30 vs 50 amp electrical issue help

wapiticountry wrote:

dougrainer wrote:

ODG255 wrote:
Well, the plot thickens. I just got off of the phone with Heart land I asked them to look up my build based on VIN.

They told me that my trailer was supposed to be shipped with the 50 amp cord that I have but that there is supposed to be an “adapter” between cord and trailer. He stated that the trailer itself is 30 amp but when I told him that I want to run a second AC he said that will be no problem at all.

I asked if this is some kind of hybrid between 50 and 30 and he said yes exactly.
So everything in my trailer is 120v…. And it’s 30 amp but supposedly I can run 2 ACs?

I was hoping for clarification but this makes the whole thing even more convoluted.

I talked to my sales guy and he said that was the craziest thing he’d ever heard, I don’t know much but I have to agree with him!

Well, it appears that both Heartland AND the Dealer will lie to fix this problem. What Heartland told you is NONSENSE. YOU CANNOT RUN 2 RV AC UNITS ON 30 AMP SERVICE. PERIOD. You stated MY link is the wall connection to your trailer. That is 50 amp. Period. You need to go to the trailer and open the 120 breaker box access lid. Until YOU do this, there can be no good resolution to this thread. IF your breaker box has (2) 50 amp breakers, your RV IS 50 amp. Doug

PS, I had a Jayco electrical engineer tell me that I could NOT add a 3rd AC to a customers 39 foot Jayco with 50 amp service, because 3 AC's would draw about 42 amps and that would leave only 8 amps for the rest of the RV. I e mailed his boss and told him that person needed to be FIRED. 50 amp RV service is a TOTAL of 100 amp service.

Wow, a guy makes a mistake and you email his boss telling him the guy should be fired. How many hours would you last at your job if one mistake and you are out was the standard.
And the guy wasn’t totally incorrect. 50 amp service is not referred to as having 100 amps available. Care would have be be taken in wiring the third AC to assure it was not on the same leg as the other two units, or that leg would draw 42 amps which overloads a fifty amp circuit since continuous duty rating is 80% of the maximum rating. Load balancing would be critical and depending on how many other high amperage items (hot water heater, electric cooktop, microwave, other electric appliances etc.) it may indeed be problematic adding a third AC unit especially if there is no load management system. Actually there is nothing in the electrical codes that would prevent adding 20 AC units since the lines are protected by the 50 amp breakers. Of course such a system would be useless because you would be tripping breakers constantly, but it wouldn’t be a code violation. . It is reasonable the engineer was talking in practical, not theoretical terms, and he very well may have been correct that adding a third AC unit to that specific rig, would be a problem due to power management.

This was NOT a mistake by the standard Phone call taker at OEM call taker center. This was in response to an elevated problem due to the floor plan and design of this model 39 ft 5th wheel where the 2 AC units could not keep the rear bunkhouse area cool at all even with ducted air. The customer requested Jayco to pay for install of the 3rd AC and the customer just wanted to pay for the Parts and no Labor. Under warranty, which he was. So, Jayco went up the Chain to the Electrical Engineers. This idiot engineer, told me that ****. ANY electrical engineer at a RV maker should KNOW 120 capability and parameters. He deserved to be fired, but I doubt he was. After I elevated at Jayco, we got the authorization to get the 3rd AC done. Doug