Underground joint kits

[omega]

Hi, just wondering if anyone can clarify the situation regarding underground resin joint kits.
I'm in the process of connecting an existing 3 core (R,Y,B) 16mm armoured cable which (unbelievably fed a garden shed?), to a new B,B,G 3 core 16mm armoured. Iv'e just bought the house and built a workshop so armoured needed lengthening. Two questions really, firstly iv'e had two different pieces of advice, one that i should energize the cable immediately after pouring the resin and the other saying nothing about energizing, just leave cables for 2 hours before
moving them, does it just depend on which kit i use? Second question is really just asking for confirmation regarding colours. Am i correct in thinking Red/Brown-Yellow/Grey- Blue/Black. Obviously they will be marked with correct colours at terminations. Cheers all, hope this wasn't too long winded, just thought it best to give a clear picture of the situation.

 

[markc123]

...if we hear on the news anytime soon that half the tarmack has been removed at rhinefield house...we know gypo's read this forum lol

 

[omega]

Thanks to all the decent guys out there who are helpful with there advice. Just to let Kas1 know, i'm fully part p qualified and have been for a couple of years now and done plenty of work with no problems. Never done a resin joint so just wanted to confirm everything. As for the colours, it was the fact that i saw a thread on the forum from someone saying use the yellow core as the earth. I'm fully aware of the harmonised colours but thanks for your help anyway!

 

[markc123]

Now this could get me in abit of trouble from some of the lads on here...

When using 3core on single phase...brown black grey, i always use brown (obviouslly live) black as neutral (sleeved) and grey sleeved as earth. I was told by a decent sparky i know, that he once read in the wholesalers that under Part-P when doing this, ure supposed to use black as earth and grey as neutral. Im guessing this is complete nonsense? Or is that actual fact, if so i've been doing it wrong forever :laugh3:

I also heard the same thing from a kitchen fitter that had done the part-p course. Although i realise i'm gonna get grief for listening to a kitchen fitter, 2 people with the same story made me think it was true. I know its completley trivial really, but just wondered out of curisoity. Even if im wrong, using black as earth too me is completley stupid.

 

[RyanCheetham]

I use grey as neautral and black as earth, i was told its best practice

 

[markc123]

And thats a 3rd person thats confirmed now. What do i know about electrics haha!

Deary me, if im not too set in my ways ill try and change. scouts promise.

 

[Guest55]

Sorry you wouldn't get one I can assure you lol

and where is that you work thats so f'in elite ?

 

[Guest55]

oh , and 2 pack resin is electrically inert so can be energised straightaway.

 

[RyanCheetham]

To be fair mark as long as its sleeved with harmonised colours i dont think it really matters which conductor does what

 

[markc123]

Yeah i know it doesn't matter - it's just trivial. Just something i was completley unaware of until recently. Still find it slightly strange though how black can ever be earth, but thats just me i suppose lol.

 

[omega]

Seems everyone's a little confused. Iv'e done my part p and the only info given was that of Red,Yellow,Blue is replaced by Brown, Black, Grey. It was never mentioned as to which colours should be used for single phase L/N/E. I suppose that's because they automatically
assume your going to use the Brown, Blue, Green/Yellow cable, that's my take on it anyway

 

[Guest55]

To be fair mark as long as its sleeved with harmonised colours i dont think it really matters which conductor does what

the reason bs7671 asks you to use black for earth on 3 core is to break the traditional association of neutral formerly being black.
imagine breaking into a cable midway to make a connection , such as the underground jointing in this thread , it matters a great deal as you not going to see any coloured sleeving in the middle of a run.

 

[omega]

The reason I asked about the resin (energize or not) is that iv'e got two joint kits, i was given one by a mate but it turned
out to be for 10mm cable. This kit states leave for 2 hours (no mention of energizing). I then bought a 16mm kit and the instructions state
to energize immediately after pouring resin, that was the reason behind the question. I suppose i should just follow the instructions but
obviously that's what brought about the question, 2 different sets of instructions, hence the question, do different resins act differently?

 

[KAS1]

Before the harmonized colours were introduced it has been common practice on many many construction sites all over this country to use a four core SWA cable for 3 phase motors (even other supplies that require no N) with the black core used as an earth(sleeved green/yellow) so as to have an internal cpc in addition to using the SWA, maybe on larger SWA this would not always be the case due to cost, having said that I've seen it in the used (4 core) on I think it may of been 70mm parallel feeders, also in mining industry as to allow normal SWA on cables

Yeah i know it doesn't matter - it's just trivial. Just something i was completley unaware of until recently. Still find it slightly strange though how black can ever be earth, but thats just me i suppose lol.

 

[RyanCheetham]

Very good point biff, i shall remember that

 

[markc123]

the reason bs7671 asks you to use black for earth on 3 core is to break the traditional association of neutral formerly being black.
imagine breaking into a cable midway to make a connection , such as the underground jointing in this thread , it matters a great deal as you not going to see any coloured sleeving in the middle of a run.

Can't understand why they would want to break the traditional association of neutral formerly being black.

But for the rest of what you've said biff, that makes perfect sense now to be fair. I may have to get out of my old ways after all. Can be my new years resolution.

Mark - black is now earth on single phase. lol! Anyone else use neutral as black and earth as grey? or am i the only clown lol how unprofessional am i.