From Dominion Power's Blue Book; 290.3 covers the pertinent info, in red:
290 OVERHEAD POINT OF ATTACHMENT
290.1 For new construction the Customer will provide and maintain a safe and substantial support on
the building or structure to which the Company's service drop is to be attached. The Company will
furnish to the Customer at the Company's storeroom office the attachment device that will be installed
by the Customer.
290.2 The existing attachment device may not be suitable for terminating the service drop on a building
to be rewired. At Company request, the Customer at their sole expense will provide, install, and maintain
a safe and substantial support on which the Customer will install the new attachment device supplied by
the Company. Where the Company determines that a bolt is required through the wall of a building, the
Customer, at their sole risk and expense, will install a bolt furnished by the Company.
290.3 The attachment device shall be located such that personnel will not have to stand on a roof to
install the service drop. It must be workable from a ladder set on the ground. It shall not be installed on
a fire wall, parapet wall, chimney, belt of stone, brick or other material, a soldier course, an outside verge
board, an inside verge board, the upper three layers of brick, the fascia covering end of rafters, the end
grain of any wood member, siding between studs or any similar type construction, unless satisfactory
additional support is provided.
290.4 The attachment device will be located so that service drops and drip loops have a minimum of 3
feet* clearance from windows designed to open, doors, porches, balconies, fire escapes or similar
building openings. (* Exception: Conductors run above the top level of a window shall be permitted to
be less than the 3 feet requirement.)
290.5 The point of attachment should be 12 feet above final grade or higher due to service drop and
drip loop clearances. In no case shall this clearance be less than 10 feet. NEC Article 230.24B and NESC
Rule 234C3.