De Clarke wrote: > So... I notice that marine/RV lights tend to be type 1142, with > twin conductors in the base of the bulb, whereas auto lights tend > to be type 1156, with one conductor in the base and the socket > connected to ground. > > Is there some reason why RVs and boats are different? is there > any reason not to use 1156 sockets for interior boat lighting? > If they are used, should care be taken to isolate the light fixture > from hull ground? > Autos sometimes have (not as much now) the car as part of the circuit, boats do not. You could use the 1142 as long as you make sure there is no way for the fixture to conduct to ground (center of bulb base should be positive anyway). -Ken
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