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- 27 Sep 2004
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Got to price for a mains upgrade on a farm.
Currently there is a PME earth connection at the origin which is sited in a small stone building by the road. In here is a switch fuse to supply the house, one to supply the dairy, one for the farm buildings and one for the workshop.
Single Phase supply.
My plan is to fit a new dist board, with DP Main switch. Then a 300mA TD RCD for the farm buildings supply via a 63A MCB, another 300mA TD RCD for the dairy via another 80A MCB, a 30mA RCD and 50A MCB to the workshop and a 100mA TD RCD and 63A MCB for the house.
May seem overkill on RCD's especially considering the price, but thought that way nuiscence tripping would be kept to a minimum.
Was thinking to divorce the PME earth immediatly at the origin, and TT it here. Some of the steel frame buildings are already TT earth at the minute.
Is DP MCB's required considering it will be TT even though there is a DP RCD up front? Thoughts on this setup appreciated.
Thanks!
Currently there is a PME earth connection at the origin which is sited in a small stone building by the road. In here is a switch fuse to supply the house, one to supply the dairy, one for the farm buildings and one for the workshop.
Single Phase supply.
My plan is to fit a new dist board, with DP Main switch. Then a 300mA TD RCD for the farm buildings supply via a 63A MCB, another 300mA TD RCD for the dairy via another 80A MCB, a 30mA RCD and 50A MCB to the workshop and a 100mA TD RCD and 63A MCB for the house.
May seem overkill on RCD's especially considering the price, but thought that way nuiscence tripping would be kept to a minimum.
Was thinking to divorce the PME earth immediatly at the origin, and TT it here. Some of the steel frame buildings are already TT earth at the minute.
Is DP MCB's required considering it will be TT even though there is a DP RCD up front? Thoughts on this setup appreciated.
Thanks!