2017-06-16 Letter to Suzanne Case re Inspections of Uncle Billy's

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(C) Nonmetallic Boxes and Conduit Bodies. Nonmetallic Boxes and conduit bodies shall be suitable for the lowest Temperature-rated conductor entering the box. Where nonmetallic Boxes and conduit bodies are used with messenger supported Wiring, open wiring on insulators, or concealed Knob-and-tube wiring, the conductors shall enter the box Through individual holes. Where flexible tubing is used to Enclose the conductors; the tubing shall extend from the last Insulating support to not less than 6 mm (1/4 in.) inside the Box and beyond any cable clamp. Where nonmetallic sheathed Cable or multiconductor Type UF cable is used, The sheath shall extend not less than 6 mm (1/4 in.) inside The box and beyond any cable clamp. In all instances, all Permitted wiring methods shall be secured to the boxes. Exception: Where nonmetallic-sheathed cable or multiconductor Type UF cable is used with single gang boxes not Larger than a nominal size 57 mm x 100 mm (21/4 in. x 4 in.) Mounted in walls or ceilings, and where the cable Is fastened within 200 mm (8 in.) of the box measured along the sheath and where the sheath extends through a cable Knockout not less than 6 mm (1/4 in.), securing the cable to The box shall not be required. Multiple cable entries shall Be permitted in a single cable knockout opening.