S.W.A. Cables in Parallel.

alanblaby:

Grey is usually used as neutral, and black as CPC.


This is basic stuff.

Why?


514.3.2

Z.

alanblaby:


Twin 6mm 3 cores?

It would be far easier to run one 2 core 10mm, or even 1 x 2 core 6mm if clipped direct.

This is basic stuff.

Some wholesalers do not stock two core S.W.A. where 3 core is more popular. The 3 core was sold at the 2 core price.


Would you run a 2 core 6.0mm2 S.W.A protected by a 60 Amp fuse?


Z.


 

alanblaby:

Grey is usually used as neutral, and black as CPC.

Twin 6mm 3 cores?

It would be far easier to run one 2 core 10mm, or even 1 x 2 core 6mm if clipped direct.

This is basic stuff.

Why?


Yes it is the usual Zoom,


One theory is that it is to dissassociate Black from N but in my world if you thing Red Yellow Blue then think Brown Black Grey you`d probably decide for Grey (oversleeved Blue) to be N . In the old R Y B many would use Blue nonsleeved as N because "it is a N colour as in Flexes" but that was a bit nawty not to oversleeve.

In the Br Bk Blu system Black is oft oversleeved Brown as say a switched L with Brown as the Perm L similar to what you`d have done in the R Y B system. (where you be tempted to use Y (oversleeved) as the cpc or in new money the Black as Alan has said

mapj1:

The only problem with cables in parallel is what happens if the current share is unequal - actually a reasonable length helps here, on a short length the details of termination can be significant. So long as both armours, or more accurately any one would operate  the ADS if either cable was spiked, then it is fine. I'd be inclined to perhaps tie the ends together in some way, so they form a pair at the terminals, but that is only so it does not confuse any future person looking at it.

Actually with 6mm and 60A you can have it quite a long way out of balance before it matters - it is a similar problem to the current share on the ring final, and we do not normally fuse the individual limbs there.

Mike.

The two cables are of exactly equal length and supply a consumer unit. 4D4A does not rate 6.0mm2 anywhere near to 60 Amps.


Z.

Zoomup:

mapj1:

The only problem with cables in parallel is what happens if the current share is unequal - actually a reasonable length helps here, on a short length the details of termination can be significant. So long as both armours, or more accurately any one would operate  the ADS if either cable was spiked, then it is fine. I'd be inclined to perhaps tie the ends together in some way, so they form a pair at the terminals, but that is only so it does not confuse any future person looking at it.

Actually with 6mm and 60A you can have it quite a long way out of balance before it matters - it is a similar problem to the current share on the ring final, and we do not normally fuse the individual limbs there.

Mike.

The two cables are of exactly equal length and supply a consumer unit. 4D4A does not rate 6.0mm2 anywhere near to 60 Amps.


Z.

I'll just stick with 514.3.2 and Table 51 ebee. It is easy to identify cable cores as:


a, They are oversleeved by the correct colour sleeving, or tagged by numbers or indicated by coloured tape.


b, They are identified by their connections at terminations by observation.


Z.