Jul-28-2020 07:03 AM
Jul-29-2020 01:13 AM
Jul-28-2020 10:37 PM
Jul-28-2020 05:35 PM
BB_TX wrote:pianotuna wrote:
Although RV's are classed as plug in devices and so exempt from the National Electric Code, it is best practise to follow using 80% as the maximum continuous load.
For 15 amp service that is 12 amps
For 20 amp service that is 16 amps
For a 30 amp service that is 24 amps
For a 50 amp service that is 30 amps per leg
Try as best as you can to balance the two legs. Any imbalance is sent back via the Neutral wire.
Actually 80% of 50 is 40 amps.
Jul-28-2020 05:03 PM
Bud
USAF Retired
Pace Arrow
Jul-28-2020 04:29 PM
pianotuna wrote:
Although RV's are classed as plug in devices and so exempt from the National Electric Code, it is best practise to follow using 80% as the maximum continuous load.
For 15 amp service that is 12 amps
For 20 amp service that is 16 amps
For a 30 amp service that is 24 amps
For a 50 amp service that is 30 amps per leg
Try as best as you can to balance the two legs. Any imbalance is sent back via the Neutral wire.
Jul-28-2020 04:08 PM
Jul-28-2020 12:27 PM
BB_TX wrote:Great advice. Absolutely no reason why 2 A/Cs can't be on the same leg. Take this advice and look at the big picture.theoldwizard1 wrote:
Just make sure the A/C units are on different "legs" of the 240V feed.
..........
Over simplifying. Balancing is a good idea. But before wiring in a 2nd A/C you need to look at how distribution is already done. If the existing A/C is on hot leg 1; and the water heater, microwave, converter, and that outlet used to operate the DW’s 1500 watt hair dryer are on hot leg 2, then hot leg 2 already far exceeds hot leg 1. Adding the 2nd A/C to hot leg 2 would compound the problem. In that case putting the 2nd A/C on hot leg 1 would make more sense. Or better, move some things from hot leg 2 to hot leg 1 before adding the 2nd A/C to hot leg 2.
Two A/Cs are 30 running amps or less. That is only 60% of the full 50 amps available for one leg if no other high current device is also connected to that hot leg.
Need to look at the big picture.
Jul-28-2020 11:20 AM
theoldwizard1 wrote:
Just make sure the A/C units are on different "legs" of the 240V feed.
..........
Jul-28-2020 10:03 AM
BB_TX wrote:
If you exceed the amp rating of any of these that circuit breaker will trip before damage is done.
Jul-28-2020 09:31 AM
Jul-28-2020 08:32 AM
Jul-28-2020 08:31 AM
Jul-28-2020 07:37 AM
Jul-28-2020 07:36 AM