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Supply question

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C

Cristafar

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May 25, 2020
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Hi, just looking for advice. Ive been to look at a Fire alarm install job. While checking where i will take my supply from. 3 phase sub board, i wanted to see where its supplied from and origin etc. It turns out the Electrician has wired the sub mains board from an old redudant 3 phase power line. Hes run 16mm 6181y protected by a RCD. cable runs outside up the pole and connected to the lines.
Then at the sub board there is is 4 core 10mm swa connected to the lines down to the sub mains board.
Surely this is a big No No and needs disconnecting.
 
Not easy to figure out what is going on here,
what exactly is your concern?
is the cable underrated for the protection,
is there a lack of earth?
is the cable (redundant? or now in use) in poor condition?
 
If it is bare wires, separated by air. then assuming it is in good condition, I cant see an issue unless it could come in to contact with something.
have a look at 417.3
have a think, have you identified a risk or a deviation from the regs.
or is it just something you have not seen before and are thinking it must be wrong because it is unusual?
 
James said:
If it is bare wires, separated by air. then assuming it is in good condition, I cant see an issue unless it could come in to contact with something.
have a look at 417.3
Click to expand...
Will do thanks. The manager did say , a tipper truck did catch it once, even though he told him hes close, he said no it will be fine. And yep apparently caught one of the lines 🙈.
 
James said:
If it is bare wires, separated by air. then assuming it is in good condition, I cant see an issue unless it could come in to contact with something.
have a look at 417.3
have a think, have you identified a risk or a deviation from the regs.
or is it just something you have not seen before and are thinking it must be wrong because it is unusual?
Click to expand...
Yes not seen before and wondered if was allowed. Poles may belong to DNO etc. So just wondered if it was allowed . That is all .
 
James said:
If it is bare wires, separated by air. then assuming it is in good condition, I cant see an issue unless it could come in to contact with something.
have a look at 417.3
have a think, have you identified a risk or a deviation from the regs.
or is it just something you have not seen before and are thinking it must be wrong because it is unusual?
Click to expand...
Just read 417.3 👍🏻. Puts my mind at rest.
 
Have you got any photos? I'm picturing something really horrific here.
 
DPG said:
Have you got any photos? I'm picturing something really horrific here.
Click to expand...
No sorry, but its just a pole with 5 horizontal lines 3ph N E . Which go across to, two other poles , between old barns , then a phase dropped down to one board and 3 phase supply dropped down to another fused board , SWA used from the lines down to the boards. All protected by 32amp 60898 with linked 61009 RCB0.
 

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