Am planning a garden studio build soon and interested in views and comments for planning power supply.
Existing house is TN-S system; I'm thinking of 6mm 3 core SWA, about 20M run to studio, fed from either existing ring main in garage via a DP isolator, or spare way in CU, but the latter will be difficult to route from.
The SWA at studio end would go to small CU with RCD, to power a number of sockets, lighting and an aircon unit. I haven't calculated the potential loading yet but it will not be above 10 -12A I would think.
Is the TN-S ok to export or does it need an earth rod and therefore provide TT at the studio?
Is a second RCD recommended at the garage end?
Is feeding from the existing ring main OK if I cant utilise the spare way in CU?
many thanks
Existing house is TN-S system; I'm thinking of 6mm 3 core SWA, about 20M run to studio, fed from either existing ring main in garage via a DP isolator, or spare way in CU, but the latter will be difficult to route from.
The SWA at studio end would go to small CU with RCD, to power a number of sockets, lighting and an aircon unit. I haven't calculated the potential loading yet but it will not be above 10 -12A I would think.
Is the TN-S ok to export or does it need an earth rod and therefore provide TT at the studio?
Is a second RCD recommended at the garage end?
Is feeding from the existing ring main OK if I cant utilise the spare way in CU?
many thanks