Below are the ranges that the Voc, Vin and Iin should stay in during normal operation. There are different Vin and Iin values if you have a common or C wire in your thermostat.
Nest Thermostat
with or without C wire
- Voc: 29 to 42 V
- Vin: 29 to 42 V
- Iin: 200 to 385 mA
Nest Learning Thermostats & Nest Thermostat E
With C wire
- Voc: 29 to 42 V
- Vin: 29 to 42 V
- Iin: 100 to 200 mA
Without C wire or with power connector
- Voc: 29 to 42 V
- Vin: 29 to 42 V
- Iin: 20 to 40 mA
