Discuss size of main tails in flats in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

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Hi I think because of the termination of this type of cable in consumer units can be dangerous and with so many cowboys about would never reccommend this type of cable !
 
Hi I think because of the termination of this type of cable in consumer units can be dangerous and with so many cowboys about would never reccommend this type of cable !

Very true indeed, but 25mm SWA i think is just as bad as it is very difficult to work into a CU.

Still, each to his own i suppose.
:)
 
In 30 years I have never ever installed concentic cable, all I have ever done is take them out. That includes domestic, commercial and industrial. In all circumstances I would not use concentric cable. The definitation is blured somewhat, a concentric cable is by defination having a common centre. Which for intense and purpose is not allowed within usual scope of the regs. You cannot distinguish neutral earth within all given circuits, they are all as one.

From a supply it is allowed, but no sub circuits should be allowed, it is a very dangererous road to go down.

At all cost, no matter what bad information you get here should concentric wiring be used on the consumer side

lol, 25mm are shoe laces try terminating 350mm, into a poxy chinese isolator...half the price 10 times the trouble

Chinese say no splitter box needed, bull**** it is complete impossible without splitter, assuming 350mm
 
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You cannot distinguish neutral earth within all given circuits, they are all as one.


I think the difference between neutral and cpc is fairly obvious:


Split concentric cable to BS7870


But hey, fair enough.

I have and am still using the above with all the right protection and havent had any problems at all.

As for the 350mm, we are talking about a domestic consumer unit, not an industrial or commercial installation.
 
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Hi


just read your reply, this would only work in a new build and only if the DNO would take reasonability for the riser which they no longer do. The guy said the meters are on the ground floor which the DNO rarely move, they limit there cable above ground to a minimum. You can not install a rising main and just tap off, as the whole block would be tapping off. You are talking about 6 flats to get consumer side power in domestic supply, concentric is fine, you could use double insulated if the containment is very good. Riser and twin earth not practical. Paul are the flats private or public sector?
Regards
 

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