3 phase TPN boards - earthing TT Discussion Thread3 phase TPN boards - earthing TT Electrical Advice
Hi guys, starting a new install on a job son and having a complete mind blank. The supply at the main cut-out is a 3 phase TNCS supply. There is then a 50mm SWA running a considerable distance to a workshop where i will be installing a new TPN board as well as an earth rod to make all the workshops on a TT arrangement. From the cut-out end obviously the SWA armouring will be earthed in the switched fuse via the TNCS supply, but i want the workshops separate to this on a TT arrangement. How would you suggest i configure this in a way that the TNCS arrangement isnt continuous through to the TPN boards via the SWA armouring?
Any suggestions would be greatly appreciated.
3 phase TPN boards - earthing TT for the original thread on Electricians Forums
Hi guys, starting a new install on a job son and having a complete mind blank. The supply at the main cut-out is a 3 phase TNCS supply. There is then a 50mm SWA running a considerable distance to a workshop where i will be installing a new TPN board as well as an earth rod to make all the workshops on a TT arrangement. From the cut-out end obviously the SWA armouring will be earthed in the switched fuse via the TNCS supply, but i want the workshops separate to this on a TT arrangement. How would you suggest i configure this in a way that the TNCS arrangement isnt continuous through to the TPN boards via the SWA armouring?
Any suggestions would be greatly appreciated.
3 phase TPN boards - earthing TT for the original thread on Electricians Forums
