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General Activities => Main Message Board => Topic started by: Rortega46 on August 12, 2019, 07:46:21 PM

Title: Replace DC panel circuit breaker
Post by: Rortega46 on August 12, 2019, 07:46:21 PM
My AB fridge was tripping the “Refrigerator” circuit breaker on the DC panel.  After searching for frayed wire, I swapped the wiring to the breakers for the “Steaming Light” & “Refrigerator” and after a week the breaker has not tripped.  It’s time to change the breaker.

The breaker has “Airpax Cambridge MD” imprinted on it, has a sticker with “I 10 D 72”, and is approximately 2” x 3/4” x 1 3/4”H.  Does anyone know the model # of this 10A breaker and the best place to buy a replacement?
Title: Re: Replace DC panel circuit breaker
Post by: Roc on August 13, 2019, 04:23:00 AM
You should be able to find a 10A breaker at West Marine.  Or you can look on-line for a better price.
Title: Re: Replace DC panel circuit breaker
Post by: Geoffreykwright on August 13, 2019, 06:11:40 AM
Just out of curiosity, what does D 72 indicate? (I get the I 10).
Title: Re: Replace DC panel circuit breaker
Post by: Ekutney on August 13, 2019, 10:53:49 AM
Is this a push/push breaker?  Push to reset & Push to turn off?

If so a source is:
https://www.amazon.com/gp/product/B00DECXBA2/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1
Title: Re: Replace DC panel circuit breaker
Post by: Rortega46 on August 13, 2019, 11:44:49 AM
I assume the 10 is for 10 amp but do not know what the I, D and 72 stand for.  I don’t think this is a push/push breaker but an OEM switch breaker on the DC side of the main circuit breaker panel above the nav station. 
Title: Re: Replace DC panel circuit breaker
Post by: Stu Jackson on August 13, 2019, 11:49:47 AM
I just did a search on "circuit breaker ratings" and there are three detailed hits that may answer your question.  If not, an internet search certainly should.  Sorry, I used to know but forgot...happens a lot these days!  :D
Title: Re: Replace DC panel circuit breaker
Post by: Geoffreykwright on August 13, 2019, 12:00:20 PM
I assume the 10 is for 10 amp but do not know what the I, D and 72 stand for.  I don’t think this is a push/push breaker but an OEM switch breaker on the DC side of the main circuit breaker panel above the nav station.

I is the electrical symbol for current - so I 10 means 10 amp.  Gonna try and find out what D and 72 refer to...
Title: Re: Replace DC panel circuit breaker
Post by: Noah on August 13, 2019, 12:44:59 PM
A company named “Square D” makes breakers and maybe that is a brand model/designator? Just a guess.
Title: Re: Replace DC panel circuit breaker
Post by: Geoffreykwright on August 13, 2019, 01:14:53 PM
Had also thought 'D' could stand for DC.  And DC breakers seem to be rated B,C,D for the amount of current over the rated amount before they trip.  Neither of those explain the 72 though....
Title: Re: Replace DC panel circuit breaker
Post by: Rortega46 on August 16, 2019, 09:55:14 AM
FYI, West Marine had an exact replacement for the OEM 10 amp fuse.  Specs on the OEM breaker are F.L. amps 10, max volts 65/250, hertz DC/60, delay 72, trip amps 13.5 and cust p/n C130.  This info is on the side of the breaker.
Title: Re: Replace DC panel circuit breaker
Post by: Noah on August 16, 2019, 09:57:45 AM
“D 72” - delay 72. Mystery solved! :D