Marking a voltage and current carrying "White"
Curious,
Currently, we are living in a home that was built in the Late 50s or early 60s. The home is wired with copper.
A ceiling fan and light package failed today and I traced the failure to a three way dimmer switch that was outputting approximately 28 VAC. I figured the led circuit was blown so I went out and got two standard three way switches. No dimmer switches!
When I was installing them I found that neither White to the switches had be tagged with black to indicate a current carrying conductor.
Does anyone remember when the marking of white with black tape was first required by the NEC?