R616 *Use specified wire colors. All non-SIGNAL LEVEL wiring with a constant polarity (i.e., except for outputs of motor controllers, or sensors) shall be color-coded along their entire length from the manufacturer as follows:
A. red, yellow, white, brown, or black-with-stripe on the positive (e.g., +12VDC, +5VDC) connections, and
B. black or blue for the common or negative side (-) of the connections.
Exceptions to this rule include:
C. wires that are originally attached to legal devices and any extensions to these wires using the same color as the manufacturer.
Multi-conductor (also known as multi-core) cables that do not adhere to the specified color-coding may be used, on the condition that the insulation of all exposed conductors is re-identified to comply with the rule. This can be achieved by applying colored electrical tape, colored heat shrink, or another compliant method to distinguish each conductor.