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8.5kw shower wires in 4mm, burnt terminals

Discuss 8.5kw shower wires in 4mm, burnt terminals in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

R

robo83

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Just arrived at a job, 45amp shower isolator completely burnt out.

Checked cable and it's 4mm tne in trunking to 8.5kw triton riba shower on a 32amp mcb. Cable run is 5meters.

This was a new circuit installed only a few months ago. I expect loose connection on isolator causing burnt terminals.

I am going to request cable uprated to 6mm, anyone else make any sense why a 4mm was used?
 
That's all he had in the Van, or quite obviously he has miscalculated.
 
Last edited:
Ah sid it I'll stick some 4mm2 in, it'll be OK til it burns out, I'll be long gone by then, or something to that effect, or he's aDilbert.
 
He put the 4.0mm on a 32 amp mcb,it was supplying a 7KW unit, its since been changed for the 8.5KW by the user:)

Fantasy thinking I suppose but it often happens,think of 6.0mm and the purchases of the monster energy guzzlers by the ladies swooning over their size in B+Q
 
Des 56 said:
He put the 4.0mm on a 32 amp mcb,it was supplying a 7KW unit, its since been changed for the 8.5KW by the user:)

Fantasy thinking I suppose but it often happens,think of 6.0mm and the purchases of the monster energy guzzlers by the ladies swooning over their size in B+Q
Click to expand...
Deleted
 
Murdoch said:
Who in their right mind would run in a new dedicated shower circuit in 4mm?
Click to expand...
someone who calculated that it was adequate for the load it served.
 
Just spoke to landlord.

Landlord purchased shower first and informed her other electrican what she had purchased, he then went and installed supply.
 

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