Do you need an earth rod for an outbuilding?

[Josh95]

Fed from a spur on an existing ring in the house with a 2.5mm 3 core swa running to the shed (about 10m away from the house). Im going to put a small consumer unit inside the shed with an rcd in with a 6a mcb for a few light & a 16a mcb to feed 2 double sockets.

The house is tnc-s.

Josh

 

[westward10]

So you will have a 16A for the sockets and a 13A at the FCU.

 

[Josh95]

Fed from a spur on an existing ring in the house with a 2.5mm 3 core swa running to the shed (about 10m away from the house). Im going to put a small consumer unit inside the shed with an rcd in with a 6a mcb for a few light & a 16a mcb to feed 2 double sockets.

The house is tnc-s.

Josh

 

[Josh95]

Fed from a spur on an existing ring inside the house with a 2.5mm 3core swa running to the shed (10m from the house). A small garage consumer unit in the shed with an rcd, a 6a mcb for 3 lights & a 16a mcb to feed 2 double sockets.

The house is tnc-s

Josh

 

[Josh95]

Fed from a spur on an existing ring inside the house with a 2.5mm 3core swa running to the shed (10m from the house). A small garage consumer unit in the shed with an rcd, a 6a mcb for 3 lights & a 16a mcb to feed 2 double sockets.

The house is tnc-s

Josh

 

[Josh95]

10A for the sockets then!

 

[Wilko]

Hi Josh, I'm thinking this design may be affected by reg 434.2 and 434.2.1(i) which seems to limit length of an un-fused spur to 3m.
I would add a new radial to CU. Cheers.

 

[Josh95]

Its not un-fused.

 

[Taylortwocities]

Fed from a spur on an existing ring inside the house

So there's a a 13A FCU from the ring final that the SWA connects to?

 

[westward10]

So it seems, probably doesn't need a CU just fit socket/s straight to it with a FCU for the lights.

 

[bigspark17]

Are there any extranneous conductive parts in the shed.? What type of shed isit?

 

[Taylortwocities]

That depends on if the circuit in the house is RCD protected. If not then a mini 'garage' CU may be preferable. But we do not know enough to guess. As posted several days ago.....:

So much more info required josh!

 

[Josh95]

Its not rcd protected in the house thats the reason for the cu in the shed.
No extraneous conductive parts & the shed is made of wood.

 

[Pat H]

If the ring in the house isn't RCD protected then I'd make the FCU an RCD unit so that the SWA is RCD protected as so is the shed.

TFP10WL TIMEGUARD, CONNECTION UNIT, RCD, FUSED, WHITE | Farnell element14 - http://uk.farnell.com/timeguard/tfp10wl/connection-unit-rcd-fused-white/dp/1642925?

A small CU in the summer house with a 10A for the sockets and a 6A for lights would then be ok.

That then opens the question of: Should the shed CU be metal...?

If remote from the house and not part of the habitation then possibly no but as its wood its flammable.

 

[Josh95]

Would an earth rod be needed ?