What should be used to protect NM cable when it runs through holes in metal framing members?

Using a grommet to protect NM (non-metallic) cable as it runs through holes in metal framing members is essential for preventing damage to the cable’s insulation. When NM cable passes through metal, there is a risk that the sharp edges of the holes can abrade or cut into the cable sheath, leading to potential electrical hazards or failures.

Grommets, typically made from durable rubber or plastic, provide a smooth and protective barrier around the edges of the holes. This helps to cushion the cable against sharp points and also keeps it securely positioned within the framing, reducing movement that could further contribute to wear and tear. The use of grommets is a standard practice in electrical installations to enhance the safety and longevity of the wiring.

While other options might seem plausible, they do not specifically address the protection of NM cable in this particular situation. Insulation is primarily used for the cable itself and not as a protective measure during installation. Wire loom, while it can provide some level of protection, is not specifically intended for passing through edges of metal and may not fit securely in the same way a grommet does. Plastic conduit can protect wiring, but it is not commonly used simply for passing cable through holes in metal framing, as grom