Electric shower in outbuilding 55m from consumer unit

[Tom Wallington]

Hi we've built a cabin in our garden and we're using it as a second home, because every now and then the house will flood and we have to move out! It's an old listed mill building and there is nothing we can do to fix or stop the problem other than to rebuild the house. So we want all the mod cons of the house in the cabin I estimate around 13000w max total with the 9000w electric shower, computer, TV, electric heaters. So I've bought a 63a mcb for the consumer unit in the house, a 55m swa 16mm 3 core, then a 6 way c/u for the cabin, the swa cabin end will be straight into the c/u however at the house end it needs a junction box on the wall outside to a twin and earth 16mm to the c/u inside, my problem is that I can find a 63a junction box there's 60a and below and the 100a ones don't look right as they don't seem to be 3 pole for earth, neutral and live. I don't really know what I'm doing, can someone look this over and tell me if I'm going about it the right way? Thanks

 

[Tom Wallington]

Thanks for your respose I'm not the owner of the house I'm their daughters boyfriend, the owner is an old-school boy of 75! I'm trying to work with him to help him work this stuff out he was planning on using 10mm and getting his electrician friend to sign it off. Ive told him he needs an electrician cause I'm out of my depth and now you've reinforced my first thoughts, we'll persuade him to do the the right thing and get a professional electrician in thanks for all your help. I think we'll end up redesigning how much power we need to use up there and like dave said get a hot water tank there's other ways.

 

[telectrix]

if it's an old mill, must be a river or a stream. what's the need for a shower when you have a ready made natural bath?.

 

[Spoon]

if it's an old mill, must be a river or a stream. what's the need for a shower when you have a ready made natural bath?.

click on his post code. Near river Kensey...

 

[Andy78]

if it's an old mill, must be a river or a stream. what's the need for a shower when you have a ready made natural bath?.

Or even a water wheel for power generation ?

 

[telectrix]

yeah.can turn the water wheel by farting in the bath.

 

[Pete999]

yeah.can turn the water wheel by farting in the bath.

That's a filthy habit

 

[Amp David]

Just returned to the forum after a long break, and I see its still going on. Good grief

 

[ChipFanDave]

There's an electrician from Cornwall on here quite regularly, I can't find him now but I think he name is Henderson.
No doubt if he see this thread he will spot your postcode.

 

[telectrix]

That's a filthy habit

it's not a habit.more a way of life. but we got a jacuzzi bath now, so the farting is only recreational these days.

 

[MFS Electrical]

We're not going to be wiring it up ourselves, we'll be getting an electrician to do it, but I thought if I work it out first buy all the bits, then the electrician won't have to charge as much! We already have an outbuilding with power on a 32a, I'm just trying to copy that but uping the capacity to 63a is it possible? We'll be wanting to use it for guests as well so two showers could be used at once plus whatever else is on.

Chances are you’ll shoot yourself in the foot by doing that as there’s no way your chosen sparky will cover the materials you buy with any warranty or guarantee.....

 

[Toneyz]

it's not a habit.more a way of life. but we got a jacuzzi bath now, so the farting is only recreational these days.

Rubbish Tel it's all the beer you've been drinking and its you farting in the bath

 

[brianmoooore]

At that distance and with that load, a rough calculation shows that you're definitely into 25mm2 SWA territory, not 16mm2.
At the house end this should be unbroken all the way to a 60A switch fuse mounted close to the electricity supplier's meter. Some makes of switch fuse allow you to loop tails out of it and on to the existing consumer unit, eliminating the need for service connector blocks.
Surely, in a building that's prone to flooding, you'll want to be able to switch off the existing consumer unit when the outbuilding's facilities are required?

 

[Dave OCD]

To the OP - If you want this looked at and quoted to do properly just post on this thread or send me a message, I'm in Cornwall but it depends how far you are from me.