8.5kw shower wires in 4mm, burnt terminals | Page 2 | on ElectriciansForums

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

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 :/
 
but was not undersized for the 7kW shower, and was suitably protected with a 32A MCB. a bit like the chandelier i just repaired for a customer. 105VA transformer supplying 10 x 10w G4 lamps. he'd fitted 10 x 20w G4s and wondered why the transformer failed.
 
The landlord said they told the electrican what shower they were getting. And the sparks installed it with the cable, he must have known it was 8.5kw.
 
The landlord said they told the electrican what shower they were getting. And the sparks installed it with the cable, he must have known it was 8.5kw.
even 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 :/

Sounds like he had plastic wrists
 
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.

[ElectriciansForums.net] 8.5kw shower wires in 4mm, burnt terminals
 
^^ even if I knew it was going to be a 7kw shower, I would still have fitted 6mm cable

Which is fine, and if you wish to do that then there is nothing preventing you from doing so. But if the calculations show that 4mm is suitable then you cannot criticise someone for installing 4mm, whatever your personal preference in the situation.
 
10.0 doesn't prevent loose connections and burnt conductors.
You're quite right.
I always tighten connections. Leave them a minute to settle then u can normally get another quatre turn on them.
The reason we always wire a new shower supply in 10mm, is so the customer has some flexibility when coming to choose a shower.
And like ive seen before, when the customer decides on him/her self to uprate the shower to a 10.5kw. Not realising the existing 6mm will not be adequate. (Normally a trip back to b and q for them)
I would always recommend not installing a electric shower, much better of a combi, but needs must sometimes
 
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?
 
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?

Hi wilko. Yes that was indeed the problem.
Only been in for 8 months, so someone with plastic wrists must of installed it.
I just think it's good practice to always install a 10mm cable for a new shower install.
 

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

News and Offers from Sponsors

  • Sticky
  • Article
Wicked I've just actually looked through it and it's very smart. Some good stuff in it. There's a tile association company that do a magazine...
Replies
2
Views
281
  • Article
OFFICIAL SPONSORS These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then...
Replies
0
Views
270
  • Article
Hi everyone, Another weekend, another sale! Get ready for colder days with Haverland Radiators, combining efficiency with modern design. Keep...
Replies
0
Views
351

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

YOUR Unread Posts

This website was designed, optimised and is hosted by untold.media Operating under the name Untold Media since 2001.
Back
Top