My boat has a main switch to disconnect the battery, and it switches the ground, not the 12V. Is this correct? Seems like it should switch power or there is power to the whole boat except for the last 12" of ground at the battery.
Technicaly, it is right... DC current flows negative to postive. <br /><br />As a matter of practice, the switch should be on the positive side as negative {-} is considered "common" or "ground".<br /><br />Someone else working on your boat maybe confused by your current setup, you would be wise to change it.Originally posted by waterone1:<br /> Switches should always be on the positive side...never negative. Whoever wired that battery switch on the negative side...did it wrong.