We Wrote The Book on Electrical Earthing


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When did the National Electrical Code require earthing/bonding for swimming pools?

The National Electrical Code (NEC) first introduced swimming pool earthing and bonding in the 1962 edition.  In this edition, the code required that all metal objects, including: the steel rebar in concrete (support), metallic conduit, piping systems, pool reinforcing steel, light fixtures, ladders, diving boards and the like, shall be bonded together and earthed to a common earth.   A minimum 14 AWG wire was required for this bonding.

In the 1965 they increased the bonding wire size from 14 AWG to 8 AWG, and in 1968 they added the 5-ft rule.  The 5-ft rule required that every metal object within 5-ft of the pool must be bonded to the same equipotential earthing  system.

Today’s 2011 (and the upcoming 2014) code is very similar to the original 1962-1968 codes, of course with more details and clarifications.

The Engineering Team at E&S Earthing Solutions


Photo Credit: E&S Earthing Solutions

2 Responses

  1. Since water has high capacity to transfer electricity and human bodies are good electric receiver, then ensuring that the pool is properly bonded and earthed equates to safety. There have been a lot of shock incidents in the past and putting up a standard would create peace in people enjoying their leisure time by swimming.

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