Heating from a seperate building

[musicspark]

With the shed so close to the house I think I would stick with the exported earth option, and some good size bonds, especially if pipes are copper back into property. Also you have 240v boiler controls back into property so keeping installation as one system seems more sensible to me. TT ing when this close seems unnecessary, and via boiler controls possible introduces differing earth potential to house.

I agree, I would only TT if the shed had it's own independent water supply.

There! :| I've stuck my head out somebody shoot mePray

 

[a1]

Bang.

 

[binky]

I'm waiting for Steptoe Pray

 

[Apache]

I'm waiting for Steptoe Pray

we all are

 

[maccarooni]

OK

been to the site today.

Shed is 2/3 ft away from house. Plumber has moved mains water supply to shed. Oil to go straight to shed, Water feed to house to be brought in via 22mm copper pipe, to kitchen sink, and then on to rest of house. plumber is a traditional sort, dont use that plastic stuff. All copper pipework throughout. so the plan is 10mm T&E plus 10mm bond to shed. 10mm earth to sink, Export pme AND TT shed.

I think this will negate any potential difference.

What about copper flow and return on the heating, should i aslso bond these.

Macca

 

[kme]

Why not......Technically unnecessary, but if you`re there, and the pipes`re there............

BUT...... 10mm bond? I think I`d want a 16 minimum, as it could have to carry a lot of current in the event of a PME fault........

Just my opinion, of course.

 

[maccarooni]

Why not......Technically unnecessary, but if you`re there, and the pipes`re there............BUT...... 10mm bond? I think I`d want a 16 minimum, as it could have to carry a lot of current in the event of a PME fault........

Just my opinion, of course.

And thank you for it.

As the house has 16mm tails on a 63a cut-out, with 10mm bond wire, The 10mm bond back to the house as back-up ( as will TT shed ). however if there is the possilility of a fault coming back throught he house, instead of down the rod, I will as always take on board your comments and suggestions.

Macca

 

[spinlondon]

I'd use 10mm