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Old 09-27-2015, 08:11 AM   #11
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I meter the incoming amps from the pedestal continuously using a volts and amps digital meter.

The video shows a Coleman Mach III 15K BTU air conditioner's start up draw and running draw with the water heater on Propane.
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Old 09-27-2015, 08:12 AM   #12
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This scenario does not verify the 30 amp breaker was "weak".
sure does. If it works everywhere he plugs in except "right there", then that narrows it down to "right there.
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Old 09-27-2015, 08:19 AM   #13
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I have never popped my 30 amp breaker and I run my water heater / Air Cond 15000 btu all the time with also the refer on. It could be as simple as just a weak breaker. If you can get an D/C amp probe then you could measure your amp draw at the 30 amp breaker. The only 30 amp I have popped was at the pedestal only, and that was because it was weak. Switched over to the 50 amp breaker with a pig tail and never tripped again. I attached what amps each unit should pull at FLA. Also check that the lugs are tight at the breakers.
Laura Jean I have exactly the same setup as Glenn and no issues. I will say the AC running full and Hot Water heater and fridge on the minute a hair dryer or toaster runs it pops the breaker. I have also found the breaker in the power panel in the trailer is a bit flaky, have never replaced it yet with a higher temp version.

Are you using power extensions? This could simply be voltage drop. In my case i run 115 ft and at the end running AC and Fridge i do turn the hot water off electric. As the outage drops the current goes up. Herk uses a autotransformer that boosts voltage when it is low.
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Old 09-27-2015, 08:24 AM   #14
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I run the same as Glenn does and have never popped an inside breaker with the ac on, wh on gas & elec. and refrigerator on elec. 30A pole breakers in cgs are notoriously weak while the 50A ones are not. Just put a dogbone on the 50A and go on about your business.
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Old 09-27-2015, 08:25 AM   #15
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Originally Posted by gljurczyk View Post
sure it does, never tripped the breaker in my panel only on the pole. once switched over it never popped my panel breaker. So it was not pulling to many amps because even on 50 amp breaker my main breaker never tripped. So it wasn't my unit it was the pole breaker. 50 amp outlets are used a lot less then 30 amp in a CG. I have a 30 amp at home and still run the same thing and never tripped the panel yet.
X2

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Old 09-27-2015, 08:27 AM   #16
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Originally Posted by Herk7769 View Post
I meter the incoming amps from the pedestal continuously using a volts and amps digital meter.

The video shows a Coleman Mach III 15K BTU air conditioner's start up draw and running draw with the water heater on Propane.
Herk, where do you connect to your AC system for that meter?

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Old 09-27-2015, 08:33 AM   #17
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Originally Posted by davel1971 View Post
sure does. If it works everywhere he plugs in except "right there", then that narrows it down to "right there.
True; all things being equal. (which they never are)

If the campground's voltage is low, switching to the 50 amp socket may be enough to cover for the line loss getting to the camper's main.

or

The way AC breaker's are designed, they use heat generated by the passage of current to open the contacts. When the overload is small, it takes time to generate enough heat to open (that is why spikes don't trip breakers).

The amount of time varies by the actual components in the breaker (tolerance). Just because the pedestal tripped first does not definitely mean there is no overload and the pedestal was weak; it could just mean that the tolerance to overload of the pedestal was less than the tolerance of the camper's main.

Switching to the 50 amp socket in this case could result in a small (but acceptable to the camper's breaker) overload in the power cord. The cord or plugs may very well be hot to the touch yet "everything is OK" on the 50 amp supply.

Additional resistance at the pigtail could also be the "weak link" when drawing power from the 50 amp socket.
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Old 09-27-2015, 08:35 AM   #18
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Very nice set-up you installed there Herk, Thanks for sharing. I seen the start wind drop out pretty fast. Did you install an hard start kit? It's so easy to do, just plug two wires on the capacitor.
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Old 09-27-2015, 08:41 AM   #19
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Originally Posted by nomad297 View Post
Herk, where do you connect to your AC system for that meter?

Bruce
The meter has a "donut" (coil of wire) that you slip over the hot wire located at the back of the socket you plug your camper's shore power into.

My next camper will use two of these: Digital AC 80-300V 200A LCD DISPLAY PANEL VOLT/AMP led Meter 110v 220v 120v

and the 100 amp version of this: http://voltagebooster.com/
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Old 09-27-2015, 08:43 AM   #20
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Originally Posted by gljurczyk View Post
Very nice set-up you installed there Herk, Thanks for sharing. I seen the start wind drop out pretty fast. Did you install an hard start kit? It's so easy to do, just plug two wires on the capacitor.
That was WITH the hard start kit AND the fan delay relay.


Not sure if you caught the "double bump" as the fan came on.
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