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Mixed earthing

A relatively large and dated commercial building has been sub-divided in to individual units. The original building had several DNO supplies some PME and some TT. It looks like the building may have originally been a cluster of separate buildings which are now all under the same roof. Each sub-divided unit has its own installation supplied from one of the original DNO sources. Whilst the wiring is separate they do share steel trunking and structural steel. One of the larger units which is TT is to be let to a company that will have a heavy IT dependence. Just thinking about the possibility of EMI due to the common connections. Any opinions?
Parents
  • From an EMI/RFI point of view you need to make sure that the earthing form the IT equipment is as short and stout as possible. Other than that I guess normal rules apply incidentally are all the supply's from the same tranny?
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  • From an EMI/RFI point of view you need to make sure that the earthing form the IT equipment is as short and stout as possible. Other than that I guess normal rules apply incidentally are all the supply's from the same tranny?
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