P
PeteC
Hi, any ideas please?
A modern barn structure, sudivided, has a common internal sub-supply from a TNS head.
At the end an adjoining switch room for external plant, with a TNCS sub-supply from a TNCS supply head.
The building has steel frame (set into concrete) steel purlins and roof. Metal clad, metal everywhere.!
An on-roof mounted array (framework earthed through direct contact to metal parts~ TNS side) SMA 17000TL's connected to The TNCS sub-supply.
Only theory I can come up with is turn both TNCS and TNS sub-supplies into TTs, but the building structure would remain a common grounding?
A modern barn structure, sudivided, has a common internal sub-supply from a TNS head.
At the end an adjoining switch room for external plant, with a TNCS sub-supply from a TNCS supply head.
The building has steel frame (set into concrete) steel purlins and roof. Metal clad, metal everywhere.!
An on-roof mounted array (framework earthed through direct contact to metal parts~ TNS side) SMA 17000TL's connected to The TNCS sub-supply.
Only theory I can come up with is turn both TNCS and TNS sub-supplies into TTs, but the building structure would remain a common grounding?