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Octopus
^^ even if I knew it was going to be a 7kw shower, I would still have fitted 6mm cable
Discuss 8.5kw shower wires in 4mm, burnt terminals in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net
Q+Q more like
May depend upon the reference method used for installation as 4mm installed in trunking de rates to around 30 ampseven so, the 4mm would have handled that 8.5kW. it's down to poor terminations.
I've told llthe landlord to get other electrican to call me if he has any issues returning to sort, also when I undid the isolator Fascia the cables just fell out the back.
I checked over the board before I disconnected the supply and some of the terminals were LOOSE :/
^^ even if I knew it was going to be a 7kw shower, I would still have fitted 6mm cable
You're quite right.10.0 doesn't prevent loose connections and burnt conductors.
Hi - not to disagree at all with ccc etc, but this pic does look like the heat is concentrated at the termination rather than evenly along the cable. And as the neutral seems unaffected (?) it perhaps suggests in this case the cause was poor termination of the line conductor?I had a similar situation yesterday.
Reports of shower isolator getting hot. Go to check it out. 6mm installed last year supplying a 9.5kw shower. Burnt out connections.
I would always install a 10mm if wirring for a new shower.
View attachment 37616
Hi - not to disagree at all with ccc etc, but this pic does look like the heat is concentrated at the termination rather than evenly along the cable. And as the neutral seems unaffected (?) it perhaps suggests in this case the cause was poor termination of the line conductor?
A job I'm starting a new build bungalow has been specified 16mm twin and earth for 10.5kw shower complete with a wall mounted isolation switch outside of the ensuite, which is a stud wall!
Oh the joys.
Apparently 3 layers of insulation are going in so looking at reference method 101 even 16mm twin only pulls 46 amps reference method 101.
At 10.5kw I'm looking at a loading of 43-44 amps so the 16mm will be able to handle it.
I need to consult the builder and maybe request some boards are fixed above the insulation so a 10mm can be clipped above the insulation.
They won't budge to a lower rated shower tho.
Doubt I'd even manage to fit a 47mm box in the wall as the studs are only about 50mm deep
I'll get round it as I really don't want to be installing 16mm but it's not mine or my company's specThat is a narrow stud
Thankfully always 4x2 with the joiners we work with.
Would not like to terminate a 10mm in anything less than a double 47mm box.
To be honest don't like wirring showers fullstop
I've used them on 10mm never on 16mmDon't like using them, but could u fit a 47mm faster fix box to give u that extra room.
Reply to 8.5kw shower wires in 4mm, burnt terminals in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net
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