The operating dolly is capable of being locked in either the ON or OFF position.
When locked in the ON position it will no longer operate as an isolator
Positive indication of the opening of the contacts is only
given when the green stripe can be seen on the dolly.

The Sentry main switch is designed to accept both
cable-in / cable-out and direct to busbar connections.
The Sentry main switch may be used as an isolating switch.
The Sentry switch disconnecter is capable of switching both resistive and inductive loads.