Based on the 2023 NEC.
Question: What is the minimum clearance required for an overhead span of a 240V feeder over a commercial area not subject to truck traffic?
See answer below.
Answer: 12 ft
Explanation: According to Sec. 225.18(2) of the 2023 NEC, not less than 12 ft is the required clearance for a feeder over "Commercial areas not subject to truck traffic where the voltage does not exceed 300V to ground."
Lupacchino is a senior design engineer with Gaylor Electric, Inc. in Noblesville, Ind. and serves as an alternate on NEC Code-Making Panel No. 3. He is currently licensed in more than 80 jurisdictions. He can be reached at [email protected]