Is the electrical circuit correct?

The switch on the electric panel should always be left on so that anytime the bilge float switch closes the pump will come on. There is also additional wiring to cause a bilge pump on situation even if the float switch is open. This wiring not shown.

Thanks for the quick reply. My point is that in the currently diagram the pump will operate if told to do so by the float switch, even if the panel switch is off/open. I’m a mechanical engineer so I might be wrong, but I recommend getting an electrician to check the diagram. No worries either way - I think your course material is great!

To elaborate on Grant's comment, the manual switch in this diagram is not a normal panel switch - it is *not* intended to disable the bilge pump the way that a panel switch normally does. Often, there isn't even a switch provided for disabling the bilge pump circuit, because it's too important (and if there is one, you should always leave it in the ON position, as Grant mentioned). You're correct that the float switch will activate the bilge pump regardless of the manual switch. The purpose of the manual switch is redundancy: it gives you an *alternate* path to apply power to the bilge pump. *Either* switch being on powers the pump. Complete failure of the float switch is an obvious scenario where the manual backup is needed, but others can be imagined, as well.