Highway_Star
Member
- Messages
- 297
Afternoon all,
Need a bit of input from the hive mind.
I've put up a fair sized shed (10x8 ish) for the wife to use for her craft, sewing, escpaing from the kids.
Needs a supply, for lighs and power.
There happens to be a 3x1.5mm2 SWA running exactly where the shed is, it used to power a lamp post in the garden. I have it disconnected at the house end currently (it was part of a lighting circuit). The SWA is clipped to the vertical edge of some brickwork whihc supports the patio the shed sits on, it's not burried anywhere.
According to what I can find online, 3x1.5 SWA installed that way is good for 23A.
In said shd will be a geet big overhead LED striplight as main lighting.
Then some sockets. These will power things like sewing machines (industrial type & domestics). The big ones are rated max 400w,so not that big really. The wee ones 100w.
Also things like LED bench lights, tranny and no doubt a wee fan heater. Herself already said that as it's just her, there will never be more than one machine running.
I thought, a 2 way DB, 6A (lights) & 16A (sockets).
I guess my question is this:
Do I spur off the house ring main, at 20A to feed the shed?
Or, run from a spare way in the house DB, at 20A?
In either case, the house DB is a dual RCD Hager board, do I put RCD/RCBOs in the shed? And if so, what does one do about selectivity with cascading RCDs?
The shed is within 2m of the house wall, but the cable run is more like 10m due to the route.
Earthing?
Should I ignore supply earth and rod it at the shed?
Or, connect the earth core and the SWA braid to supply earth?
I'm away to try and find my OSG!
Need a bit of input from the hive mind.
I've put up a fair sized shed (10x8 ish) for the wife to use for her craft, sewing, escpaing from the kids.
Needs a supply, for lighs and power.
There happens to be a 3x1.5mm2 SWA running exactly where the shed is, it used to power a lamp post in the garden. I have it disconnected at the house end currently (it was part of a lighting circuit). The SWA is clipped to the vertical edge of some brickwork whihc supports the patio the shed sits on, it's not burried anywhere.
According to what I can find online, 3x1.5 SWA installed that way is good for 23A.
In said shd will be a geet big overhead LED striplight as main lighting.
Then some sockets. These will power things like sewing machines (industrial type & domestics). The big ones are rated max 400w,so not that big really. The wee ones 100w.
Also things like LED bench lights, tranny and no doubt a wee fan heater. Herself already said that as it's just her, there will never be more than one machine running.
I thought, a 2 way DB, 6A (lights) & 16A (sockets).
I guess my question is this:
Do I spur off the house ring main, at 20A to feed the shed?
Or, run from a spare way in the house DB, at 20A?
In either case, the house DB is a dual RCD Hager board, do I put RCD/RCBOs in the shed? And if so, what does one do about selectivity with cascading RCDs?
The shed is within 2m of the house wall, but the cable run is more like 10m due to the route.
Earthing?
Should I ignore supply earth and rod it at the shed?
Or, connect the earth core and the SWA braid to supply earth?
I'm away to try and find my OSG!