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Author Topic: Replace DC panel circuit breaker  (Read 282 times)

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Rortega46

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Replace DC panel circuit breaker
« 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?
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Randy & Karla Ortega
2001 MKII Hull # 1532 M35BC
S/V Yat
New Orleans, LA

Roc

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Re: Replace DC panel circuit breaker
« Reply #1 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.
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Roc - "Sea Life" 2000 MKII #1477.  Rock Hall, MD

Geoffreykwright

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Re: Replace DC panel circuit breaker
« Reply #2 on: August 13, 2019, 06:11:40 AM »

Just out of curiosity, what does D 72 indicate? (I get the I 10).
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Sundowner III
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Ekutney

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Re: Replace DC panel circuit breaker
« Reply #3 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
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Ed Kutney
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Magothy River
Severna Park, MD

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Rortega46

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Re: Replace DC panel circuit breaker
« Reply #4 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. 
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Randy & Karla Ortega
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Stu Jackson

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Re: Replace DC panel circuit breaker
« Reply #5 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
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Geoffreykwright

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Re: Replace DC panel circuit breaker
« Reply #6 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...
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Sundowner III
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Noah

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Re: Replace DC panel circuit breaker
« Reply #7 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.
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Geoffreykwright

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Re: Replace DC panel circuit breaker
« Reply #8 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....
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Sundowner III
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Rortega46

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Re: Replace DC panel circuit breaker
« Reply #9 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.
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Randy & Karla Ortega
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Noah

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Re: Replace DC panel circuit breaker
« Reply #10 on: August 16, 2019, 09:57:45 AM »

“D 72” - delay 72. Mystery solved! :D
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1990 hull #1014, San Diego, CA,  Fin Keel,
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