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Strange Ring Extension (Read 8877 times)
LSpark
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Re: Strange Ring Extension
Reply #18 - May 6th, 2004, 12:56pm
 
yep thanks for just claryfying that Ray, that was what i understood of connections.
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Re: Strange Ring Extension
Reply #17 - May 5th, 2004, 7:20am
 
[quote author=rabbit_rabbit  link=1083576748/15#16 date=1083736884]ALL connections MUST be within an enclosure - and regardless of voltage SELV as well. So if ya crimp or use terminal strips they MUST be enclosed - ya can get those small plastic boxes (ChocBoxes) from most vendors even SF do them! And the lids snap on and also come with screws to screw down so complies with "need for a tool" bit as well as cable clamps - quite a neat job really. [/quote]

I just learnt something - thanks!

Andrew
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Re: Strange Ring Extension
Reply #16 - May 5th, 2004, 7:01am
 
ALL connections MUST be within an enclosure - and regardless of voltage SELV as well. So if ya crimp or use terminal strips they MUST be enclosed - ya can get those small plastic boxes (ChocBoxes) from most vendors even SF do them! And the lids snap on and also come with screws to screw down so complies with "need for a tool" bit as well as cable clamps - quite a neat job really.

RR
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Re: Strange Ring Extension
Reply #15 - May 5th, 2004, 6:51am
 
[quote author=L.Spark  link=1083576748/0#13 date=1083718243]Andrew, the problem is there is no real protection when you just have crimped and taped connections [/quote]

Understood.

However if the crimped connections were made in the void under the 1st floor then presumably you could leave the crimpe unprotected anyway?

Andrew
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Re: Strange Ring Extension
Reply #14 - May 5th, 2004, 1:52am
 
[quote author=mart_the_spark  link=1083576748/0#12 date=1083694778]"isolate from multiple sources" [/quote] 'isolate elsewhere' still not recommended!!  Shocked
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Re: Strange Ring Extension
Reply #13 - May 5th, 2004, 1:50am
 
Andrew, the problem is there is no real protection when you just have crimped and taped connections, and JB's would technicaly need to be accesable, but they often are not. putting them in a chocbox or a jb is just doing the same required thing.
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Re: Strange Ring Extension
Reply #12 - May 4th, 2004, 7:19pm
 
"isolate from multiple sources"
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Re: Strange Ring Extension
Reply #11 - May 4th, 2004, 7:15pm
 
any box with more than one cuircuit entering should be clearly labled as such
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Re: Strange Ring Extension
Reply #10 - May 4th, 2004, 6:56pm
 
Some useful ideas on connections..not too sure about crimps, as I'll be using single-conductor t+e cable: I think
crimps are best with stranded-core cables.  Having sorted out the various JBs that litter the underfloor space,
I have to re-position and reconnect one 3core+cpc lighting circuit; two 2.5mm2 t+e for the kitchen ring; one 6mm2 t+e
for the kitchen oven/hob and one 6mm2 t+e feed to the garage. As the room above the floor is being converted to an
en-suite bathroom (which is why I lifted the boards in the first place!), I'm a bit limited in where I can put the
connections: they will have to go in a closed compartment which houses the shower pump. No doubt the pump will
blow its pushfit connectors at the first opportunity, so I'll make all the connections in a IP66 box,
using 35A DIN terminals on a rail.

Wil
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mart_the_spark
Re: Strange Ring Extension
Reply #9 - May 4th, 2004, 6:24pm
 
bit worrying, 'perhaps in jb'.....

Surly if you are gonna use through crimps you gona but them in a gewiss box or similar arnt you??

And tape??  Heat shrink sleeve would be your best bed for the non insulated types.
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Re: Strange Ring Extension
Reply #8 - May 4th, 2004, 6:23pm
 
most types of connection are supposed to be accessible however junction boxes rarely are

the things that don't need to be accessible include (there may be others)

crimped joints
soldered joins
resin encapsuated joints
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Re: Strange Ring Extension
Reply #7 - May 4th, 2004, 4:23pm
 
[quote author=L.Spark  link=1083576748/0#6 date=1083675873]well if it's (the crimps) not contained in anything, at minimum tape them all up, i would put in a chocbox regardless tho, JB's arent exactly accesible under the floor are they? so why should chocboxes be? not that im saying its best, but having things accesible just doesnt happen! Roll Eyes [/quote]

I'll be happy to bow to your greater authority on the subject if need be, but my understanding was that choccy blocks were not allowed if they aren't accessible. Whereas crimped connections can be buried.

I agree 100% that the crimps should be taped, or perhaps even better put in JBs. Tape can be a pain in the arse to get undone again in future should that joint ever need to be exposed.

Stanley knives at the ready chaps! Wink

Andrew
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Re: Strange Ring Extension
Reply #6 - May 4th, 2004, 2:04pm
 
well if it's (the crimps) not contained in anything, at minimum tape them all up, i would put in a chocbox regardless tho, JB's arent exactly accesible under the floor are they? so why should chocboxes be? not that im saying its best, but having things accesible just doesnt happen!  Roll Eyes
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Re: Strange Ring Extension
Reply #5 - May 4th, 2004, 12:51pm
 
[quote author=PoorOldWil  link=1083576748/0#4 date=1083656715]Thanks to all for your advice - looks like I have some re-cabling to do! By repositioning a couple of sockets, I can complete the ring using two sets of connections, which I can put above the floor so that they are accessible [/quote]

If ya crimp the cable joins then ya can bury them. It's only choccy blocks that have to be accessible.

Andrew
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Re: Strange Ring Extension
Reply #4 - May 4th, 2004, 8:45am
 
Thanks to all for your advice - looks like I have some re-cabling to do! By repositioning a couple of sockets, I can complete the ring using two sets of connections, which I can put above the floor so that they are accessible.

I lifted a few more boards and found other horrors - the 6mm2 feed to the kitchen hob/oven comes up through the ceiling from the CU below, straight into a JB then on to a second JB where it connects to new cable to the kitchen extension. The force needed to cram two 6mm2 cables into the first JB has broken the box - large bits of plastic left there - and the broken JB 'floating' by the cables Shocked.   No option here but to re-cable back to the CU!

The extension was done by a reputable (?) local builder, but I think the electrics must have been done by the brickie's labourer in his tea-break!
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Re: Strange Ring Extension
Reply #3 - May 4th, 2004, 1:31am
 
and failing that!, get a spark in to do it mate, you could risk electricution quite easily handling this yourself, especialy with JB everywhere! - up to you!  Undecided
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Re: Strange Ring Extension
Reply #2 - May 3rd, 2004, 11:30am
 
regs require junction boxes to be accessible though in reality they very rarely are

if possible remove the jucntion boxes completely and replace all cables comeing out from the pair of junction boxes with 2 new cables to give one continous ring with no junction boxes

failing that remove one cable from the main ring to the pair of junctino boxes and one cable from the mini ring to the pair of junction boxes and run a new cable between theese sockets to give a proper ring but with the junction boxes left in

failing that remove one cable from each or the pair of junction boxxes and join them with mroe junction boxes and cable but i really wouldn't wan't to introduce so many junction boxes
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