Unused knockouts and openings in electrical equipment panelboard other than openings for mounting purposes or special equipment must be sealed to provide protection equal to the cabinet wall of the equipment. 70;Where a service raceway enters a building or structure from outside, it must be sealed per 300. Sealants must be identified for use with cable insulation, conductor insulation, bare conductor, shield, or other components., caulk, fire-retardant caulk, fire-rated spray foam, etc. Article 314 applies to: These. The code specifies the minimum box size you will need for different wire sizes and the minimum volume size of the box required for different numbers of conductors. Proper wiring color codes should be used according to the NEC and IEC wiring color codes for AC and DC. Check for proper IP/NEMA ratings and material quality. Practice good wiring: secure.
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