Installation issues : Two C-wires?

[Wynlyndd]

I am in an apartment complex. I paid Google for Handy.com to subcontract a person to install it. However, the person could not install it for these reasons:

1. Turning off all the breakers (but one) and there was still current.

2. Okay, well you should just hit that last breaker, but there was a lock on it

3. The fact there were TWO C-wires, makes me think that it is daisy-chained somehow?

4. And that breaker is locked so I don't inconvenience a neighbor.

Has anyone ever heard of this before? Is there any reason there are two C-wires that doesn't involve a neighbor? Is it possible there is a C wire to cooling and one to heating? I really want my Nest Learning Thermostat.

[Jake]

Hey Wynlyndd,

Sorry for the late response. I wanted to follow up with you, and see if you still needed any help? Let me know if you have any questions from here, as I would be happy to help out.

Best regards,

Jake

[Wynlyndd]

Yes , no movement on this issue has occurred 

[Jake]

Hey Wynlyndd,

I am sorry for the late reply. I tried to find what information I could about the issue, but I am unsure on why there would be 2 C wire connections. Do you have access to the system control board? This would provide more details on the wires. I would recommend talking to your apartment complex further on it, as they should have more details on the HVAC systems in the apartments as well. 

Best regards,

Jake

[Jake]

Hey Wynlyndd,

I want to ensure you are good to go, and everything is working properly. Please let me know if you are still having trouble, as I will be locking the thread in 24 hours due to inactivity. 

Best regards,
Jake

[Jake]

Hey Wynlyndd,

It has been a few days since the last reply, and I am going to lock the thread at this time. If you have any questions, please feel free to create a new post. 

Best regards,
Jake