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8 Nice Steel Wire Gauge Calculator Ideas - Article 250.134 describes the strategies with the aid of which fixed device shall be related to the egc. The maximum not unusual application for pv installations is described in 250.134(a), which says the conductor types listed in 250.118 are permitted for use as an egc. The opposite suitable approach is indexed in 250.134(b), which lets in the gadget to be related to an egc "contained in the identical raceway, cable, or otherwise run with the circuit conductors.".
Paragraph 250.136(a), referenced in article 690.Forty three, allows gadget to be considered grounded for "electrical system secured to and in electric touch with a metal rack or structure supplied for its assist and linked to an system grounding conductor via one of the method indicated in 250.134." New language in 690.Forty three outlines the option of the usage of gadget listed for bonding frames and racks together: "gadgets indexed and recognized for grounding the steel frames of pv modules will be permitted to bond the exposed metal frames of pv modules to grounded mounting structures." This extra language in 690.Forty three is beneficial for the usage of grounding clips that bond the modules to the racking machine, which is then bonded to the floor bus within the junction field or combiner container. This specifies any other method no longer formerly spelled out within the nec and clarifies the requirements indexed in 250.136(a) at the appropriateness of the use of the racking shape in this utility.
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