Bond all conduits entering primary switchgear, main breaker panel, and secondary service entrance switchboard / panelboard with a ground wire connecting the grounding type bushings to the equipment ground bar. Conductors shall be sized per NEC Tables 250. 102. The National Electrical Code® (NEC®) recognizes several types of conductors that are permitted to be used as equipment grounding conductors in Section 250. 118(2), (3) and (4) respectively. Static discharge: Metal doors can build up static charge, especially in high-voltage environments. Fault currents: If a loose wire inside touches the door accidentally, that door becomes live. Without grounding, anyone. Grounding and bonding are the basis upon which safety and power quality are built. 1 Work includes grounding and bonding of system neutral, equipment and conduit systems to conform to requirements of NEC and as detailed on the plans and in the specifications. Each DISTRIBUTION BOX and controller must be grounded.
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