The following requirements are intended to improve the quality of the above-mentioned National Electrical Code and shall be strictly enforced on all jobs installed in the city:
(A) In every installation where an electrical meter or transformer is involved in the neutral grounding of the main electrical box or panel, a minimum inch copper weld ground rod extending into the ground a minimum of eight feet shall be used with an approved ground rod clamp and a minimum No. 6 AWG soft drawn copper ground wire.
(B) Service-drop conductors, serving a dwelling when not in excess of 600 volts shall have minimum clearance from the ground of 12 feet above finish grade, sidewalk or from any platform or projection from which they may be reached.
(C) All motors exceeding five horsepower in size shall be equipped with starting compensators and all motors of more than 25 horsepower must be of the slip ring type; except, that the city reserves the right, when in its opinion the installation would not be detrimental to the service of the city, to permit other types of motors. Motors of ten horsepower and larger which are frequently started shall be equipped with over-current protective devices in each phase conductor and with starting equipment set to a limit of 300% of full load current, or 65% of locked motor current value. Motors of ten horsepower and larger having intermittent or continuous duty shall be equipped with overcurrent protective devices in each phase conductor and also with starting equipment set to a limit of three hundred percent of full load current, except where served from a separate transformer installation and no other consumer is served from the same bank of transformers.
(D) For underground services, the size and rating for conductors shall have sufficient ampacity to carry the load selected from table 310-16 of the National Electrical Code. Grounding electrode conductors for a.c. systems shall be taken from table 250-94 of the National Electrical Code. All underground conduits shall be two and one-half inches without any bends and buried 18 inches under finished grade. Conduits with bends shall be three inches and buried 18 inches under finished grade with the approval of the Building Inspector. All conduits shall be installed by the Electrical Contractor.
('90 Code, § 7-30) (Ord. passed 4-12-76; Am. Ord. passed 10-14-85) Penalty, see § 151.99