Running 2 AC units on 30 amp
Hello We are picking up our new 2018 Miramar 35.3 tomorrow! We are very excited as we have been waiting since mid February when we ordered it. We are coming from a 29' travel trailer so this will ...
Forum Discussion
Hi,
This is a bit of a red herring. Most Breaker Panels in homes would not power all the circuits at once at 80 percent of their respective loads. Where I am at this moment has a 200 amp panel. There are 2 feeds of 30 amps each to out buildings, a 50 amp circuit for a water heater, a 50 amp RV plug, and a 30 amp RV plug. That already adds up to more than the 200 amp panel could power at full continuous loads.
Just because NEC doesn't say it is illegal is no reason to not respect the 80 percent of load that is recommended for continuous loads. I choose to limit my 30 amp input to 24 amps, unless I'm plugged into a 50 amp shore power supply.
NEC doesn't require code to be followed for ANY item that plugs in. Hence a hardwired autoformer breaks the code, but a plug in autoformer does not.
A far greater issue is voltage drop. I do monitor voltage and use an autoformer. At the location I am now (rural Saskatchewan) it is a long run from the power companies transformer, so even though I have access to 50 amp outlet, I still am using my Sola Basic autoformer, and I have load support active from the Magnum 3012 hybrid inverter/charger.
This is a bit of a red herring. Most Breaker Panels in homes would not power all the circuits at once at 80 percent of their respective loads. Where I am at this moment has a 200 amp panel. There are 2 feeds of 30 amps each to out buildings, a 50 amp circuit for a water heater, a 50 amp RV plug, and a 30 amp RV plug. That already adds up to more than the 200 amp panel could power at full continuous loads.
Just because NEC doesn't say it is illegal is no reason to not respect the 80 percent of load that is recommended for continuous loads. I choose to limit my 30 amp input to 24 amps, unless I'm plugged into a 50 amp shore power supply.
NEC doesn't require code to be followed for ANY item that plugs in. Hence a hardwired autoformer breaks the code, but a plug in autoformer does not.
A far greater issue is voltage drop. I do monitor voltage and use an autoformer. At the location I am now (rural Saskatchewan) it is a long run from the power companies transformer, so even though I have access to 50 amp outlet, I still am using my Sola Basic autoformer, and I have load support active from the Magnum 3012 hybrid inverter/charger.
myredracer wrote:
If you stop and think about it, there is no way that demand in a 30 amp RV can possibly be restricted to max. 80 percent (24 amps). If you added up the available load per branch circuit in the panel, it would far exceed 30 amps.
