How to bodge up a deliberate mistake

telectrix

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• Apr 3, 2021

• #2

just trying to work out WTF is going on there.

 

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timhoward

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• Apr 3, 2021

• #3

Looks like bus bar cut too short on left and spare tail used to feed 6th MCB from left?

 

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telectrix

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• Apr 3, 2021

• #4

but that 25mm? bit of tail is just linking 2 MCBs that have no L feed.

 

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• Apr 3, 2021

• #5

It loos like a dual-RCD board and someone wanted a single non-RCD MCB feed.

 

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pc1966

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• Apr 3, 2021

• #6

But it really begs the question "why?" as there are surprisingly few circuits for that size of CU and one wonderes what the 32A non-RCD feed with two cables was needed for.

 

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timhoward

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• Apr 3, 2021

• #7

pc1966 said:

But it really begs the question "why?" as there are surprisingly few circuits for that size of CU and one wonderes what the 32A non-RCD feed with two cables was needed for.

Click to expand...

Assuming it's a house, and those two are a RFC I still think someone ran out of bus bar or cut it wrong and this was their hack. Either way plenty of questions, as why not just swap an unused breaker.....

 

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timhoward

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• Apr 3, 2021

• #8

UNLESS there is an earth fault on the RFC....
Also seem to be not enough neutrals conductors?

 

Last edited: Apr 3, 2021

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Mike Johnson

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• Apr 3, 2021

• #9

I'll go with the bus bar cut short.

 

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Darkwood

• Apr 3, 2021

• #10

Can a mistake be deliberate ? lol, I thought the whole reason we call them mistakes is because they are not intentionally done.

 

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telectrix

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• Apr 3, 2021

• #11

Mike Johnson said:

I'll go with the bus bar cut short.

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is that your new hair style, cut short?

 

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Mike Johnson

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• Apr 3, 2021

• #12

You can't cut short what you haven't got.

 

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telectrix

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• Apr 3, 2021

• #13

solvol autosol. used to use it on the aluminuim casing on motorbike. shone like the moon.

 

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Mike Johnson

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• Apr 3, 2021

• #14

Yes I think my Grandfather used that.

 

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Soi disant

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• Apr 3, 2021

• #15

telectrix said:

but that 25mm? bit of tail is just linking 2 MCBs that have no L feed.

Click to expand...

No, it runs from the outgoing main switch L to the infeed of that B32.

pc1966 said:

But it really begs the question "why?" as there are surprisingly few circuits for that size of CU and one wonderes what the 32A non-RCD feed with two cables was needed for.

Click to expand...

My money is on a board change from a Wylex standard, sparky had stocked up on a few of those CUs when his wholesaler had them on a FGS-won't-somebody-buy-them offer, he didn't do any testing first, when he found that the RCD was tripping he hurriedly moved the neutrals, hacked the end off the busbar, bunged in that bit of tail and rode off home for tea.

timhoward said:

UNLESS there is an earth fault on the RFC....

Click to expand...

Roll up, roll up, place yer bets....

timhoward said:

Also seem to be not enough neutrals conductors?

Click to expand...

Looks that way. Must be a camera angle thing though?

 

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