Based on the higher current calculated for either leg, a minimum

50-ampere supply cord is required. For SI units: one square foot = 0.093 square meter; one foot = 0.3048 meter. (c) Optional Method of Calculation for Lighting and Appliance Load. For mobile homes, the optional method for calculating lighting and appliance load shown in Section 220-30 and Table 220-30 shall be permitted. 550-14. Interconnection of Multiple Section Mobile Home Units. (a) Fixed-type Wiring. Approved and listed fixed-type wiring methods shall be used to join portions of a circuit that must be electrically joined that are located in adjacent sections of mobile homes after the home is installed on its support foundation. The circuit's junction shall be accessible for disassembly when the home is prepared for relocation. ARTICLE 550 - MOBILE HOMES AND MOBILE HOME PARKS 70-601 (b) Disconnecting Means. Multiple section mobile homes not having permanently installed feeders, and that are to be moved from one location to another, shall be permitted to have disconnecting means with branchcircuit protective equipment in each unit where so located that, after assembly or joining together of units, they shall not be interconnected on either the line side or the load side, except that the grounding means shall be electrically interconnected. (FPN): Subsection (b) above applies to connection of previously constructed mobile homes where multiple feeder assemblies were allowed. The present Code does not permit more than one cord or feeder to a mobile home. 550-15. Outdoor Outlets, Fixtures, Air-Cooling Equipment, Etc. (a) Listed for Outdoor Use. Outdoor fixtures and equipment shall be listed for outdoor use. Outdoor receptacle or convenience outlets shall be of a gasketed-cover type for use in wet locations. (b) Outside Heating Equipment, Air-Conditioning Equipment, or Both. A mobile home provided with a branch circuit designed to energize outside heating equipment or air-conditioning equipment, or both, located outside the mobile home, other than room air conditioners, shall have such branchcircuit conductors terminate in a listed outlet box, or disconnecting means, located on the outside of the mobile home. A label shall be permanently affixed adjacent to the outlet box and contain the following information: This connection is for heating and/or air-conditioning equipment. The branch circuit is rated at not more than amperes, at volts, 60-Hertz, conductor ampacity. A disconnecting means shall be located within sight of the equipment. The correct voltage and ampere rating shall be given. The tag shall be not less than 0.020-inch (508-micrometer) thick etched brass, stainless steel, anodized or alclad aluminum, or equivalent. The tag shall not be less than 3 inches (76 mm) by 1³/₄ inches (44.5 mm) minimum size. C. Services and Feeders 550-21. Distribution System. The mobile home park secondary electrical distribution system to mobile home lots shall be single-phase, 120/240 volts, nominal. For the purpose of Part C, where the park service exceeds 240 volts, nominal, transformers and secondary distribution panelboards shall be treated as services. (FPN No. 1): See Table 550-22 for calculation of load. (FPN No. 2): See Section 550-4(b) for mobile homes not located in mobile home parks. 550-22. Minimum Allowable Demand Factors. Park electrical wiring systems shall be calculated (at 120/240 volts) on the larger of (1) 16,000 voltamperes for each mobile home lot or (2) the load calculated in accordance with Section 550-13 for the largest typical mobile home that each lot will accept. It shall be permissible to compute the feeder or service load in accordance with Table 550-22. No demand factor shall be allowed for any other load, except as provided in this Code. 70-602 NATIONAL ELECTRICAL CODE Table 550-22. Demand Factors for Feeders and Service-Entrance Conductors Number of Demand Factor Mobile Homes (percent) 1 100 2 55 3 44 4 39 5 33 6 29 7-9 28 10-12 27 13-15 26 16-21 25 22-40 24 41-60 23 61 and over 22 Service and feeder conductors to a mobile home in compliance with