Which wire is called blue and which is red? The answer is on the surface.
Red is a plus.
Blue is a negative or ground.
See also — calculation of amperes and watts.
The color of the wire is important!
Written by Pewer
I am the best electrician. I count amperes and watts quickly. https://vodoprovod.blogspot.com/2020/09/convert-amps-to-watts.html