Heavy Duty Power Outlet. The increasing number and variety of portable electrical tools and gear call for conveniently located receptacles. Midwest Electric heavy duty power outlets deliver, with one or more receptacles, with or without circuit breakers, in a single NEMA 3R enclosure. This eliminates the need for multiple, separately mounted components while providing maximum protection against weather and normal field use. NEMA 3R weatherproof enclosure. G90 galvanized steel construction for superior corrosion protection. Durable polyester powder coat finish resists chipping and fading.