Main breaker replacement Progressive Dynamics Power Center

[cavie]

Originally Posted by iamblum

I very well could be wrong, but my understanding is a breaker or any other type of " dumb" switch does not care what side it is fed from. Amps are Amos, vets are volts. Transformers and breakers dont care where they get their voltage from. Should feed either way, but my issue is that there is a 2 pole 50 in place already so if he was to replace that with a 50 amp specialty breaker (with e 2 20s, takes up the same space) then nothing has changed other than adding the 2 20 amp breakers. What am I missing? Not trying to be rude, sarcastic or otherwise[emoji106]

You are not missing a thing. You have a full understanding of how it works.

[cavie]

Originally Posted by Punks385RLS

Wow! Thanks for all the replies and suggestions. To provide more info the new AC unit is a 15,000 BTU Coleman Mach identical to the two already on my coach. It is 110 volt. My current panel has the two main bridged 50 amp main breaker and 6 single pole breakers on each phase. I have verified that all of them feed a supplied load and I have no spare slots.


The Siemens Q22050CT is a Triplex breaker with the 50 amp bridged and the 20 amp breakers individual single pole. My understanding if that if I can use this breaker I would simply be getting two additional 20 amp breaker slots, one on each phase.


As I said in my original post my coach is equipped with a Precision Circuits Energy Management system that performs load management and load shedding as required based on loads. I'll need to wire my AC units and water heater for this system.


I'm attaching another pic of the proposed breaker and photos of my actual panel and the EMS wiring diagrams.

There is no Triplex breakers That is called a Quad breaker. They come with removable handle ties.

[cavie]

Originally Posted by Punks385RLS

Buying the twin breakers won't work. None of the breakers are full sized. They are all the smaller 1/2" mini breakers except of course the main 50 amp breaker which is full size (each main breaker is 1" wide for a total of 2" width). Hence the need for the new main breaker which gets me the main breaker and two spare 20 amp breakers in the same 2" width. I think its just a matter of verifying if the new breaker fits my panel.

If you have all twin breakers then you panel it full to capacity of the buss bars.
That is the reason of my comment about the panel may be bocked from accepting that new breaker. Installing that breaker can overload the amperage rating of the buss bar and be in violation of the NEC. If you have a rig with prewired for A/C then you should have a breaker already installed with wire hooked to it. That is per the NEC also.

[iamblum]

Sounds like cavie is on it along with twinboat. Sharp dudes. [emoji106][emoji106][emoji106]

[cavie]

Originally Posted by clifford j

I think that's pretty slick. My concern is the third A/C unit is 240 volts and any circuit breaker protection must have bridged toggles so if a fault occurs both handles will trip and kill both hot feed conductors. It seems that the dual breakers aside the 50 amp center breakers cannot be bridged.

CLIFFORD

Clifford, I missed this the first time. RV A/C are 120 volts not 240.

[1NWDad]

A third A/C comparable to the existing two will use 1-120v circuit breaker of either 15a or 20a. No reason to replace the main breaker if you install a 2 circuit 1 pole breaker in place of one of the 15 or 20a breakers. Here is an example: https://www.homedepot.com/p/Siemens-...020U/100016494

[1NWDad]

A third A/C comparable to the existing two will use 1-120v circuit breaker of either 15a or 20a. No reason to replace the main breaker if you install a 2 circuit 1 pole breaker in place of one of the 15 or 20a breakers. Here is an example: https://www.homedepot.com/p/Siemens-...020U/100016494

[twinboat]

Originally Posted by 1NWDad

A third A/C comparable to the existing two will use 1-120v circuit breaker of either 15a or 20a. No reason to replace the main breaker if you install a 2 circuit 1 pole breaker in place of one of the 15 or 20a breakers. Here is an example: https://www.homedepot.com/p/Siemens-...020U/100016494

Already discussed. There are no full size breaker spaces to install a 2 circuit type.

ALL breakers, except main breaker, are 1/2 size already.

[shootist]

Just put a 20/50/50/20 in a friends barn for a motohome plug a few weeks ago.

[pjenk51]

Originally Posted by iamblum

I very well could be wrong, but my understanding is a breaker or any other type of " dumb" switch does not care what side it is fed from. Amps are Amos, vets are volts. Transformers and breakers dont care where they get their voltage from. Should feed either way, but my issue is that there is a 2 pole 50 in place already so if he was to replace that with a 50 amp specialty breaker (with e 2 20s, takes up the same space) then nothing has changed other than adding the 2 20 amp breakers. What am I missing? Not trying to be rude, sarcastic or otherwise[emoji106]

"Any circuit breaker that does NOT have Line and Load (or + and - on DC breakers) identifying markings may be reverse fed. This includes all Square D industrial thermal-magnetic and electronic trip circuit breakers. See the compiled list below:,,,,".



https://www.schneider-electric.us/en//work/support/