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Aug 1, 2023 · August 01, 2023 by Lorenzo Mari. Learn about the rules for bonding piping systems and exposed structural metal. NEC Section 250.104 requires bonding the building’s exposed structural metal, interior water piping, and other metal piping systems.
Jul 23, 2023 · It was my understand the NEC wants you to use the cold water pipe (if available) for these reasons: 1 > it provides an earth ground, 2> it grounds all the metallic water pipes to prevent a potential shock in the bath/shower/sink, if the plumbing was energized.
Jun 19, 2017 · Bonding and grounding explained. All home electrical systems must be bonded and grounded according to code standards. This entails two tasks: First, the metal water and gas pipes must be connected electrically to create a continuous low resistance path back to the main electrical panel.
Apr 16, 2016 · Water Pipes for grounding. Water pipes have been used extensively in the past as a grounding electrode. Water pipe connections are not testable and are unreliable due to the use of tar coatings and plastic fittings.
Oct 1, 2005 · Where hot and cold water pipes are electrically connected, you need only one bonding jumper — to either the cold- or hot-water pipe. Otherwise, use a single bonding jumper sized per 250.104(A)(1) to bond the hot- and cold-water piping together.
Jul 21, 2015 · According to National Electrical Code, the water piping must be bonded to the service equipment enclosure, the grounded conductor at the service (service "neutral"), the grounding electrode conductor (where large enough), or directly to one or more of the grounding electrodes.
250.68 (C) (1) Grounding Electrode Conductor Connections. Interior metal water piping. Code Change Summary: A revision was made to clarify which portion of interior metal water piping can be used to extend a grounding electrode conductor (GEC).
