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The ECM INDUSTRIES LLC GSW-110 is a heavy-duty, moisture-proof toggle switch designed for demanding electrical service environments. It features a single pole single throw (SPST) configuration with a simple on/off function, making it a reliable choice for controlling single-circuit loads. The switch is rated at 20 amps and 125 volts, with a 3/4 HP motor rating, and includes an O-ring seal that protects internal contacts from moisture ingress. Screw terminals provide a secure, tool-tightened wire connection. Licensed electricians and qualified trades installers use this switch in applications where moisture exposure is a concern.
This toggle switch is suited for residential and light commercial installations where a moisture-resistant switching solution is required. Typical applications include pump control panels, outdoor enclosures, utility rooms, pool and spa equipment areas, and other locations where water or humidity may be present. The 1/2-inch mounting hole specification allows straightforward installation into standard knockout or drilled panel openings. The switch is sold in a package quantity of five units per carton, making it practical for service trucks or job-site stock.
Designed as a heavy-duty moisture-proof toggle switch for general single-circuit switching applications in residential and light commercial electrical systems where a 1/2-inch panel knockout and 20A/125V SPST switching capability are required.
Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. Always de-energize the circuit at the breaker panel and verify the absence of voltage before beginning any wiring work. Ensure the mounting surface is properly sized to the 1/2-inch recommended hole diameter and that the O-ring seats correctly against the panel face to maintain the moisture seal. Screw terminals should be tightened to the terminal manufacturer's standard practice using an appropriate screwdriver.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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