Which term describes a structure used to support conductor runs between poles or supports?

• A. Feeder and/or branch circuit mast
• B. Porcelain or glass insulators
• C. Drainage for a raceway
• D. Minimum vertical clearance for open conductors

Answer: (A)

Feeder and/or branch circuit mast describes a structure used to support conductor runs between poles or supports. In overhead distribution, you need dedicated supports to hold the conductors in place along the route. A mast is that kind of structure—often attached to a pole or mounted as a standalone post—that provides attachment points for the conductors, insulators, and hardware, keeping the lines elevated, properly spaced, and clear of the ground and obstacles. It specifically supports feeders or branch circuits as they run from one pole to the next.

Porcelain or glass insulators are the insulating components that keep the electrical path from energizing the pole or mast; they do not serve to support the conductors themselves. Drainage for a raceway relates to moisture management and is not a structural element. Minimum vertical clearance is a regulatory requirement about how low lines can sag or be placed, not a physical structure.