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+--- Thread: A/C overload on Sovran 4300 (/showthread.php?tid=4743)
A/C overload on Sovran 4300 - mobil1 - 07-25-2017
At my slip or any marina when i plug into shore power 50/60 AMP and turn on 1/2 of the devices in the boat, I trip the breaker. Even if I am running 2 AC's and turn on the hot water heater, it trips. I understand that the HW heater draws 15 amps, but I am told the boat draws too much power. Any thoughts?
Scott
RE: A/C overload on Sovran 4300 - borcheb - 07-25-2017
check to ensure your power stanchion is truly 50 amp or two 30 amp services in separate phases. I had the same problem at our yacht club and we found that the two 30amp plugs were in the same phase and not delivering 60amp of service when combined. I am not an electrician, but our electrician quickly identified the issue when he took the stanchion apart.
RE: A/C overload on Sovran 4300 - jclark003 - 07-25-2017
So you have traveled to multiple marinas and seen the same problem? And you are tripping the pedestal breaker and not be ships inlet breaker? If so I would first suspect your cable end and or receptacle (depending on whether you have a cablemaster). If There isn't a good connection, arcing will occur between the cable end and receptacle creating a much higher amp draw (and fire hazard). If the prongs in the cable look burnt or the cable ends get hot After a sustained medium load then you may want to put a new end on or get a new cable. .
Do you know if your ship is equipped with an isolation transformer? If so I wouldn't be surprised if a short in the transformer windings can cause the same problem.
if your not experienced with AC electrical gettting a professional to help may be money well spent. Most boat fires are due to shore power connection issues, not to mention the inherent danger of electrocution from high voltage.
RE: A/C overload on Sovran 4300 - mobil1 - 07-26-2017
Thank you for both replies. I agree, it is time to bring in the pros....