It is interesting to note that the NESC requires 16 feet of clearance under the worst of conditions (winter with ice load or on the hottest summer day at the expected maximum load on the conductors). If this is a residential driveway and a triplexed service drop, the height may be reduced to 12.5 feet if the height of the building doesn't permit 16 feet of clearance. [Linked Image]

Charlie Eldridge, Indianapolis Utility Power Guy