transformer color codes 3 wire door chime

Speaking of ground wires, not quite understanding the grounding wire situation here, as in I’m not sure where these ground wires are coming from.Any idea as to why there are three wires total? In other words, why are there two hot, two neutral, and two (thick) ground wires? As you can see, in my existing set up, there are three in each wire nut (I'm including the wires for the existing transformer in those three). In other tutorials I’ve seen, there are only 2 wires in each of the wire nuts for the ground, neutral, and hot wires.Also, I realize that you all may not be able to answer my questions based on just the pics, but nevertheless any help would be appreciated. Apologies in advance if the questions make you shake your head.

After turning off the power (and double checking it was off with a voltage tester), unscrewing the plate that holds the existing transformer in the garage, I found that it didn’t exactly match up with what I’ve seen.īefore I start disconnecting things here and there, I thought I'd post here with a few questions I have. The chime is inside the house, the transformer is in the garage, and there’s only one doorbell (front door). After doing some research online and talking to the people at the local Ace Hardware, I decided to order the necessary parts and try to replace it myself. I’m trying to install a new doorbell that requires a new transformer.

Transformer color codes 3 wire door chime