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06-25-2017, 04:57 PM
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#1
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Senior Member
Join Date: Apr 2017
Location: Colorado Rockies
Posts: 152
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Power Share Switch
If found this today; what do you suppose they are using it for?
I did a web search and this is what it does:
https://www.precisioncircuitsinc.com...-share-switch/
"Power Share Switch (PSS) provides the capability to wire two appliances to a
single circuit breaker. The Primary appliance never losses power. The Secondary
appliance is allowed to run as long as the Primary is not drawing current. Power to the
Secondary appliance is turned off whenever the Primary Appliance is drawing current."
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Scott & Alta
2017 Montana 3160RL, Legacy Edition, Full Body Paint, Onan 5.5Kw
2019 Ford F450 PSD
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06-25-2017, 05:01 PM
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#2
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,237
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I've seen units with the microwave and A/C on the same breaker and a switch on the wall to choose which appliance you want to operate.
Never have investigated further so I don't know if what your talking about is mounted somewhere that can't be readily seen.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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06-25-2017, 05:08 PM
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#3
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Senior Member
Join Date: Apr 2017
Location: Colorado Rockies
Posts: 152
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The Power Share Switch is screwed to the underside of the floor, in the same compartment as the transfer switch.
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Scott & Alta
2017 Montana 3160RL, Legacy Edition, Full Body Paint, Onan 5.5Kw
2019 Ford F450 PSD
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06-26-2017, 07:08 AM
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#4
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Senior Member
Join Date: Mar 2017
Location: Central Arkansas
Posts: 235
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So it's like an automatic switch-over selector? AC runs until you fire up the microwave, at which time the switch cuts out the AC until the microwave is done?
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- Doug
2017 Bullet 243BHS
2014 Ram 3500 Laramie Crew Cab w/6.4L Hemi
~ In your darkest hour when the demons come, call on me brother and we will fight them together! ~
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06-26-2017, 07:20 AM
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#5
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Senior Member
Join Date: Apr 2017
Location: Colorado Rockies
Posts: 152
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Quote:
Originally Posted by Jeepshots
So it's like an automatic switch-over selector? AC runs until you fire up the microwave, at which time the switch cuts out the AC until the microwave is done?
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That is what it looks like. One load has priority, but if the priority load is not drawing current, the secondary load can work.
I suspect it is there because they maxed out the available breaker spaces on the load center. Nothing on the breaker labels tells me which loads are sharing a breaker; I'll see if I can figure it out.
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Scott & Alta
2017 Montana 3160RL, Legacy Edition, Full Body Paint, Onan 5.5Kw
2019 Ford F450 PSD
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06-26-2017, 07:34 AM
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#6
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Site Team
Join Date: Mar 2011
Location: Gaylord
Posts: 26,846
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From the brochure, it looks like a "single circuit transfer switch". The description indicates that the primary appliance has priority and if it is not drawing power, the secondary appliance will be able to receive power which is terminated at any time the primary appliance begins to draw power. That's pretty much the same way a transfer switch operates. The trailer (primary appliance) draws power from the park pedestal and if there is no power there, the transfer switch will change sources to allow the generator to apply power until the main source begins again, at which time the transfer switch will disconnect the generator and resume operation on the main source.
Maybe I'm missing something in what you're asking, but from what I see, the picture in your recent post is a shot of the typical 50 amp RV power center distribution/circuit breaker/DC fuse panel diagram. Where is this "priority switch that you're asking about? I don't see an indication of it on the photo....
ADDED: This picture is of the "power share device" that you linked. I don't see that device in your photo. Is it somewhere else?
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John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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06-26-2017, 07:36 AM
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#7
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Senior Member
Join Date: Mar 2014
Location: Las Cruces
Posts: 4,665
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Quote:
Originally Posted by scottz
That is what it looks like. One load has priority, but if the priority load is not drawing current, the secondary load can work.
I suspect it is there because they maxed out the available breaker spaces on the load center. Nothing on the breaker labels tells me which loads are sharing a breaker; I'll see if I can figure it out.
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My guess is that it's not necessarily the max breaker space, but it could be looked at that way, but more that they maxed out the max amperage available on the circuits. You only have 25 amps available on each so with a 15k btu AC unit on each circuit and then all the extra stuff they add with the Legacy package, there probably just wasn't enough amps available for all of it. Since your AC and microwave are the two biggest sponges for amps, it's easier to separate them with the switch than to figure out what other possible combinations could exist and devise a plan/system for them.
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Brent
2013 Alpine 3500RE
2019 Silverado 2500HD Duramax
U.S. Air Force Retired (25 yrs)
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06-26-2017, 11:38 AM
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#8
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Senior Member
Join Date: Apr 2017
Location: Colorado Rockies
Posts: 152
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Quote:
Originally Posted by JRTJH
Maybe I'm missing something in what you're asking, but from what I see, the picture in your recent post is a shot of the typical 50 amp RV power center distribution/circuit breaker/DC fuse panel diagram. Where is this "priority switch that you're asking about? I don't see an indication of it on the photo....
ADDED: This picture is of the "power share device" that you linked. I don't see that device in your photo. Is it somewhere else?
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That is a photo of my breaker panel; I included that photo to show that there is nothing on the breaker labels to indicate which devices go through the switch. The power share switch is mounted in the same compartment as the generator transfer switch; out of site unless the compartment cover is removed. I understand what it does; I just want to know which devices are connected to it.
