This is curiosity rather than a practical problem. This doorbell and push switch have been part of the house since I moved in thirty years ago, and probably date to the time the house was built (1952). The push switch is inside the porch, the white wire leading to a second (modern plastic) push switch on the front door. The are no screws on the old switch (pictured) and it doesn't twist either way, though I didn't risk turning it too hard. There is no clue where the switch is wired from.
The bell is in the kitchen. The supply wires emerge from the plaster and there is no clue what path the wiring from the push switch takes.
I tested the voltage on the bell today and it was 6 volts AC. I'm guessing the push switch is also 6V. What I am curious about is that voltage. The bell and switch must be mains powered and something, somewhere, must step the voltage down to 6V. Any ideas where that might be happening?
The bell is in the kitchen. The supply wires emerge from the plaster and there is no clue what path the wiring from the push switch takes.
I tested the voltage on the bell today and it was 6 volts AC. I'm guessing the push switch is also 6V. What I am curious about is that voltage. The bell and switch must be mains powered and something, somewhere, must step the voltage down to 6V. Any ideas where that might be happening?