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Difference between TN-C-S and TNS?
- Thread starter --tom
- Start date
TN-S may have a visible seperate conductor entering the building for an earth, or the sheath of a lead cable may be used to supply the earth. You may also find that a SPLIT CONCENTRIC cable has been used to feed your property, and the earth connection is on the side of the service head. BUT this looks identical to a PME or TN-C-S system, and you cant tell with out removing the service head cover which it is. (you must not do that).
It is possible to do a loop impedance test from L to N and L to E to determine.
PME or TN-C-S have the earth connected to the neutral inside the service head, and you cant normally see this link.
It is possible to do a loop impedance test from L to N and L to E to determine.
PME or TN-C-S have the earth connected to the neutral inside the service head, and you cant normally see this link.
K
kai
There ought to be a Label saying that there is a PME system in use, on the service fuse block or near it.
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