Can Romex Cable be run Through Conduit? National Electrical Code Book
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(B) Protection from Physical Damage. Cable shall be protected from physical damage where necessary by rigid metal conduit, intermediate metal conduit, electrical metallic tubing, Schedule 80 PVC conduit, Type RTRC marked with the suffix -XW, or other approved means. Where passing through a floor, the cable shall be enclosed in rigid metal conduit, intermediate metal conduit, electrical metallic tubing, Schedule 80 PVC conduit, Type RTRC marked with the suffix -XW, or other approved means extending at least 150 mm (6 in.) above the floor. [ROP 7-94] Type NMC cable installed in shallow chases or grooves in masonry, concrete, or adobe shall be protected in accordance with the requirements in 300.4(F) and covered with plaster, adobe, or similar finish.
(B) Wet Locations. The interior of enclosures or raceways installed underground shall be considered to be a wet location. Insulated conductors and cables installed in these enclosures or raceways in underground installations shall be listed for use in wet locations and shall comply with 310.10(C). Any connections or splices in an underground installation shall be approved for wet locations.
Romex cable in various conditions according to the National Electrical Code. The summary focuses on two main points:
Protection from Physical Damage: The National Electrical Code stipulates that cable must be safeguarded against physical damage in necessary situations using protective materials or structures such as rigid metal conduit, intermediate metal conduit, electrical metallic tubing, Schedule 80 PVC conduit, or Type RTRC marked with the suffix -XW, among other approved methods. Specifically, when a cable passes through a floor, it must be enclosed in one of the mentioned conduits or protective means, extending at least 150 mm (6 inches) above the floor to ensure adequate protection. Moreover, Type NMC cable that is installed in shallow chases or grooves within masonry, concrete, or adobe must be protected in accordance with section 300.4(F) of the NEC and must be covered with a finishing material such as plaster, adobe, or a similar compound.
Wet Locations: The interior of enclosures or raceways that are installed underground are classified as wet locations under the NEC. Consequently, any insulated conductors and cables placed within these underground enclosures or raceways must be certified for use in wet locations and must adhere to the specifications outlined in section 310.10(C) of the NEC. Additionally, any connections or splices made within these underground installations must be specifically approved for use in wet locations to ensure compliance and safety.
These guidelines highlight the importance of proper installation techniques and protective measures for electrical wiring, particularly Romex cable, to ensure safety and compliance with national standards.
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