Shore power red indicator light NEED HELP

[stewart]

Position 3 STB 240 volt red indicator light does not light up when selected and shore power connected and working, I opened the AC main switching pannel found two 250 v 3 amp buss fuses blown, after replacing and repowering the two fuses blew again, does anyone have any ideas or experience with this? all other red warning lights work, and now I can not
find new fuses, they are 3/8 inch across top and 1 1/2 inch long,Buss
F07A 250V 3A .
Cheers Stewart

 

[rwetherington]

more than likely the light holder had a short internally call Sams they sell them

 

[stewart]

I just checked the ac panel, indicator lites not shorted as far as I can tell,
turned off all panel switches put in 2 good fuses turned on ac at dock
heard a click at boat 2 more blown fuses, power to boat all good after selected,
however transformer output shows 262 volts ac, any more ideas?
Stewart

 

[MicroKap]

Do you have a boost transformer? If so, the boost may be engaged. The boost is usually used to increase voltage from 208V to approximately 240V. On docks where 240V is available, boost has to be turned off. Boost should also be turned off when using the generator. If it's not an automatic feature on your boat, look for a manual switch that would take the "boost" out of the circuit. Typical boost would be 10%, which would show as 240V x boost of 10% would give you 264V.

 

[REBrueckner]

You often can't just look at something a "see" a short.....test it with an ohmmeter...after shutting off all power....

 

[stewart]

Tested all circuits with ohmeter, panel imput and all output amper guages
read 0 fuses in the mail from Sams, thanks all
Stewart