Supply to Showerblock for glamping

[Jimbosmith]

Hi guys, some friends of mine are setting up a glamping business and have asked for some advice from me regarding the electrics

Farmhouse/farmshop fed from a 3phase supply.

They want to set up a showerblock roughly 120m away from the incommer. Now the problem they are wanting to use 2 electric showers(no idea loading on these), lights and a couple of sockets.

Any ideas on the best way to do this? Quick calculation on a 60amp supply puts the cable at a 50mm 3core armoured. Its the showers which are the main problem. Im tempted to tell them to install a oil boiler and do away with the electric showers which will drop the loading and then the 60amp would be sufficient for everything the need. Any helps would be appreciated

 

[Octopus]

You need to present your friends with some rough costs and pros and cons...... Then let them stew! Otherwise you will go round and round designing it....... Then they will give the spec to others to quote.

 

[westward10]

I would definitely not be installing electric showers.

 

[Wilko]

Hi - a few thoughts - hope they help
For greater than 100m we are permitted to have more than 5%, up to 5.25% at 150m (since it's for glamping showers I wouldn't use the lighting limits). Using 35mm seems to fit within this voltage drop for the 60A you mention. But for 2 showers and some lights wouldn't 40A per phase be enough? Then 25mm 3phase should be ok. Need to think about TT at the shower block, I reckon.

 

[Wilko]

I would definitely not be installing electric showers.

Make them suffer !

 

[Bob Geldoff1234]

Would you not have to think about some form of heating in the shower blocks?Wouldn't fancy taking a shower in a building that's only 3 degrees!

 

[ImpededLoop]

How about an immersion heater instead of electric showers? You could get a 3 phase one to balance the phases.

 

[Leesparkykent]

Yeah an immersion would be a better idea imo.

 

[LeeH]

You could also think about investing in PV and heat the water with immersion during the summer. Google iBoost.

 

[bigspark17]

I would deffo be installing heating in the showeroom also. Are there any extraneous conductive parts in showerooom, pipes? Structural steel?

 

[FatAlan]

If this is proper glamping you'll need a feed at each tent for the jacuzzis as well!

 

[davesparks]

Hi - a few thoughts - hope they help
For greater than 100m we are permitted to have more than 5%, up to 5.25% at 150m (since it's for glamping showers I wouldn't use the lighting limits). Using 35mm seems to fit within this voltage drop for the 60A you mention. But for 2 showers and some lights wouldn't 40A per phase be enough? Then 25mm 3phase should be ok. Need to think about TT at the shower block, I reckon.

This is going to be feeding lighting circuits so needs to comply with the lighting VD.

How much BD have you allowed for in the final circuits?

 

[davesparks]

Hi guys, some friends of mine are setting up a glamping business and have asked for some advice from me regarding the electrics

Farmhouse/farmshop fed from a 3phase supply.

They want to set up a showerblock roughly 120m away from the incommer. Now the problem they are wanting to use 2 electric showers(no idea loading on these), lights and a couple of sockets.

Any ideas on the best way to do this? Quick calculation on a 60amp supply puts the cable at a 50mm 3core armoured. Its the showers which are the main problem. Im tempted to tell them to install a oil boiler and do away with the electric showers which will drop the loading and then the 60amp would be sufficient for everything the need. Any helps would be appreciated

How are you intending to get a 3ph supply down a three core cable? Or are you just using single phase and putting the supply out of balance?

Their best bet in my opinion would be an unvented cylinder heated by solar (the wet type, not PV) and backed up by the immersion heater.

 

[davesparks]

You could also think about investing in PV and heat the water with immersion during the summer. Google iBoost.

Better to use solar water heating (I don't know the correct term) rather than PV, it'll be more efficient than converting the energy to electricity and then to heat.

 

[LeeH]

Fed FROM a three phase supply. Don't think he intends to take all 3 to the building?

60A, 30/shower on 1 phase.

 

[HandySparks]

Better to use solar water heating (I don't know the correct term...

Solar thermal.