The wire colour regulations in US and Canada is:
NFPA79.
BLACK Line and load circuits at incoming line voltage
RED AC control Circuits at less than Line voltage.
BLUE DC control circuits.
YELLOW Control circuits that remain live when local disconnect is off, (remote powered)
GREEN, GREEN/YELLOW Earth ground conductors.
WHITE or GRAY Current carrying grounded conductors, e.g. Neutral
WHITE with BLUE stripe, Grounded conductors carrying DC (DC common)
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.