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(1) Metal Underground Water Pipe
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A metal underground water pipe in direct contact with the earth for 3.0 m (10 ft) or more (including any metal well casing bonded to the pipe) and electrically continuous (or made electrically continuous by bonding around insulating joints or insulating pipe) to the points of connection of the grounding electrode conductor and the bonding conductor(s) or jumper(s), if installed.
Related Code Sections
(1) Wiring and Protection, Metal Underground Water Pipe
A metal underground water pipe in direct contact with the earth for 3.0 m (10 ft) or more (including any metal well casing bonded to the pipe ...
National Electrical Code 2020 of Minnesota > 2 Wiring and Protection > 250 Grounding and Bonding > 250.52 Grounding Electrodes > (A) Electrodes Permitted for Grounding > (1) Metal Underground Water Pipe
(1) Wiring and Protection, Additional Grounding Connection
The grounded conductor of the secondary has a grounding connection elsewhere to a continuous metal underground water piping system. In urban water ...
National Electrical Code 2020 of Minnesota > 2 Wiring and Protection > 242 Overvoltage Protection > 242.54 Interconnections > (A) Metal Interconnections > (1) Additional Grounding Connection