On most boats the 12 volt negative bus is the common point or zero voltage reference for any measurement. Posted 04 14 2007 1053 am et us is there a way to test or verify the quality of my boats electrical system ground.
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How to test ground on boat. Simplest way is to take a test light hook it to positive power. Perhaps more important these snafus can cause stray current corrosion which can sink your boat by eroding away through hull fittings fasteners rudders shafts and drives. If you want to check on this distribution i. Test for continuity at the end of your cord that plugs into the dock with the cord pluged into the boat touch one lead to the nutral leg and one to the ground and see if you get a reading. Pervasive problems aboard boats are ground faults and short circuits. Check the voltage reading.
Ive seen boats where the main ground hooks to a board that other things then hook to. To test a dc circuit ground wire remove it from the appliance to which it is connected such as the radio heater fan or cigarette lighter. Testing my boats ground. Plug it bck into the dock unplug the boat and test for voltage at the neutral and ground for the dock. Anywhere it lights up is a ground. Set your multimeter to 20 volts dc.
This simple test uses the boats 12 volt direct current power and a 50 watt dc light bulb to test the boats entire ground system all the way through the dockside end of the shore power cord. Two hots a nuetral and a ground. Youll need a multimeter for both techniques. Heres how to smoke them out and enjoy better service from the batteries. Everything on your boat should be referenced to your engines running battery neg terminal unless you have a yacht and have an apu if you have a metal boat run a dedicated wire from the hull somewhere to the batt term. Posted 04 14 2007 0211 pm et us dave i am not sure if you are asking about the vessels 12 volt negative bus or about a 115 vac shore power system.
Where is the ground on a boat. Both can slowly but surely drain the batteries even with every switch turned off. An ample ground connection from the boat through the shore power cord to the dock all but eliminates the possibility of esd cause by your boat. Touch one probe to the end of the ground wire and the other probe to the appliance electrical post. This is a static ground not a current carrying ground.
Gallery of How To Test Ground On Boat
