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The Fast, Safe and Easy Way to Feed Portable Generator Power to a Load Center
Reliance Controls ProTran 31404B 4-Circuit Indoor Transfer Switch
Reliance Controls Pro/Tran 31404B 4-Circuit Indoor Transfer Switch
Reliance Controls ProTran 31404B 4-Circuit Indoor Transfer Switch
Item# 77228
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  • Color Coded wiring for easy installation
  • Rugged powder-coated steel cabinet
  • 6 combination 1/2 inch and 3/4 inch knockouts
  • Non-defeatable (break-before-make) double-throw switches

Essential Info

The Pro/Tran 31404B indoor surface mount transfer switch is designed for fast installation in residential and commercial applications. The 18-inch flexible conduit whip attaches easily to the load center and all wires are clearly marked. Simply select the circuits needed in an emergency and connect them to the Pro/Tran wire leads.

Pro/Tran transfer switches feature a rugged powder-coated steel cabinet with six combination 1/2-inch and 3/4-inch knockouts, resettable branch rated circuit breakers and non-defeatable (break-before-make) double-throw switches.


More Info

Six Solid Reasons Why Pro/Tran is the Only Logical Choice

  1. Low Cost
    Surprisingly low. A fraction of the cost of a DPDT switch, sub-panel, power inlet, fittings, conduit, circuit breakers and wire. Pro/Tran transfer switches combine all these elements in a single, compact, ready-to-install unit.

  2. Fast Installation
    Extremely fast. That's because every Pro/Tran transfer switch is completely pre-wired. Simply attach the conduit, mount the cabinet, make the necessary connections in the load center and it's ready to use.

  3. Safe operation
    Ultimately safe. The double-throw, break-before-make switch action of each Pro/Tran circuit keeps the generator isolated from the utility at all times. This eliminates the danger of back feeding the utility and causing injury to repair crews as well as preventing utility power from feeding into the generator and causing damage or injury.

  4. Easy to Use
    Remarkably easy. Plug the generator cord into the Pro/Tran, or the optional power inlet box, start the generator and move the switches on the Pro/Tran from LINE to GEN. Now you have power to your critical circuits.

  5. High Flexibility
    Unusually high. Every indoor Pro/Tran model can be cord-connected or hardwired. All enclosures include six combination 1/2-inch and 3/4-inch knockouts and a wiring compartment with over 60 cubic inches of space. Models that include a power inlet on the front also include a cover for the power inlet opening that facilitates hardwiring. Models without a power inlet on the front include a covered opening that permits the installation of a power inlet for convenient cord connection. And by ordering the optional Flush Kit, every indoor surface mount unit can be easily flush mounted.

  6. Exceptional Quality
    Quite exceptional. Every Pro/Tran component is manufactured to exacting specifications and tested before assembly. Then each completed Pro/Tran is thoroughly tested before shipment from the factory. And this exceptional level of quality is backed by an exclusive two-year warranty.


ManufacturerReliance Controls
Manufacturer Product No.31404B
Maximum Watts7500
Max Single-Pole CircuitsFour
Max Double-Pole Circuits One
Max Combined Load60A
Max Load From Generator15A
Max Load From Load Center20A
Conduit Length18 Inches
Conduit Trade Size3/4 Inch
Dimensions7.5" H x 7" W x 4.5" D
Manufacturer WarrantyTwo Year Limited

Important notes:
Only merchandise credit for defective items returned within 30 days of purchase. No other returns allowed on this item.
Manufacturer contact information: Reliance Controls Corporation, Tel: (800) 634-6155


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