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The Crouse-Hinds TP428 extension ring is designed for use with a 4-inch square steel outlet box. Constructed of steel, this extension ring measures 4-inch x 4-inch x 1-1/2-inch and is 2-1/8-inch deep. It features eight 1/2-inch and four 3/4-inch side knockouts for easy installation of electrical devices in exposed work applications and has a capacity of 21 cubic inches. The extension ring is UL listed.
The Crouse-Hinds TP428 steel extension ring provides additional wiring capacity and facilitates easy installation with multiple knockouts and a durable steel build.
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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