power supply
Moderators: BeaconMarineBob, Moderator, BeaconMarineDon
power supply
i show this on my power supply....red light on the left with reading pegged to the right...on right gauge shows working...i unplug shore power and red light goes off..but gauges stay the same...could i have a polarity problem?
1979 321 Trojan
- prowlersfish
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Re: power supply
i asume shore power ? Are you using bothe cables ? Check the voltage to make sure you not getting 220 on one side and check the polarity .
Boating is good for the soul
77/78 TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat
77/78 TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat

Re: power supply
using both cables and all outlets are on and working..headers, hot water,etc no sign of 220
1979 321 Trojan
- prowlersfish
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Re: power supply
Did you check with a volt meter on the boat and on the dock ? That should be the first thing . You can get a polarity test at a hardware store and check polarity of the outlets . Have you tried swaping the cords at the dock ? Does the issue change sides ?
Boating is good for the soul
77/78 TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat
77/78 TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat

- RWS
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Re: power supply
heres a cube style polarity tester
Should be 1 on every boat
cost $10
RWS
https://www.amazon.com/Receptacle-Teste ... NrPXRydWU=
Should be 1 on every boat
cost $10
RWS
https://www.amazon.com/Receptacle-Teste ... NrPXRydWU=
1983 10 Meter SOLD after 21 years of adventures
Yanmar diesels
Solid Glass Hull
Woodless Stringers
Full Hull Liner
Survived Andrew Cat 5,Eye of Charley Cat 4, & Irma Cat 2
Trojan International Website: http://trojanboat.com/
WEBSITE & SITELOCK TOTALLY SELF FUNDED
Yanmar diesels
Solid Glass Hull
Woodless Stringers
Full Hull Liner
Survived Andrew Cat 5,Eye of Charley Cat 4, & Irma Cat 2
Trojan International Website: http://trojanboat.com/
WEBSITE & SITELOCK TOTALLY SELF FUNDED
- prowlersfish
- 2025 Gold Support
- Posts: 12723
- Joined: Sat Nov 05, 2005 6:56 pm
- Location: Lower Chesapeake Bay ,Va
Re: power supply
Exactly !RWS wrote: ↑Wed Mar 17, 2021 6:41 am heres a cube style polarity tester
Should be 1 on every boat
cost $10
RWS
https://www.amazon.com/Receptacle-Teste ... NrPXRydWU=
Boating is good for the soul
77/78 TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat
77/78 TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat

- P-Dogg
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Re: power supply
I'll see your polarity tester and raise you a volt meter. Also serves to trip GFCIs, if you're into that kind of thing....
https://smile.amazon.com/gp/product/B08 ... UTF8&psc=1
https://smile.amazon.com/gp/product/B08 ... UTF8&psc=1
I needed a less expensive hobby, so I bought a boat!
Re: power supply
At minimum you need new gauges.
She was a 1969 36 ft wooden beauty with big blue 440s that we'll miss forever.
And thanks to the gang, 2012 Trojan Boater Of The Year
And thanks to the gang, 2012 Trojan Boater Of The Year
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Re: power supply
Do you have the cross tie switch and if so is it in the right position for both cables connected ?
-
- Moderate User
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- Joined: Sun Sep 09, 2012 11:30 am
Re: power supply
There was an option that allowed you to power up both sides of the panel when only one shore power cord was connected. The breaker /switch was one of those lower ones on your 120 panel.The switch had to be in the correct orientation when both cords were used. Just a thought as it used to throw me if I wasn't watching. As I remember those polarity indicators were a bit on and off on our boat and I replaced the volt meters a few times.