Electric showers

[Norn Iron]

Hi
Have a job to do which is a garage conversion, it's being made into a bit of a small home. There's a bedroom, living area utility room and Shower room.There is already a dist board out here supplying the garage but they want an electric shower installed out here.

Now the problem I think I have is that inside the house there is an electric shower in the bathroom and my understanding is that you cannot run 2 electric showers in a domestic property

am I correct in saying this? Look forward to some clarification

 

[Martinm]

I cant see a problem with having two showers, Will the supply to the sub-dist board be big enough to carry 8.5 - 9.5 KW as well as other services?

 

[PKBristol]

Why can't there be 2 showers in a domestic property/why can't there be 2 items of equipment that draw 8 or 10 kilowatts ?
What if the homeowner has got an electric oven and hob ? Does that mean they can't have an electric shower too ? Of course not. Or i'd better get back to my last 2 house rewires and disconnect the cooker or oven. Obviously i'll give the customer a choice.

Paul.

 

[Norn Iron]

Why can't there be 2 showers in a domestic property/why can't there be 2 items of equipment that draw 8 or 10 kilowatts ?
What if the homeowner has got an electric oven and hob ? Does that mean they can't have an electric shower too ? Of course not. Or i'd better get back to my last 2 house rewires and disconnect the cooker or oven. Obviously i'll give the customer a choice.

Paul.

Was looking for constructive pleasant answer not sarky arrogance:33:

 

[amlu]

have a look on cable supplying power to garage - if its big enough

 

[PKBristol]

Sorry mate, it wasn't sarky arrogance, it was just trying to point out the obvious. Just think about it for a minute, most houses have 2 big appliances, ie cooker and shower.

 

[amlu]

2 big appliances - 9kw shower + 9kw cooker - when running full power together = 19kW, thats 82 amperes. adding one more shower to it will make 120 ampers... and thats not including sockets lights anything else just showers and cookers. most domestic cutout fuses are 80 or 100a. incomer switches in consumer unit are rated 100A too.

 

[Norn Iron]

That's ok m8 I just wasn't sure if the main fuse would hold out with 2 showers and everything else

 

[Octopus]

That's ok m8 I just wasn't sure if the main fuse would hold out with 2 showers and everything else

What size is the main fuse?

 

[Norn Iron]

What size is the main fuse?

100Amp

 

[SPARTYKUS]

Have a read about diversity, and look at the time/current graph for a 100 amp fuse in you regs book.

 

[SPARTYKUS]

Amlu

A 9kW cooker will never be running at 9kW! Unless you can somehow get the grill on at the same time as the oven.

The rating on the box is usually all the bits just added together. Sometimes even the gas hob if it has one. Cooker elements cycle too. They're never on continuously like a kettle

 

[KFH]

I stayed in a remote B&B in Ireland. There were two showers in the en-suite bedrooms with a changeover switch in one of the bedrooms to allow the other shower to work. A pain if yuo were in the bedroom without the changeover switch and the occupant of the other room had not changed it back after their shower.

 

[SPARTYKUS]

Type B mcbs should run at 1.13 their value all day. There is a similar value for BS1361 (1.4? Not sure). So although not something to rely on, a couple of showers on probably at worst will make it warm. Although that depend on the whole installation design.

 

[SirKit Breaker]

You wont have an issue with 2 showers on the same supply. You might have if they are both in use at the same time for any length of time. I have come across dozens of instances where there are 2 or 3, high power showers in the same installation especially in HMO's, and there has never been an issue.

your biggest consideration is that of Martinm, is your distribution circuit to the sub board adequate?

Cheers............Howard