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The raintight NEMA 3R power inlet box is designed for the use with the Pro/Tran transfer switches and Reliance Panel/Link manual transfer panels and generator-ready load centers. The power inlet box may be installed indoors, or outdoors in an open area where the generator is being used. Using one of the four combination 1/2-inch and 3/4-inch knockouts (one on each side, bottom and back) the power inlet box can be wired directly to the transfer switch or panel. The exclusive patented design provides generous wiring space and facilitates rough-in. The PR Series includes circuit breakers that match the amperage of the power inlet. UL listed.


  • Outdoor NEMA 3R power inlet box
  • May be installed outdoors up to 100 feet from a home's load center so your generator can be plugged in outside, away from open doors or windows
  • Designed to be hard-wired directly to Reliance transfer switches with building wire
  • Four combination 1/2" and 3/4" knockouts (one on each side, bottom and back)

    Specifications: Model PB50 Amps 50 Max. Generator Running Watts 12500 Max. Generator Input 50A@125/250VAC

    Dimensions H X W X D [inches] 6 x 4 x 2.63 Cabinet Type, Nema Outdoor, NEMA 3R Configuration CS6375 Connector Required CS6364

    • Measures 4 Inch x 6 Inch x 2-5/8 Inch
    • Current rating of 50 Amps
    • Suitable for use with Panel/Link transfer switches, Reliance Panel/Link manual transfer panels and generator ready loadcenters
    ColorAs Shown
    Dimensions2.6 x 4 x 6 inches

    Reliance Controls PB50 Generator Power Cord Inlet Box, 50-Amp

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