Over the years, I have replaced the male end of a few 30-amp extension cords quite easily by using the repair ends available from camping supply outlets. If the receptacle end is needed, those stores do not stock it. However, that end is available from Home Depot, Lowe’s and electrical supply stores. A plastic receptacle box and blank cover with rubber gasket work nicely. The blank cover simply needs a centered 2 1⁄8-inch hole to accommodate the flush 30-amp receptacle. Frank Woythal, Andover, New York
