When boring holes for cable-type wiring methods in wood members, what is the minimum distance from the edge of the hole to the nearest edge of the wood member?

The minimum distance from the edge of the hole to the nearest edge of the wood member being 1 1/4 inches is based on safety standards that aim to prevent structural damage. Boring holes too close to the edge can compromise the structural integrity of the wood member. The specified distance allows for sufficient material around the hole to maintain the strength of the wood and prevent the risk of splitting or weakening under stress, which is particularly crucial when the wood is subject to loads or environmental factors.

This guideline reflects best practices in construction and electrical installation, ensuring that any wiring installed within these holes does not lead to premature failure of the wood members or create safety hazards, such as exposed wiring due to wood degradation. By adhering to this minimum distance, builders and electricians help ensure long-lasting and safe installations.