Electrician in Everett
Sheathed cable can be classified according to its gauge. Underground feeder cables, for example, are all gray, while those used on buildings are usually white or black. Color coding is a recent innovation in the electrical industry, but it has not become a mandatory requirement for wiring. A wire of a certain color is the neutral wire of the circuit, which completes the circuit by carrying the current back to the electrical panel.
 
                                             
                                            