Author Topic: MNEPV 150VDC 15A Breaker as a DC circuit breaker  (Read 619 times)

schroew

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MNEPV 150VDC 15A Breaker as a DC circuit breaker
« on: April 17, 2021, 01:11:12 PM »
I wired up a Powerwerx Anderson power pole strip to my battery ( buck converter 24v->12v) but I never put a breaker in the circuit to protect against over current from a short etc. There are blade style fuses in the power strip but I was worried about the power leads from the battery bank up to the power strip.
Can I use a MNEPV 150V 15A breaker for this or is there a better product?

ClassicCrazy

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Re: MNEPV 150VDC 15A Breaker as a DC circuit breaker
« Reply #1 on: April 17, 2021, 08:55:20 PM »
A midnite breaker would work perfect for this - but you could also just put a fuse in the output line of your buck converter too.
Since you are talking about using a 15 amp breaker then the wire feeding your power pole strip should be 14 gauge or larger . If the wire is 12 gauge you could go to 20 amp breaker or fuse.
That is if I am following correctly how you have this wired - battery to buck converter to power pole strip ?
You would also need a fuse or breaker at battery to protect wire to your buck converter but wouldn't need to to fuse after that buck converter after that as long as none of the wire is below the fuse rating.

Larry
« Last Edit: April 17, 2021, 08:58:50 PM by ClassicCrazy »
system one
Classic 150 , 5s4p  Kyocera 135watt , 12s Soneil 2v 540amp lead crystal for 24v pack , Outback 3524 inverter
system two
Classic 150 ,5s 135 watt Kyocero , Jakiper 48v LiFePO4 , Outback VFX 3648 inverter
system three
Midnite KID MPPT 24 DC in to  12 volt AGM batteries

schroew

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Re: MNEPV 150VDC 15A Breaker as a DC circuit breaker
« Reply #2 on: April 19, 2021, 08:35:20 AM »
I used what I had on hand which was 10GA wire. Thanks for the reply!!