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The THOMAS BETTS FD1-TB is a single-gang rectangular electrical device box constructed from zinc-plated iron for durable, corrosion-resistant performance. Designed for use in standard residential and light commercial electrical installations, this device box measures 2.75 inches in overall width and is rated for non-weather-resistant applications. It features one 0.5-inch knockout to accommodate common conduit and cable entries. Licensed electricians install this box during rough-in phases to house outlets, switches, and other single-gang wiring devices in accordance with NEC requirements.
This box is suited for interior wall and ceiling rough-in applications in residential and light commercial construction. It is typically used where a single wiring device — such as a receptacle or toggle switch — must be secured within a code-compliant enclosure. The iron body and zinc-plated finish make it a dependable choice for standard dry-location electrical work where a sturdy, rigid enclosure is needed over plastic alternatives.
Designed as an OEM-style replacement and standard rough-in fit for single-gang device applications requiring a rectangular iron enclosure in non-weather-resistant interior locations.
Installation should be performed by a licensed electrician in accordance with applicable NEC requirements. Ensure all circuit power is de-energized and verified with a meter before mounting or wiring. The 0.5-inch knockout should be removed cleanly using a knockout punch or screwdriver and hammer before pulling conductors. Do not use this box in outdoor, wet, or damp locations, as it is rated for non-weather-resistant applications only.
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