Say you took apart a type K thermocouple connector and don't remember which Wire was connected to which terminal.
Here's a simple test to figure out the polarity: The negative wire is attracted to a magnet
And in case your connectors aren't marked: The wider pin is the negative.
Here's a simple test to figure out the polarity: The negative wire is attracted to a magnet
Neodymium sphere magnet sticks to negative wire |
And in case your connectors aren't marked: The wider pin is the negative.