An operator adapter is required to install a disconnect in bulletin A21, A28, A34 and A4L3D Hoffman enclosures that have a universal cut-outOperator adapters include an adapter plate and additional components needed to interlock the master door with the disconnect operating mechanismInstallation instructions are included with each operator adapterEach brand and type of disconnect requires a different operator adapterBe sure to select the correct operator adapter and enclosure for the disconnect device selectedUsed on all Hoffman NEMA 4/12 disconnect enclosures with a universal flange cut-out400 A or greater disconnect switch and 600 A or greater circuit breaker require the large handle