... 3. 3 incoming and 1 outgoing Automatic Transfer Switch for Generator(ATS)1. 3 incoming + 1 outgoing :It is ... sources are also exist.No. 2 to the local area generator (AG ) , when (NN) doesn’t exist, and ... even if (HG) exists.No. 3 to the house generator (HG), when both (NN) & (AG) don’t exist.- ... auxiliary contacts ( 1 NO + 1 NC ) , to stop the generator of the house. 4 - The rated current : 30 A 5 ...