Midwest Tool GS1202B20UL Manual Transfer Switch 200A

Product Description

The MIDWEST TOOL GS1202B20UL is a manual transfer switch rated for 200 amperes on both the main and emergency circuits at 120/240 volts AC single-phase. Built for generator connection applications, it carries a 10,000-ampere short circuit rating and is housed in a NEMA 3R enclosure constructed from G90 galvanized steel with a polyester powder-coat finish. The all-in-one factory-assembled construction includes bus bars that interconnect the main and standby switches, reducing field wiring time and minimizing termination errors. A licensed electrician performs the installation under applicable NEC requirements. The unit accepts aluminum or copper conductors sized from 6 AWG to 250 KCMIL.

This transfer switch is designed for residential and light commercial generator hookup scenarios where a manual switching method is acceptable. The NEMA 3R enclosure rating makes it suitable for outdoor or semi-protected indoor locations exposed to rain or sleet. The two-pole configuration supports standard single-phase 120/240-volt service, the most common configuration in residential utility feeds. The included 2-inch conduit hub simplifies wiring entry. Optional neutral kits are available for both 240-volt and 600-volt configurations, providing flexibility for different service arrangements.

Key Features

• Break-before-make switch mechanism prevents simultaneous connection of utility and generator sources
• All-in-one construction with factory-assured terminations reduces installation time and wiring errors
• Bus bars interconnect main and standby switches for a compact, integrated assembly
• Door interlock allows opening only when the switch is in the Off position, reducing arc-flash exposure
• Padlock provision on door supports lockout/tagout compliance
• NEMA 3R galvanized steel enclosure with polyester powder-coat finish rated for outdoor use
• UL listed for both Canada and the United States

Compatibility

Designed for generator transfer applications on single-phase 120/240-volt services. Accepts aluminum and copper conductors from 6 AWG to 250 KCMIL. Optional neutral kits available for 240-volt and 600-volt configurations.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. Disconnect and lock out both the utility service and the generator before beginning any wiring work. Verify that the generator output rating does not exceed the 200-ampere emergency current rating of this switch. Conduit entry is provided via the included 2-inch hub; additional knockouts may be available for multi-conduit installations.

Technical Specifications

• Type: Manual
• Voltage Rating: 120/240 volts AC, 1-Phase
• Main Current Rating: 200 amperes
• Emergency Current Rating: 200 amperes
• Short Circuit Rating: 10,000 amperes
• Number of Poles: 2
• Wire Type: Aluminum/Copper
• Wire Size: 6 AWG to 250 KCMIL
• Enclosure: NEMA 3R
• Height: 35 inches
• Width: 15.75 inches
• Depth: 7 inches
• Material: G90 Galvanized Steel
• Finish: Polyester Powder Coated
• Includes: 2-inch conduit hub
• Approvals: UL Listed (Canada and US)
• Weight: 46.35 pounds

Standard Information

• Brand: MIDWEST TOOL
• Manufacturer Part Number: GS1202B20UL