Hi, Confused???🤔🤔😇😇. For somethings it is 110V AC, for other things it is 12V DC, Ground, Neutral, shorepower, wall power, house battery, solar power, inverter list goes on and on and on.... and confusion persists. Yacht, boat, RV electrical systems are really complicated and confusing because it uses both AC and DC systems simultaneously. And the currents in both the systems behave totally different ways. Not going to explain all the physics behind it here, but if interested, let me know, i can explain whole 9 yard when we meet😉. My point is if you hire a wrong tech who doesn't understand how the AC and DC currents behave and why we choose different types of cables for AC and DC wiring, your boat or RV can catch fire. For example google search -Skin effect in AC to know why we choose certain type of conductors for AC and thicker cable consisting many tiny wires for DC wiring. So , I have been doing this type of wiring , intallation, trouble shooting for more than 10 years. I have sound knowledge of electronics, and physics. I provide following services : - install and repair inverters, audio video systems. - troubleshoot AC /DC wiring. - install navigation systems. - install solar pannels. - install/ troubleshoot trim tab systems(electrical part only) I am reliable and affordable. I have good work ethics. Please text or call at 7787007100. Thanks for reading my ad. Please see my other ads for more services. Dan