Welcome to the Hatteras Owners Forum & Gallery. Sign Up or Login

Enter partial or full part description to search the Hatteras/Cabo parts catalog (for example: breaker or gauge)
+ Reply to Thread
Results 1 to 10 of 10
  1. #1

    Unhappy Circuit Breaker Surprise

    Hi all! We have a 58 LRC from 1975 that has thrown us for a loop. :^/

    1. Yesterday all the AC power dropped off. I checked the big AS panel at the helm and discovered the bottom right "Hatteras 120VAC Lines B and C" breaker had flipped.
    2. This is a big black 4-pole breaker sitting next to 2 white breakers.
    3. The white breakers are marked "FAULT" and "OVERVOLTAGE" respectively.
    4. After much investigation (read: 8 hrs of laborious troubleshooting) I've determined that the white "FAULT" breaker is tripping first, causing the black 4-pole breaker to follow suit.
    5. I disassembled ad examined all of the bow and stern shore power hookups - all is in order; no shorting, no burn marks, no loose wires.
    6. I opened up the big AC panel and examined the back side - all is well, nothing shorting, no burn marks, no out of place wires.
    7. I shut off all other AC circuit breakers in the entire boat to isolate individual systems. No change.
    6. I used shore power - no change. As soon as power is applied, the white breaker trips followed instantly by the black 4-pole Lines B and C breaker.
    7. I tried going off generator power - no change.
    8. I tried swapping a different white "FAULT" breaker from another part of the panel. No change!
    9 (Here's where it gets interesting) I decided to try leaving the "FAULT" breaker disconnected.
    a. I disconnected the "IN" wire to the white breaker.
    b. I flipped the black 4-pole breaker back on.
    c. I started the genset - and everything worked!!
    d. I shut id own and connected to shore power - and it worked.
    10. As long as I leave the white beaker disconnected all the AC system work normally.

    I left it on for long enough to charge the batteries, then shut it off. Anyone have ideas as to what is wrong or where to begin looking? Similar experiences?

    Thanks for any insight!

  2. #2

    Re: Circuit Breaker Surprise

    Think my first try would be to find/purchase and install a new fault breaker.
    Breakers do go bad and also GFCI outlets, hopefully it's as simple as that.
    CRICKET
    1966 HAT50C101
    Purchased 1985 12v71Ns
    Repowered 1989 with 8v92TI
    Repowered 2001 with 3406E

  3. #3

    Re: Circuit Breaker Surprise

    Yeah, I thot so too, but I swapped circuit breakers and the problem stayed with the location. It didn't move. Can't be the breaker.

  4. #4

    Re: Circuit Breaker Surprise

    All the breakers are old they may be weak. Install a brand new one hopefully that will resolve your issues.
    SEVEN
    1979 53' MY Hull #563
    Antioch, California

  5. #5

    Re: Circuit Breaker Surprise

    I've been using the new elci breakers on upgrades. 50 amps in a package that has reversed polarity indicators , power lights and all the necessary safety features. I'd put that at the inlet (no more fuses to deal with) and then all you need at the main panel is the legs and neutrals.
    Scott
    41C117 "Hattatude"
    Port Canaveral Florida.


    When I want your opinion I'll give it to you?

  6. #6

    Re: Circuit Breaker Surprise

    Quote Originally Posted by Boatsb View Post
    I've been using the new elci breakers on upgrades. 50 amps in a package that has reversed polarity indicators , power lights and all the necessary safety features. I'd put that at the inlet (no more fuses to deal with) and then all you need at the main panel is the legs and neutrals.
    Do you have a specific part number you use? I would love to ditch my fuses.
    1978 60C "Reel Action" Hull number 4 (304), 1986 36 Sedan "El Dorado" Hull Number 24 (324)

  7. #7

    Re: Circuit Breaker Surprise

    I'll PM a number. Call me tomorrow. It's not just a part number. The box (weatherized) and glands need to be added too.
    Scott
    41C117 "Hattatude"
    Port Canaveral Florida.


    When I want your opinion I'll give it to you?

  8. #8

    Re: Circuit Breaker Surprise

    He said swapping in another one made no difference anf the problem staid with the location... ie the thing may actually be doing its job.

    Time to get a multi meter on there to see if you may actually have a ground fault. Happy hunting, these things can be a pain.
    Currently boatless, but looking. Avatar is my first boat. Holland, 1966-ish.

  9. #9

    Re: Circuit Breaker Surprise

    I had this exact issue some months ago. After talking with many, I finally spoke with Hatteras (got number and name from SAMS). the Electrician who wired my boat in 1975 explained how compressors cause an extremely brief GF. As the GFCI breakers get old, they will trip more quickly. Has went on to say if I had GFCI outlets at all the "wet Location" like ABYC requires, then that old (now obsolete) white fault breaker needs to be disconnected. I cut the white wire and have had no more issues. You have done the correct repair.
    riverrandy
    1975 64' MY Hull# 305
    Seabrook, Texas

  10. #10

    Re: Circuit Breaker Surprise

    Randy, that's amazing you were able to talk to the electrician who wired your boat. I'd love to get that number from you.

    UPDATE: I spent this entire weekend working it and i finally got it down to, "any time the 240vac service #1 is hot, the 120vac service B and C fault breaker pops". Then, in an attempt to discern if the problem was upstream or down stream of the fault breaker, I disconnected all 4 wires from the bottom side of the fault breaker block. The problem went away. I reconnected all the wires, and the problem is gone. I can't explain it; all I know is I can no longer replicate the problem. It doesn't exactly give me a lot of confidence.

    Also, the PO removed all air conditioning from the boat, so the only compressors are the air compressors I have for the toilet system (1) and the air horn (1).

    I had all breakers and systems switched off during the troubleshooting to eliminate them. The breaker kept popping, indicating to me it's a power source problem. I hate to go with it as is - I can see the accident report now: Captain disabled his short protection and boat burn at sea...

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts