Thomas & Betts BG Ground Bushing for 14-2/0 Wire Range

The BG ground bushing takes a bonding conductor from 14 AWG up to 2/0 AWG in its lug, so one part covers everything from a small equipment ground to a heavy service-size bonding jumper. All sizes in the BG line, 1-1/4 inch through 4 inch, carry the same 14-2/0 range.

Six trade sizes: 1-1/4 inch (BG125-14-20), 1-1/2 inch (BG150-14-20), 2-1/2 inch (BG250-14-20), 3 inch (BG300-14-20), 3-1/2 inch (BG350-14-20) and 4 inch (BG400-14-20). Note there is no 2 inch in that run, so if your raceway is 2 inch trade size you need a different bushing.

A solid ground bushing like the Thomas & Betts BG has to thread onto a free conduit end. Where the run is fixed in place, a split design such as the Bridgeport Mighty-Rite SGBS-388CL (3 inch) wraps the existing threaded end instead.

Use a split grounding bushing such as the Bridgeport Fittings SGBS-388CL Mighty-Rite insulated split grounding bushing in 3 inch, steel with an aluminum lug. It installs around conduit that is already in place, where the Thomas & Betts BG malleable iron bushing has to thread onto a free conduit end. Thomas & Betts BG covers 1-1/4 inch through 4 inch sizes.

Malleable iron body, not plastic and not die-cast zinc. That matters on larger raceways where the bushing is carrying a 2/0 bonding jumper and takes real torque from the lug screw.

A grounding bushing like the Thomas & Betts BG threads onto the conduit end and gives you a dedicated lug to land a bonding conductor, so you can run a jumper from the raceway to the enclosure ground bar or around a concentric/eccentric knockout. A bonding locknut only bites the enclosure metal; it gives you no terminal for a conductor. If your job calls for a bonding jumper sized to the circuit, you need the bushing.

Not quite. The ABB A-Series copper equipment grounding bushing is a box-bonded conduit fitting, so it bonds the conduit to the enclosure through the fitting itself. The Thomas & Betts BG is a malleable iron grounding bushing with a lug sized for 14 AWG to 2/0 bonding conductor, so it relies on a bonding jumper run to the ground bar. Confirm which method your drawing calls out before substituting.

The BG body is malleable iron. If the spec calls out a copper bushing, the ABB A-Series copper equipment grounding bushing is the box-bonded fitting to quote instead.

For MRO stocking, the BG family keeps the same 14-2/0 lug range across every trade size from 1-1/4 to 4 inch, so the bonding conductor your crew pulls does not change with the conduit size, only the part number does. Six part numbers cover that whole span.