What would fit this DB

[chris day]

Without changing the fuse board what would be the best way to get a 50a supply to a shower.

I was hoping If I could not get an RCBO just an MCB to supply an RCD unit.

Wishful thinking

 

[Taylortwocities]

You won’t even get a 50A MCB for that board!

 

[Octopus]

You may find a 45A

Wonder what Kw rating the shower is?

 

[chris day]

what wattage is the shower?

10.8 KW

 

[chris day]

With that age of CU , wonder what the earthing and bonding is like?

All is in place

 

[Dave OCD]

10.8 KW

I do my best to steer clear of showers that powerful Chris, at the more realistic voltage of 240 that's 45 amps, even 10mm cable if running through insulation can get hot , I'd stick to a maximum of 9.5kW but that's just me.

 

[Marvo]

Are the showersgenerally getting more powerful? I seem to remember a year or two ago all the shower threads involved 9kW supplies...

 

[Dave OCD]

Yes 10.5- 10.8kW now seem to be a popular choice Marvo - the perception being that you'll get better flow of hot water even in winter when the incoming water is very cold. But the customers [and often plumbers] don't understand the electrical implications at all unfortunately.

 

[Marvo]

Wow, 10.8kW is quite something on a single phase domestic supply. If they keep getting larger you're going to be terminating 16mm wiring into one of those rediculous ceiling mounted pull switches pretty soon. I'd pay good money to watch a sparky doing that.

 

[Taylortwocities]

Easy, Marvo. Don't have a switch!

 

[Toneyz]

From my 2002 MK catalogue s.p solid neutral RCBO's only up to 45A.
Do you still have off-peak heating?

 

[Paul P]

They used to make a MCBconversation kit for those.

https://uk.rs-online.com/web/p/consumer-unit-accessories/3815710/

 

[Paul P]

They used to make a MCBconversation kit for those.

https://uk.rs-online.com/web/p/consumer-unit-accessories/3815710/

 

[Paul P]

They used to make a MCBconversation kit for those.

https://uk.rs-online.com/web/p/consumer-unit-accessories/3815710/

 

[freddo]

With that board I'd go with a separate unit for the shower. You can get electric showers up to 12.5KW which is pushing things rather a lot. We fitted one last year (with permission from DNO) wired with 16mm T+E. Ridiculous.

 

[Taylortwocities]

With that board I'd go with a separate unit for the shower. You can get electric showers up to 12.5K.

I wish that I had suggested that, oh I did!

Keep the existing fuseboard and add a separate 'mini' CU that has an RCD and an MCB in it (aka shower unit)
Or is that not what you are looking for?