Disconnecting circuit in CU - best practice?

[Deuce]

Hi all,

I'm in the process of renovating the bathroom. There is an electric shower I have removed and won't replace. The cable is not practical to remove.

To make this redundant circuit safe, what is the best way to cap off in the CU? I plan to label it too, both in the CU and at the other end in the loft. This end originally ran to the isolator in the bathroom, which is now removed. The final couple metres cable from the isolator to where the shower was, is deep in the wall so can this just be cut back and buried?

Someone else said to terminate the old cable to earth bus in the CU but I've never actually seen that done before, having looked at many CUs in older properties with redundant circuits..

 

[DPG]

Out of interest what are the white cables for, as its a newer CSU I guess its to do with the breakers?

I'm assuming you mean the ones on the RCBOs??

 

[Intoelectrics]

I am waiting

You could have at least folded the live conductors so they were all the same height

 

[Squid]

Fly leads from the rcbos.

Should have spaced them out to correspond with the placing of the neutrals.......... ;o))))))

 

[Wilko]

I am waiting

Ok, I'll start - phone call to Tech Support "so you connected red and black together, then it exploded?"
Edit - ha, I'm 4th in line
Very nice and neat BTW

 

[telectrix]

neat board westie. i'd have used a BG with compact RCBOs. no earth flyleads either.

 

[sparksburnout]

Someone is going to mention using 16mm tails soon.....

 

[westward10]

25.0

 

[telectrix]

Someone is going to mention using 16mm tails soon.....

and what's wrong with 16mm tails. you ever seen any burnt out?????

 

[Deuce]

and what's wrong with 16mm tails. you ever seen any burnt out?????

I never really understood this...

So I guess, main fuse is often 100amps, which I appreciate exceeds the 16mm tails - which can probably safely handle around 80-90 amps as they're not enclosed in an outer sheath. But why were they ever used with 100a fuses? They could never be rated to comfortably handle the current required to blow the fuse (in theory at least).

Why were they not always 25mm with 100a fuse? Genuinely interested - as you can probably tell, I'm not a domestic spark lol.

 

[telectrix]

over the years, the current draw in a domestic has increased due to hi power showers, cookers hot tubs, etc. back in the 60's never even seen more than 20A. even these days, with diversity, rare you see more than 40A at any one time. 16A tails are more than capable of handling 99%of installations, even on the odd occasion where > 80A is drawn for a short period.

 

[Midwest]

But some smarty pants DNO might not upgraded your 60A supply to 100A, without upgrading the tails. What I find comical, is their insistance on the upgrading of tails between meter & CU, but the head to meter can stay as 16mm!

In most of CU changes I did, the old tails were too short to reconnect anyway, so the tails had to be replaced.

 

[sparksburnout]

and what's wrong with 16mm tails. you ever seen any burnt out?????

Nowt. Just done one the same, 16mm good old UK Red and Black. Was just saying.....(was an 80A fuse, well that's what it said on the label)

 

[westward10]

When I took the old board off the new one wouldn't cover the patch of old paintwork so I asked if they happened to have any of the new paint left, they did so a bit of redecorating took place.

 

[sparksburnout]

25.0

Oh yes sorry, must be my eye's. Def 25.

 

[mattg4321]

Looks like a neat job @westward10

I've not fitted a Schneider consumer unit in years/possibly only before Schneider purchased the original companies. Anyhow, are the line and neutral connections really that way around? Every consumer unit I've fitted with the main switch on the left had line on the left and neutral on the right.