Bare Conductors shall be supported in what fashion?

• A. 2 ft or less on suitable standoff insulators
• B. 1 ft or less on metal clamps
• C. 3 ft or less on plastic ties
• D. 4 ft or less on foam spacers

Answer: (A)

The main idea here is how bare conductors are mechanically supported while maintaining electrical clearance and safety. Bare conductors must be supported by nonconductive, rated supports so they don’t move, sag, or come into contact with structures or other conductors.

The best choice is to keep bare conductors supported at 2 feet or less using suitable standoff insulators. These insulators provide both mechanical support and electrical insulation, helping to prevent arcing and damage from wind or vibration, and they maintain the required clearance from other objects.

Other methods are not appropriate for bare conductors. Metal clamps can create a conductive path and risk electrical contact or corrosion; plastic ties and foam spacers typically aren’t rated for the mechanical and electrical demands of bare conductors and can allow movement or degradation over time. A longer spacing, like 4 feet, would allow too much sag and movement, increasing the chance of contact or arcing.