Charles 100 Amp 220VAC A-B Selector w/ Aluminum Enclosure 93-ABSEL100I-A

The A/B Selector is a 2-input, 1-output auto-selector utilizing a "primary/secondary" selection method for input. When connecting to dockside power, it will automatically sense the incoming dockside AC source and transfer it to the output. When adequate AC power appears on the Primary input, the Secondary input is immediately disconnected and locked-out from operation (even if already in operation).