t&e and singles

Hawk · Aug 27, 2015

Is there anything wrong with having t&e mixed with singles on a ring circuit? For example a kitchen ring with conduit linking everything. The 2 legs coming from the garage would be t&e as they will be clipped to joists. But as everything in the kitchen will be conduit it would be easier to pull singles than trying to pull 2 t&e cables down a conduit. Can't see anything in the regs advising against this.

telectrix · Aug 27, 2015

how are you connecting the T/E to the singles? arew you using conduit as cpc or a separate conductor. more info needed to give definitive reply.

Hawk · Aug 27, 2015

T&e to the first and last socket then singles for the loop. All pvc conduit

Hawk · Aug 27, 2015

So single brown, blue and earth. The t&e will connect to the singles in the first and last socket on the ring.

J.C.E · Aug 27, 2015

if its plastic conduit I am assuming there is a separated cpc single being used- so along as you have ring continuity on r1 rn r2- I can't see it being an issue?

telectrix · Aug 27, 2015

can't see any problems as long as everything is done to regs. and cont. tests are ok.

davesparks · Aug 27, 2015

I know this may sound like a daft question, but what size single will you use?

telectrix · Aug 27, 2015

i've got some 7/029 singles he can have. it's red/black, so should blend in nicely. :computer:

davesparks · Aug 27, 2015

telectrix said:
i've got some 7/029 singles he can have. it's red/black, so should blend in nicely. :computer:

As an apprentice when the colour change happened I had the fun of clearing all of the old colour cable out of the stores. Along with the usual array of SWA offcuts and half drums of singles there were some imperial singles, a complete drum of lead twin, TRS and VIR hiding away at the back of the stores.
That company never threw anything away!

Hawk · Aug 27, 2015

Straight to the scrap man Dave? Lol. And to answer your question 2.5mm singles + t&e

davesparks · Aug 27, 2015

Hawk said:
Straight to the scrap man Dave? Lol. And to answer your question 2.5mm singles + t&e

No comment

Not a 1.5 single for the cpc then? Won't that make your calculations a bit more tricky and your test results a bit harder to interpret?

Gazthesparky · Aug 27, 2015

I've done that several times ran most of the ring in t&e and then dropped a few links in , in conduit and singles. Done it a few times when wiring sockets in a conservatory and having to span a doorway. Nothing wrong with it aslong as all singles are enclosed in containment

DuaneMHunt1976 · Aug 28, 2015

I'm not sure how to word this...
Cables in trunking over head (maybe not the read word to use but about that high) need to be tied down, in such a way that when if the trunking melts in a fire, that the cables don't hang around and catch people trying to leave. Also they maybe still live.

https://www.google.co.uk/url?sa=t&source=web&rct=j&url=http://www.ifpo.org.uk/downloads/assemblage3presentation2014.pdf&ved=0CF4QFjAEahUKE*wjk-aDUmcvHAhUMm9sKHZEuCBI&usg=AFQjCNF-E8-iH_Y_ZVDD1szJrYX2ldH6TQ&sig2=V4nA-xwrTnb9y9PVvCzdsw

7029 dave · Aug 29, 2015

DuaneMHunt1976 said:
I'm not sure how to word this...
Cables in trunking over head (maybe not the read word to use but about that high) need to be tied down, in such a way that when if the trunking melts in a fire, that the cables don't hang around and catch people trying to leave. Also they maybe still live.

https://www.google.co.uk/url?sa=t&s...VDD1szJrYX2ldH6TQ&sig2=V4nA-xwrTnb9y9PVvCzdsw

Galvanized saddles, seen it done on an new fire alarm installation.

Gazthesparky · Aug 29, 2015

DuaneMHunt1976 said:
I'm not sure how to word this...
Cables in trunking over head (maybe not the read word to use but about that high) need to be tied down, in such a way that when if the trunking melts in a fire, that the cables don't hang around and catch people trying to leave. Also they maybe still live.

https://www.google.co.uk/url?sa=t&source=web&rct=j&url=http://www.ifpo.org.uk/downloads/assemblage3presentation2014.pdf&ved=0CF4QFjAEahUKE*wjk-aDUmcvHAhUMm9sKHZEuCBI&usg=AFQjCNF-E8-iH_Y_ZVDD1szJrYX2ldH6TQ&sig2=V4nA-xwrTnb9y9PVvCzdsw

When I was referencing using conduit to span doorways in a conservatory I meant that I had dug up the floor as it had dwarf walls and there was no other way than go under the floor. But yes I see your point you do have to have fire resistant cable supports over exit doorways