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MrMudstud's avatar
MrMudstud
Explorer
May 13, 2014

Electrical Guru’s Help? Need to reroute rear AC separately!

I have 30 amp service with a factory Intellitec ECC EMS unit (energy management system) that will share the amps usage when it starts to max out at ~30 amps. I have a 5500 K Onan generator which has a 30 & 20 amp circuit breakers that goes to my transfer switch before it goes to my panel box.

Question: I would like to make adjustments so when the outside temperature reaches above 95 degrees, to be able to run the rear AC separately so my EMS will not share the rear AC off line. I plan to run the system the factory set up most of the time, but also have an opportunity to run the air conditioner on its separate 120 AC source from the camp service pedestal when needed.

Normally I would make a connection set up at the 20 amp source at the generator before it goes to the service panel, but in my case I don’t know how it will affect the electronics concerning my EMS. I would like a safe and correct way I could engineer this project.

Thank You in Advance for all who give suggestions with my dilemma.

4 Replies

  • I answered your post with diagrams and instructions over on IRV-2.

    With what you already have (the Intellitec ECC) it's a very simple and inexpensive wiring change.
  • You could do something that my Catalina had to power the microwave or the AC. It contained a manual transfer switch similar to a light switch to select which appliance I could run. I would (1) remove the wiring for the rear AC from the distribution panel and install this wire into a new box that has a DPDT switch as the transfer switch, (2) install a new wire from the distribution panel as one power source to the switch, and (3) install the cable that will plug into the pedestal as the second power source to the switch. In the end you will have normal power to the AC and the use of the EMS and as needed you can power the AC from the pedestal with out affecting the EMS. Give it some thought. JM2¢...
  • Add a 30a transfer switch between the rear a/c and the power center.

    Default connection will be the load center and all works as oem.
    Active connection connect to a 5-15 inlet. When powered up the transfer switch will isolate the circuit to the extension cord plugged into the 20a pedestal connector.

    Unless the control is integrated with the thermostat..... good luck on that.
    Although with actual power coming separate it may still work.

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