Burnt out pull cord to electric shower

[telectrix]

I turn it off after every shower ? is that not right haha

it's not right. it's designed as an isolator. switchig on and off under load shortens it's life expetancy, like me having smoked 40/day for 50 years. i'm getting a bit of a cough and i'm only 73.

 

[Midwest]

I turn it off after every shower ? is that not right haha

I would not bother, your shower has a perfectly decent arrangement to turn it on & off.

Back to your issue, if the cable has suffered thermal damage, it will need cutting back to where the cable is good. That can be some distance, in some cases.

What has your electrician advised, and what has he/she said about the sizing of the cable?

 

[Sammw123]

I would not bother, your shower has a perfectly decent arrangement to turn it on & off.

Back to your issue, if the cable has suffered thermal damage, it will need cutting back to where the cable is good. That can be some distance, in some cases.

What has your electrician advised, and what has he/she said about the sizing of the cable?

The electrician took one look at it and said replace your whole fuse box? I understand the 32amp on the fuse box may need replacing for a 40 amp for the shower but this could be replaced individually not the whole fuse box? He didnt even look at the 4mm cable that leads to the fuse box and just said to call when I want the whole fuse box replacing. That's what brought me here really as that is a expensive job and if there is an alternative I would rather try that first

 

[Midwest]

The electrician took one look at it and said replace your whole fuse box? I understand the 32amp on the fuse box may need replacing for a 40 amp for the shower but this could be replaced individually not the whole fuse box? He didnt even look at the 4mm cable that leads to the fuse box and just said to call when I want the whole fuse box replacing. That's what brought me here really as that is a expensive job and if there is an alternative I would rather try that first

Hmmm easy for me to say, but why does your whole fusebox need replacing, is it somewhat old & tired?

The MCB needs to be sized in accordance with the cable size & how its installed. Likewise, a shower load should be installed with a suitably sized cable & MCB, i.e. the circuit should be designed for its load appropiately.

 

[SJD]

Perhaps post a photo of the fusebox.

 

[pc1966]

Usually the only genuine reason for replacing the CU (consumer unit = fusebox) when something is under rated is when it is so old you can't get compatible parts.
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Already mentioned is that a 8.5kW shower needs an minimum of 6mm cable (and even then not through a thermally insulated route) and generally most electricians would be selecting 10mm cable.

 

[Sammw123]

Hmmm easy for me to say, but why does your whole fusebox need replacing, is it somewhat old & tired?

The MCB needs to be sized in accordance with the cable size & how its installed. Likewise, a shower load should be installed with a suitably sized cable & MCB, i.e. the circuit should be designed for its load appropiately.

My house was built in 1991 I dont know how long they are suppose to last and the 4mm cable that supplied the fuse box comes through the loft. I am thinking a new fuse box may be easier at this point it seems there are lots of faults on the shower cabling

 

[Midwest]

If it was my house, I’d be getting more than one quote to have that fuse box replaced, and a new properly sized cable run to your shower.

 

[westward10]

Have trouble getting a Legrand breaker for that.

 

[radiohead]

An alternative solution would be to replace your 8.4kw shower with a 7.2kw unit, in which case your CU and existing 32a mcb and wiring should be adequate to leave in place. Not necessarily the best option but if your budget is tight...….