What is the approved method for protecting wires in a bx type cable from cut ends of the armor sheath?

The approved method for protecting wires in bx type cable from the cut ends of the armor sheath is to use a fiber or plastic insulating bushing. This type of bushing provides a barrier that prevents the sharp edges of the armor from damaging the insulation on the wires inside the cable.

Unlike other methods, using a fiber or plastic insulating bushing is designed specifically for this purpose, ensuring both safety and adherence to electrical code regulations. The bushing effectively covers the cut edges, which reduces the risk of short circuits or electrical hazards that could arise from exposed wire insulation.

Additional methods, such as wrapping with electrical tape or inserting a plastic cap, may not provide the same level of protection or might not meet current electrical safety codes. Using a metal sleeve is also not appropriate as it does not insulate and could potentially conduct electricity, posing a safety risk. Therefore, the insulating bushing is the best choice for ensuring the integrity and safety of bx cable installations.