The ABB OZXA-400 is a terminal lug kit for OS400 and OT400 fusible and non-fusible disconnect switches. The kit contains six lugs accepting wire sizes from #2 to 600 MCM in copper or aluminum. This is the lug set you need when terminating larger feeders or load conductors on those switch frames — the range covers everything from a 2 AWG tap to a 600 MCM main.
The kit is designed specifically for the OS400 and OT400 disconnect switch enclosures. Mounting is straightforward — the lugs replace or supplement the factory terminations on the switch line and load side. Wire type is dual-rated Cu/Al, so no separate lug kit is needed when switching between copper and aluminum conductors on the same installation.