What term describes materials used to support open conductors?

What term describes materials used to support open conductors?

• A. Porcelain or glass insulators
• B. Minimum spacing required between conductors
• C. Feeder and/or branch circuit mast
• D. Multiwire branch circuit

Answer: (A)

Open conductors need a nonconductive support that both holds them in place and prevents current from flowing into the support. That nonconductive material is an insulator. Porcelain or glass insulators are classic examples because they resist weathering and have high dielectric strength, keeping the energized conductor safely isolated from the pole, crossarm, or mast. The other options describe a spacing guideline, a physical mast, or a circuit arrangement—not the insulating material itself.

Open conductors need a nonconductive support that both holds them in place and prevents current from flowing into the support. That nonconductive material is an insulator. Porcelain or glass insulators are classic examples because they resist weathering and have high dielectric strength, keeping the energized conductor safely isolated from the pole, crossarm, or mast. The other options describe a spacing guideline, a physical mast, or a circuit arrangement—not the insulating material itself.