The regulations set forth in this section shall apply to all electrical utilization equipment which operates at more than twenty-five volts, or which transmits, transfers, or utilizes more than fifty watts in trailer parks and trailer coaches in trailer parks, and also applies to the installation of transformers, service equipment, and other equipment used for supply or control of electrical energy when such equipment is installed in trailer parks or in trailer coaches which are located in trailer parks. All wiring, where not specifically covered by this title, shall be installed in accordance with the Electrical Safety Orders of the State of California, General Orders 95, of the State of California, or any other state laws that may apply to wiring.
A. Service Wiring. All service wiring from main service panel to trailer sites, utility buildings, and to all points within the trailer park shall be buried underground. Insofar as practicable, all wiring upon or in a building shall be enclosed within the walls thereof, and all wiring not so enclosed must be of an approved type.
B. Service and Feeder Capacity. Service and feeders shall be determined on one-hundred-percent demand on first ten spaces, eighty percent on second ten spaces, and fifty percent for all over the first twenty spaces. Service and feeders shall be calculated on the basis of two thousand four hundred watts (twenty amps, one hundred twenty volts) minimum per site up to twenty-five feet in length, three thousand six hundred watts (thirty amps, one hundred twenty volts) minimum per site for all trailer sites over twenty-five feet in length. No demand for other loads shall be allowed on branch circuits for individual trailer sites.
C. Overcurrent Protection. The maximum size overcurrent protection shall not exceed the rating of the receptacle at the trailer site. Other sizes of overcurrent protection shall be in accordance with subsection H of this section.
D. Grounded Capacity. There shall be a grounded receptacle at all sites based on a minimum of twenty amps for all sites up to twenty-five feet in length and twenty amps minimum for all sites over twenty-five feet in length but in no case shall the receptacle be rated less than the overload protection used.
E. Wire Sizes. Wire sizes in utility buildings shall be as follows:
1. Lighting circuits, No. 14 wire with 15-amps fuse, 12 outlets maximum;
2. Appliance circuits, general, No. 12 wire with 20-amp fuse, 8 outlets maximum;
3. Appliance circuits, laundry room, No. 12 wire with 20-amp fuse, 2 outlets maximum.
F. Branch Circuit Loads. Two or more motors each not exceeding one horsepower in rating and each having a full-load rated current not exceeding six amps may be used on a branch circuit only if it is protected at not more than twenty amps at one hundred twenty-five volts or less, or fifteen amps at six hundred volts or less. Individual running overcurrent protection is not required, unless the motor is automatically started or is out of sight of the starting location.
G. Vertical Clearances. The minimum vertical clearance for wire which carries not to exceed seven hundred fifty volts at lowest point of sag shall be as follows:
1. Above streets and along streets in a trailer park, twenty feet;
2. Above area (other than thoroughfares) where it is possible to drive vehicles, sixteen feet;
3. Above areas accessible to pedestrians only, twelve feet;
4. Above structures, eight feet
Trailer shall be considered a structure when parked on site. "Thoroughfare," as used in this section, means any public or private highway, avenue, street, road, alley, or other place generally used for vehicular use.
H. Conductor Capacities. The allowable capacities of conductors, in amperes, shall be:
Size AWG MCM | Rubber Type R, Type RW, Type RU, Type RH Thermo-Plastic Type T, Type TW Amperes | Weatherproof and Outside Wiring Amperes |
Size AWG MCM | Rubber Type R, Type RW, Type RU, Type RH Thermo-Plastic Type T, Type TW Amperes | Weatherproof and Outside Wiring Amperes |
12 | 20 | 30 |
10 | 30 | 35 |
8 | 40 | 50 |
6 | 50 | 70 |
4 | 70 | 90 |
3 | 80 | 100 |
2 | 90 | 125 |
1 | 100 | 150 |
0 | 125 | 200 |
00 | 150 | 225 |
000 | 175 | 275 |
0000 | 225 | 325 |
I. Voltage Drop. Voltage drop shall not exceed five percent on distribution system (demand load).
J. Overhead Wiring. All outside and overhead wiring shall conform to the standards of the California Public Utilities "Rules for Overhead Line Construction." All overhead wiring within the park shall be covered with double-braid weatherproof or better insulation.
K. Outdoor Control Equipment. All switches, receptacles, and control equipment located outdoors shall be in a weatherproof or six-sided enclosure so constructed or protected that exposure to the weather will not interfere with its successful operation.
L. Utility Building Lights. All lights in utility buildings must be switched. Pull chains are prohibited.
M. Protective Devices. All overcurrent protective devices on branch circuits shall be nontamperable.
N. Control Equipment. Control equipment shall be located not less than three feet nor more than six feet six inches above the ground or with a permanent working platform. Sufficient space shall be provided and maintained about electrical equipment to permit ready and safe operation. Where parts require examination, adjustment, or repair during operation or while live parts are exposed, adequate working space shall be provided and maintained to permit this work being performed safely. This workspace shall not be less than two and one-half feet.
O. Trailer Service Supply The service supply for each trailer site shall terminate on the same side of site as the sewer trap.
P. Submission of Specifications. An electrical diagram and complete specifications acceptable to the building inspector shall be included with each set of drawings submitted for a building permit.
Q. Underground Wiring. Where wiring is required to be buried underground, underground direct burial cables shall be used. It shall be a minimum of two feet in the ground and protected from damage with a covering prior to backfilling the trench. Covering shall be two-inch by six-inch redwood or equivalent. Cable shall not be permitted less than one-foot radial distance from water, sewer, or gas line.
R. Workmanlike Installation. All electric wiring, fixtures, and equipment shall be installed in a safe and approved workmanlike manner, and maintained to the satisfaction of the building inspector.
S. Awning Outlets. No electrical outlets shall be installed or used within any awning other than those installed on the exterior of a trailer coach.
(Prior code § 17.16.240 (A--U) (Ord. 503 § 15.5(a)--(u), 1961))