Electrical wiring is installed in war housing trailers being produced at Los Angeles by Western Trailer Company. S
6-volt batteries for clearance lights, stop lights, tail lights and porch light are run inside the wall space.
110-volt wiring is run under molding to provide easy access and to comply with local wiring regulations in various parts of the country.
Source: Farm Security Administration - Office of War Information Photograph Collection; Library of Congress Prints & Photographs Online Catalog (PPOC)