Originally Posted By: gbeer
Those doorbell transformers sometimes also power sprinkler systems and or thermostats.

Interesting. I would have thought a sprinkler system would need more power than that. Thermostats make sense though.

But no sprinklers in our yard, and I'm now very familiar with the wiring of my thermostat and HVAC system smile I had to create my own C wire when I installed my ZWave thermostat years ago. Yesterday I made my own ACC+ wire for my humidifier so I could hand over control to my new stat.
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Matt