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Mobilehome Parks Program

Electrical Plan Requirements

Electrical plans for park developments must include at least the following information:

1. Electrical Distribution System Specifications
   1. Provide specifications of park service equipment and manufacturer.
   2. Specify the voltage, ampere and interrupting capacity rating, type and class of the overcurrent protective device in the park service equipment and ambient temperature design is based on. (See California Code of Regulations, Title 25, Chapter 2, Section 1142).
   3. Specify voltage, ampere, and interrupting capacity rating, type and class of overcurrent protective device for the primary system feeders and/or transformers.
   4. Specify type of conductors, i.e., (CU or AL), type of insulation, voltage rating and temperature rating.
   5. Provide specifications for transformers and unit substations.
   6. Specify primary and secondary voltages, KVA ratings and impedance of transformers.
   7. Provide specifications for secondary distribution panel boards or that portion of the unit substations.
   8. Specify voltage, ampere and interrupting capacity rating, type and class of the overcurrent protective devices for the secondary system feeders.
   9. If the system is installed or owned by a utility company, provide a letter confirming such service, including information regarding the point of termination. Complete electrical specifications, plans and calculations are required if the point of termination's do not comply with California Code of Regulations, Title 25, Chapter 2, Section 1184.
2. Electrical Plans
   1. Provide single line diagram of park electrical system, including the park lighting system.
   2. Indicate location(s) of all equipment devices and conductors in the system.
   3. Indicate circuit length, conductor size, and distance to center of load.
   4. Provide details of conduit installation and size.
   5. Provide details of conductor installation.
   6. Provide details of equipment installation and mechanical protective barriers, if required.
   7. Provide details of correct method of grounding system and equipment.
   8. Provide details of park lighting installations.
   9. Plans for systems exceeding 230 volts require the signature of a California registered engineer.
3. Electrical Calculations
   1. Submit load calculations for all loads served, not to exceed a total combined voltage drop of 5% for any total run.
   2. Include all buildings in load calculations.
   3. Submit written evidence from the serving utility indicating the available fault current at the park service. (See Required Local Government and Utility Agency Approvals page)
   4. Submit calculations utilized to determine interrupting capacity of overcurrent protective devices for each transformer.
   5. Submit calculations used to determine interrupting capacity of overcurrent protective devices for secondary system feeders.
   6. Submit park lighting calculations to verify compliance with California Code of Regulations, Title 25, Chapter 2, Section 1108.
   7. Calculations for systems exceeding 230 volts require the signature of a California registered electrical engineer.

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