Source for replacement DC breakers (picture)

[Atalla]

My current fresh water pump is on a 10 amp circuit (3rd down) and the two pumps I am considering replacing it with (the direct Shurflo replacement and another option) require 15amp and 20amp respectively. Is there a good source for these breakers/switches. I see a lot of options out there but haven't found the ones that match the look of the current panel switches.

 

[stephenm27]

My current fresh water pump is on a 10 amp circuit (3rd down) and the two pumps I am considering replacing it with (the direct Shurflo replacement and another option) require 15amp and 20amp respectively. Is there a good source for these breakers/switches. I see a lot of options out there but haven't found the ones that match the look of the current panel switches.

View attachment 96545

They are Carling AD-1 breakers. Text color, switch type, orientation, nomenclature, voltage rating, and amperage are all encoded in the part number (on the side of the breaker).

I found that SR private-labeled some fields (meaning the Carling part number decoder in their product literature didn’t list the value for a particular attribute of the breaker), but was still able to identify/purchase a matching breaker (supplier on eBay).

 

[Lazy Daze]

You should be able to get those from your dealer for about $20 each. The bigger concern would be to make sure that the circuit wiring can handle the increased load - otherwise you run the risk of a fire. It "appears" that the wiring on the 10a circuit is the same gauge as the 20a circuits, but you should really double check in your wiring diagram.

 

[ocgrant]

https://www.fpmarine.com/searchresults.asp?Search=carling+ad1&Submit=

 

[stephenm27]

In case you want to decode specifically the breaker you have/need:

(this is snipped from the Carling product literature)

 

[Atalla]

You should be able to get those from your dealer for about $20 each. The bigger concern would be to make sure that the circuit wiring can handle the increased load - otherwise you run the risk of a fire. It "appears" that the wiring on the 10a circuit is the same gauge as the 20a circuits, but you should really double check in your wiring diagram.

Thanks for the caution. They are not. The 20amp circuits have 10 gauge wiring, the 15amp circuits are 12 gauge and the 10amp circuits are 14 gauge. That said, NEC specs for 14 gauge wiring is max 20 amps, so I should be okay, particularly if I use the direct replacement pump which is max 15 amp.

 

[Lazy Daze]

But... NEC is only for AC voltage, correct? This is DC voltage which is much more "picky" on wire size, especially in relation to the length (round trip) of the circuit. Look for ABYC wire specs. You'll probably come across two tables - one with a 3% drop and one with a 10% - the 10% is the one you can use.

Remember learning about the whole Tesla vs Edison electricity debate? If not, it's a fun read!

 

[Atalla]

But... NEC is only for AC voltage, correct? This is DC voltage which is much more "picky" on wire size, especially in relation to the length (round trip) of the circuit. Look for ABYC wire specs. You'll probably come across two tables - one with a 3% drop and one with a 10% - the 10% is the one you can use.

Remember learning about the whole Tesla vs Edison electricity debate? If not, it's a fun read!

Totally. Wasn't thinking. I'm going to have to spend some time following the run, but the short version is that I'm good up to 20 feet at 15 or 20 amps.

This is helpful.