Shower 8.5 on a 40mcb is it dangerous

[chrismoy1]

Chris, this is the correct sized MCB for a 8.5kW shower, a 32amp device would be running at a slight overcurrent and although it would take a long time to trip it's not permitted in the regulations. I can't stand people who find fault with work unrelated to what they're doing - especially when they're spouting BS.

Thank you very much Dave for a very clear decision on this question.

Regards Chris

 

[Deleted account]

The electrician was there to connect the cooker. He didn't have to mention anything about the shower circuit.

Dont think I agree there, if I saw a potentially dangerous situation I would point it out.

Saying that this is not a good example of that, as it's not a potentially dangerous situation.

 

[chrismoy1]

Dont think I agree there, if I saw a potentially dangerous situation I would point it out.

Saying that this is not a good example of that, as it's not a potentially dangerous situation.

So you are sure it is not dangerous because I think my tenant will still want it changed to a 32 because an electrician has told it is dangerous and must not use the shower.

Regards Chris

 

[GeorgeCooke]

It is NOT dangerous, it is correct.

What would be dangerous is putting in a 32a MCB as it could overheat.

 

[buzzlightyear]

● 7kW - 32amp
● 7.5kW - 32amp
● 8kW - 40amp
● 8.5kW - 40amp
● 9.5kW - 45amp
● 10.5kW - 50amp
This will help the op.

 

[Welchyboy1]

What a tw*t!

That drives me mad!

 

[snowhead]

Rewinding to the beginning;

The tenant has just had a new cooker (delivered and ?) connected by an "Electrician".
Would this be from Currys or similar?

 

[snowhead]

Duplicate post

 

[telectrix]

apart from all the good advice given so far, as long as the 6.0mm is installed as ref. method C, i.e. it can safely carry 47A, ( Ib<Iz ) then aas the shower is a fixed load, overcurrent protection is not required so a 50A MCB could be installed. 433.3.1 (ii). (BYB 17th).

 

[Deleted account]

So you are sure it is not dangerous because I think my tenant will still want it changed to a 32 because an electrician has told it is dangerous and must not use the shower.

Regards Chris

Without actually visiting the site for an inspection I cannot commit to a definate answer as to whether your installation is dangerous, however
Having a 32A or a40A mcb on an 8.5kw shower is quite common and I would not be concerned either way.
Obviously 40A Mcb is the preferred breaker.