Darren Crannis, ECA Technical Manager, looks at protective earthing systems and unravels the difference between PME and PNB. The distinctions between TN-C-S earthing variants, Protective Multiple Earthing (PME) and Protective Neutral Bonding (PNB), often lead to confusion. Despite both falling under the TN-C-S category, they diverge significantly, impacting design considerations and inspection outcomes. Here we ...

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The aim of this article from the experts at NICEIC is to explain the operating characteristics of the protective multiple earthing (PME) earthing facility, a type of TN-C-S system, which is commonly provided for both new and existing electrical installations. In a PME arrangement the supply neutral conductor functions as both protective and neutral conductors ...

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