I was working on the wiring in an outlet of a home from the mid 1950s. This kitchen outlet connects a switch to the garbage disposal. I connected the live wire from the circuit breaker directly to the wire leading to the appliance and then had the circuit breaker switched back on. At that instant, the wires physically moved a noticeable amount. I repeated this, and the result was the same.
What explanation can there be for the wires moving when the power at the breaker was applied? (Because of how the wires are routed, I don't think the disposal torque pulled the wires, but I could be wrong.)
While I am an electrical engineer, and can sort out connections fairly easily, this has me concerned.