Difference Between 14 2 And 14 3 Wire : 4 Way Switch Wiring : The 3 wire circuit works by measuring the resistance between #1 & #2 (r 1+2) and subtracting the resistance between #2 & #3 (r 2+3) which leaves just the resistance of the rtd.
Difference Between 14 2 And 14 3 Wire : 4 Way Switch Wiring : The 3 wire circuit works by measuring the resistance…