do you guys do if using SWA??

Cheers
Grand

 

[davesparks]

Touché

Thinking about it further I wonder if GRP is non combustible? If so then it could be argued that it does comply.

 

[Ian1981]

Thinking about it further I wonder if GRP is non combustible? If so then it could be argued that it does comply.

It's a fair point.
I wonder if any tests have been carried out.
After all there's electrical equipment installed inside so would it have to have some flame retardant qualities?

 

[suffolkspark]

I've put metal switch fuses in meterboxes before but used the protek ones as there not too big, gland the swa into it then gland it into the metal ccu if possible, if its in a cupboard id just bring the armoured out and go surface into the bottom of the ccu, provide a pot of white paint if the customer doesn't like the look of it

 

[suffolkspark]

.

 

[westward10]

Thinking about it further I wonder if GRP is non combustible? If so then it could be argued that it does comply.

As I said in #27 it is likely to char and not propagate any flame. These materials can have differing make up some of which do have fire resistant properties.

 

[davesparks]

As I said in #27 it is likely to char and not propagate any flame. These materials can have differing make up some of which do have fire resistant properties.

I'm referring to the metre box which is made of GRP (fibreglass)

 

[Ian1981]

It maybe argued that the meter cabinet is outside the scope of bs 7671 so can't be used in the sense of a non combustible enclosure as bs 7671 sees it, then its maybe a departure which goes back round to what dave said but only slightly different reasoning.

Anyone still listening zzzzzzzzzzzz

 

[davesparks]

If I hadn't lost the picture of the one I did before the non combustible rule came in then I wouldn't have posted that one.
Plus the KMF wouldn't have been upside down.

 

[bigspark17]

I think kmf are ok in a surface mount DNO box outside the property but shouldnt be used in a recessed one as its sitting inside the cavety of the house so as electricians must use the best advice giving to us by bs7671.

 

[buzzlightyear]

sorry I think the lads have runner away with this, he only wants to know.
if he can use SWA concentric wiring. and the best way around it

 

[buzzlightyear]

I bet he has gone to bed with a headache after reading that lot.

 

[davesparks]

I've finally found some of the pictures i was looking for earlier. This job was done in early 2015 so had a completely legitimate plastic CU fitted.

This is what I mean about the flush box behind the CU

And this is the supply end in progress, I can't find any pictures of it finished but you get the idea, and the KMF is the right way up!

 

[Ian1981]

I've finally found some of the pictures i was looking for earlier. This job was done in early 2015 so had a completely legitimate plastic CU fitted.

This is what I mean about the flush box behind the CU
View attachment 37374

And this is the supply end in progress, I can't find any pictures of it finished but you get the idea, and the KMF is the right way up!

View attachment 37375

Ferrous box with live and neutral going through separate holes?

Edit going through timber or something else rather? thought I'd caught you out dave

 

[buzzlightyear]

no shroud on SWA covering the brass locking nuts .

 

[davesparks]

Ferrous box with live and neutral going through separate holes?

Edit going through timber or something else rather? thought I'd caught you out dave

It's a piece of paxolin,