Thanks for the information which totally makes sense. I have spent two days trying to trace the power cables to locate the EFCI, without success. I must have a GFCI outlet tripped as that is my main problem, no power in any of the outlets. Our boat has two AC panels, one under the Nav Station for the two A/C Units and one forward of the Nav Sta for shore power, battery chargers, outlets etc…OK. On my boat (Beneteau) there is only one breaker on the AC power distribution panel for all AC receptacles / outlets. On the first AC receptacle on the port & starboard side of the cabin, that is closest to the distribution panel , is a GFCI receptacle for the entire run of outlets on either side of the cabin. That first GFCI receptacle has a breaker or reset button as well as a test button to test the functioning of the GFCI. If the GFCI trips, the entire downstream bank of receptacles become inoperative. Note that the downstream receptacles are not GFCI receptacles; however, they provide the safety & features of the GFCI receptacle that they are wired through.
One additional note. On two occasions, I had an amber ground fault indicator light on the AC distribution panel that was caused by a faulty shore power receptacle on the boat. I did have AC power to some of the equipment; however none of the GFCI’s were operational as well as none of the receptacles.Thanks again for the info!
Usually installed infront of the main breaker ,by ABYC code within 10 feet of shore power input/ Mine is in panel at nav desk installed on a DIN rail before main at A/C panelA 2003 boat would not have had an ELCI breaker, but if retrofitted it would be your main shore power breaker. ELCI is essentially GFCI for boats. "Equipment Leakage Circuit Interrupt "