Here is a picture of the power share device:
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Scott & Alta
2017 Montana 3160RL, Legacy Edition, Full Body Paint, Onan 5.5Kw
2019 Ford F450 PSD
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06-26-2017, 11:47 AM
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#9
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Senior Member
Join Date: Mar 2014
Location: Las Cruces
Posts: 4,665
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Most likely the AC and microwave because they are the biggest draw. By placing them so they cannot be used at the same time they pretty much solve any power problems. The microwave would be the primary so the AC will always run as the secondary unless someone tries to use the microwave. The easiest way to find out is to turn on the AC and then see if it shuts off while the microwave is in use.
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Brent
2013 Alpine 3500RE
2019 Silverado 2500HD Duramax
U.S. Air Force Retired (25 yrs)
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06-27-2017, 06:26 PM
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#10
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Senior Member
Join Date: Apr 2017
Location: Colorado Rockies
Posts: 152
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I did a little test today and found that the Power Share Switch is fed by the breaker for the bedroom air conditioner. So, one of the loads is the bedroom AC; I assume it is the primary load (never had it cut out) but don't know for sure. No idea what the other load is (not microwave, not fireplace). I can't find anything that does not work so I'm thinking it might be outlets. Guess it will become apparent one of these days.
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Scott & Alta
2017 Montana 3160RL, Legacy Edition, Full Body Paint, Onan 5.5Kw
2019 Ford F450 PSD
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06-27-2017, 07:19 PM
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#11
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Senior Member
Join Date: Mar 2014
Location: Las Cruces
Posts: 4,665
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Do you have a central vac?
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Brent
2013 Alpine 3500RE
2019 Silverado 2500HD Duramax
U.S. Air Force Retired (25 yrs)
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06-27-2017, 08:44 PM
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#12
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Senior Member
Join Date: Apr 2017
Location: Colorado Rockies
Posts: 152
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Quote:
Originally Posted by bsmith0404
Do you have a central vac?
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Yes; has it's own breaker.
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Scott & Alta
2017 Montana 3160RL, Legacy Edition, Full Body Paint, Onan 5.5Kw
2019 Ford F450 PSD
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06-28-2017, 04:13 AM
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#13
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Senior Member
Join Date: Mar 2014
Location: Las Cruces
Posts: 4,665
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Hmmmm, possibly washer and dryer.
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Brent
2013 Alpine 3500RE
2019 Silverado 2500HD Duramax
U.S. Air Force Retired (25 yrs)
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06-28-2017, 06:50 AM
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#14
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Senior Member
Join Date: Apr 2017
Location: Colorado Rockies
Posts: 152
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Quote:
Originally Posted by bsmith0404
Hmmmm, possibly washer and dryer.
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Nope, they each have their own breakers. Here is a photo of my breaker panel list showing everything that has it's own feed. The power share switch is connected to number 14; labeled AC (Bedroom) but nothing else.
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Scott & Alta
2017 Montana 3160RL, Legacy Edition, Full Body Paint, Onan 5.5Kw
2019 Ford F450 PSD
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06-28-2017, 09:13 AM
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#15
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Senior Member
Join Date: Mar 2014
Location: Las Cruces
Posts: 4,665
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Sorry, can't make it big enough on my phone to read without it getting blurry. I'm out of ides. You can always find the switch and see where the wires go.
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Brent
2013 Alpine 3500RE
2019 Silverado 2500HD Duramax
U.S. Air Force Retired (25 yrs)
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06-28-2017, 01:10 PM
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#16
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Senior Member
Join Date: Apr 2017
Location: Colorado Rockies
Posts: 152
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Quote:
Originally Posted by bsmith0404
Sorry, can't make it big enough on my phone to read without it getting blurry. I'm out of ides. You can always find the switch and see where the wires go.
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They go into the belly of the beast; way to much work to trace them. I'll figure it out one of these days; until then I'll try to limit myself to worrying about stuff that matters
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Scott & Alta
2017 Montana 3160RL, Legacy Edition, Full Body Paint, Onan 5.5Kw
2019 Ford F450 PSD
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06-28-2017, 01:12 PM
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#17
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Senior Member
Join Date: Apr 2017
Location: Colorado Rockies
Posts: 152
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Where you at in NM? Did you retire from Kirtland?
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Scott & Alta
2017 Montana 3160RL, Legacy Edition, Full Body Paint, Onan 5.5Kw
2019 Ford F450 PSD
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01-11-2023, 03:55 PM
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#18
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Junior Member
Join Date: Jan 2023
Location: Middleton
Posts: 22
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I know this is an old thread. Best thing to do is turn that breaker off and search for what else doesn't have power. More than likely it's a wall circuit. I have the exact same thing and I'm converting to the eco flow independence kit and will be eliminating the roof top AC units in place of one or maybe two mini split units. I have to divide the circuit breakers down to essentials that I want powered full time to the tune of 30 amps and the rest of the RV power to come on when I plug in. I have no way to test it because it's in my back yard not plugged in. Struggling here but I'm sure I'll figure it out. 3761fl.
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01-11-2023, 08:11 PM
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#19
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Senior Member
Join Date: Jul 2013
Location: Box Elder
Posts: 2,899
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I talked to Scott, and it turned out this switch was installed so a third A/C could be installed, and since he did not install a third A/C, the switch does nothing.
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Bob & Becky
2012 3402 Montana
2012 Chevy 2500HD D/A CC
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06-07-2023, 06:56 PM
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#20
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Junior Member
Join Date: Feb 2023
Location: Surprise
Posts: 1
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Playing around in the basement trying to get the inverter to power the outlets through my generator in line. Seen this and wondered what it was.
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David and Beate Powell (and Nugget)
2019 MT3791rd and 2017 Ford Dually
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