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06-18-2015, 10:30 PM
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#1
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Junior Member
Join Date: Jun 2015
Posts: 5
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Quick question about 50 amp
Please don't make fun, but I just have a general question:
Obviously, when you hook up to 50 amp service you can utilize 50 amps worth of "stuff". So, if I have the following things on:
2 AC Units @ 15 amp= 30
Electric Water Heater= 10
Refrigerator= 4
Stereo= 1-2
curling iron= 3-4
Hair dryer= 8-9
For a total of 56 amps (minimum)... then something has to give. Is THIS why when my wife is getting ready in the morning, the front bedroom AC unit shuts off and the thermostat control goes blank until she turns something off and it kicks back on?
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06-18-2015, 10:46 PM
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#2
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Senior Member
Freightliner Owners Club
Join Date: Apr 2007
Posts: 432
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With then50 amp you really have two 50amp 120 volt circuits for a total of 100amps so your ok
__________________
2001 Horizon 2004 jeep GC
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06-19-2015, 04:38 AM
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#3
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Senior Member
Damon Owners Club Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 24,024
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You do not understand 50 amps
50 amps is 120/240 volt service, thus if the loads are properly balanced you can pull 50 amps on each leg or a total of 50 amps times two.. I say it that way because it is still only 50 amps.. not 100. No more than 50 amps can flow in any given wire.. (I know some folks find this confusing)
So you need to look at your breakers.. Figure out how they are arrainged
and then add up the amps on JUST ONE LEG at a time
Common arrangements are
1-2
2-1
1-2
2-1
1 2 1 2 1 2 1 2
and 1 1 1 1 2 2 2 2
__________________
Home is where I park it!
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06-19-2015, 04:47 AM
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#4
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Administrator in Memoriam
Newmar Owners Club Retired Fire Service RVer's Spartan Chassis
Join Date: May 2000
Location: Newark, DE
Posts: 25,898
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Correct. Two 50 amp circuits.
Quote:
Originally Posted by autofish
With then50 amp you really have two 50amp 120 volt circuits for a total of 100amps so your ok
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__________________
Adios, Dirk - '84 Real Lite Truck Camper, '86 Wilderness Cimarron TT, previously 4 years as a fulltimer in a '07 DSDP
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06-19-2015, 05:11 AM
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#5
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Senior Member
Join Date: Sep 2012
Posts: 8,055
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If you are having a problem you have all your loads on one leg of the feed. The nice thing about working on a MH is you can unplug it and turn off the inverter to make it safe. DO IT. If you are inside the breaker box also check the feed wire clamp screws and make sure they are tight.
FWIW - all the breaker boxes I have seen use a split bus so a double breaker taps both legs of the service. Usually all it takes to move a breaker is to remove the cover and rock the breaker out. I'd start by looking at the Airconditioner feed. If they each have a breaker and they are not next to each other move them so they are. Then you know they are on separate legs. If that does not do it swap the location of the hair dryer circuit. If that does not work it's time to get serious with a clamp on ammeter and see what is really happening.
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06-19-2015, 11:02 AM
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#6
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Senior Member
Join Date: May 2013
Posts: 248
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tell her not to curl and dry at same time not being a smart ass
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06-19-2015, 09:03 PM
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#7
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,982
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Quote:
Originally Posted by wa8yxm
You do not understand 50 amps
50 amps is 120/240 volt service, thus if the loads are properly balanced you can pull 50 amps on each leg or a total of 50 amps times two.. I say it that way because it is still only 50 amps.. not 100. No more than 50 amps can flow in any given wire.. (I know some folks find this confusing)
So you need to look at your breakers.. Figure out how they are arrainged
and then add up the amps on JUST ONE LEG at a time
Common arrangements are
1-2
2-1
1-2
2-1
1 2 1 2 1 2 1 2
and 1 1 1 1 2 2 2 2
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That is the accurate description of a 50A RV service panel.
__________________
2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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06-26-2015, 06:08 PM
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#8
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Senior Member
Join Date: Apr 2012
Posts: 573
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50 amp service = 12,000 watts ( two legs at 50 amps), 30 amp service = 3,600 watts (one leg at 30 amps).
volts x amps = watts
If the panel is balanced in a perfect world you can use 12,000 watts. Panels are never truly balanced and the world is not perfect. Hop this helps.
__________________
2015 Winnebago Tour 42QD
Cummins 8.9 ISL 450
Freightliner XCL W/IFS
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