1975 Trojan F30 Express - 3 Position Switch on Main Breaker Panel. What is this?

[Smokeleez]

Good day!

Hope you had a great boating season.

Question: Would anyone happen to know or recognize what this 3 Position Knob is for? What is it's purpose?

Position 1 = Shore Power. AC electricity is on throughout boat. Panel shows 120V
Position 0 = No Shore Power. No AC electricity.
Position 2 = No Shore Power. No AC electricity.

I do have an old Rediline Electric Generator in the hull (currently not hooked up to battery)
[attachment=0]Main Breaker Knob.jpg[/attachment][attachment=1]Main Electrical Panel.jpg[/attachment][attachment=2]1975 Trojan F30 Express.jpg[/attachment]


Thanks!
Ron

1975 Trojan F30 Express Flybridge
Twin Chrysler 318's

[captainmaniac]

Probably Shore Power / AC Shut Off / Generator. My F32 is a '79 and the switch in it actually says those things, not just numbers.

[prowlersfish]

Probably Shore Power / AC Shut Off / Generator. My F32 is a '79 and the switch in it actually says those things, not just numbers.

J agree

[WayWeGo]

Our F-36 is also a 1975 model and I was surprised to find out the AC circuits are all wired with Romex solid core wiring. You might have the same thing on your boat.

We are replacing all that house type wiring with tinned stranded wiring. It should be a fun project!