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NM Romex in a Commercial Building

Discussion in 'Electrical Codes' started by jar546, Nov 24, 2018.

  1. jar546

    jar546 *****istrator

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    This is a convenience store. Is this an allowable installation?
    If not, can you cite a code section of the NEC?

    IMG_7214.JPG
     
  2. ICE

    ICE Sawhorse

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    My AHJ does not allow exposed NM in other than attics and crawl spaces/unfinished basements. It is possible that we are unique in that respect. We can do that because we are .....well, us. Chicago outlaws the stuff entirely.

    334.15 Exposed Work. In exposed work, except as provided in 300.11(A), cable shall be installed as specified in 334.15(A) through (C).

    (A) To Follow Surface. Cable shall closely follow the surface of the building finish or of running boards.

    (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. 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.
     
  3. steveray

    steveray Sawhorse

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    How many stories and what is the construction type of the building?
     
  4. Pcinspector1

    Pcinspector1 Platinum Member

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    It appears to meet code but frowned upon:( here, puts the AHJ making a determination on possible "physical damage?" In this case it is tucked in a corner and does not appear to be subject to physical damage, IMO.

    Does the NM romex continue up the wall through a suspended ceiling? If so...see 334.12
     
  5. Builder Bob

    Builder Bob Sawhorse

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    Appears the portable Air Conditioner or dehumidifier may be a code violation with the duct work in a commercial building.
     
  6. RJJ

    RJJ Platinum Member

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    What is running through the window sill?
     
  7. steveray

    steveray Sawhorse

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    Just behind the blinds...In front of the brick sill....Had to look twice...
     
  8. jar546

    jar546 *****istrator

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    3b single story convenience store
     
  9. jar546

    jar546 *****istrator

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    It then goes up into a suspended ceiling where it runs 20' to a panelboard in another room.
     
  10. Pcinspector1

    Pcinspector1 Platinum Member

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    There's the violation, the NM romex is not allowed above a suspended ceiling in a commercial application.
    NEC 334.12 Uses not permitted (A)(2).

    My guess is this circuit was not permitted.
     

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