First on the electrical wire color code is black ... Blue and yellow wires are frequently found in commercial and industrial buildings that use three-phase power (your home is single-phase ...

Photo from imagedelivery.net Electrical systems are complex and, when not managed properly, can be incredibly dangerous.

“The electricians in our program can be doing anything from residential to commercial to industrial wiring,” says Derrick Atkins, training director at Minneapolis Electrical Joint ...