OpenSprinkler › Forums › Hardware Questions › 24VAC transformer has 3 wires instead of 2 › Re: Re: 24VAC transformer has 3 wires instead of 2
July 1, 2014 at 11:49 pm #27422
I am using the exact same transformer and I did not connect the green-gnd wire. The importance of the ground is for safety reasons and specifically when plugging/unplugging near wet/damp areas, but it will not damage the unit. It is a fail-safe, ie, if there is an open on the neutral wire, the gnd provides a path for the current to go to gnd vs through you.