All references are based on the 2020 edition of the NEC.
Sunshine State Surprises
I spotted these violations on the backside of some Key West, Fla., shops. The wrong type of MC cable was used here. Installing MC cable in wet locations such as this is permitted by Sec. 330.10(A)(11), but only when a corrosion-resistant jacket is covering the metal covering and any one of the following three conditions are met: the metal covering is impervious to moisture, a moisture-resistant jacket is provided under the metal covering, or the insulated conductors under the metal covering are listed for use in wet locations. These MC cables look like typical MC cables that would be used for wiring offices or other commercial spaces. They’re not suitable for this outdoor wet location. Securing cables to the exterior of rigid PVC conduit as a means of support for cables violates the requirements in Sec. 300.11(C). The black cable ties are most likely UV resistant or sunlight resistant, but the white cable ties are typically not identified for use in sunlight and would not comply with Sec. 300.6(C)(1). In my experience, cable ties that are not sunlight resistant generally will become brittle and fail rather quickly when installed in areas exposed to sunlight.
Fudge Shop Follies
This photo was taken while I was walking along the sidewalk next to this fudge shop. I noticed the end of an extension cord hanging out of the soffit where the roof overhangs the sidewalk. After noticing the eye hooks screwed into the window frames, I figured this cord is probably used to provide power for holiday lighting displays. Section 400.10 provides only 11 permitted uses for flexible cords and flexible cables. These 11 permitted uses are further limited by the restrictions imposed by Sec. 400.12. Flexible cords, flexible cables, cord sets (otherwise known as extension cords), and power supply cords have seven prohibited uses as follows: (1) as a substitute for fixed wiring; (2) where run through holes in walls, ceilings, or floors; (3) where run through doorways or windows; (4) attached to building surfaces; (5) located above suspended ceilings or concealed by walls, floors, or ceilings; (6) in raceways unless permitted by other Code Sections; and (7) where subject to physical damage. I would say this extension cord use violates items (1), (2), and (5). Permanent wiring methods as specified in Chapter 3 should be used if the shop owner really wants to have a receptacle outlet located on the outside of the shop.
