A distance of 1.75 inches from a nonmetallic conduit containing a high-voltage circuit is required when the circuit operates at above 100 Hz.

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Multiple Choice

A distance of 1.75 inches from a nonmetallic conduit containing a high-voltage circuit is required when the circuit operates at above 100 Hz.

Clearance between a nonmetallic conduit carrying a high‑voltage circuit and nearby surfaces must be maintained to prevent arcing and interference. When the circuit operates at frequencies above 100 Hz, the risk of capacitive coupling and induced voltages increases, so a minimum separation of 1.75 inches is required to keep insulation intact and reduce the chance of tracking or contact between conductors. This rule applies generally, not just for underground installations, so the statement is true.

Clearance between a nonmetallic conduit carrying a high‑voltage circuit and nearby surfaces must be maintained to prevent arcing and interference. When the circuit operates at frequencies above 100 Hz, the risk of capacitive coupling and induced voltages increases, so a minimum separation of 1.75 inches is required to keep insulation intact and reduce the chance of tracking or contact between conductors. This rule applies generally, not just for underground installations, so the statement is true.

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