Thanks for your quick response on this holiday weekend - you are correct both AC units are running on 240V and by default are load balanced - its been a long week. The LRA on the 4 ton unit is 105 and the LRA on the 2 ton unit is 55. The 4 ton units's compressor outside shows a min fuse rating of 29A and a max of 50A - I was surprised to see that the 30A breaker that the 4 ton unit is on has never tripped. I thought I may have needed a new 200A main or maybe the terminals on it were loose. I guess if both units fire at the same time and my pool pump, well and other appliances are on at the same time I will have a potential problem. As for the time delay relay what manufacturer/rating would you recommend? I will also look at moving some of the higher 120V circuits, but the time delay relay sounds like a real fix.