![]() Your mechanic might not thank you for learning them, but your wallet surely will. There are certain car fixes that every man should be capable of doing himself. This doesn't mean you should be afraid to approach your car with a tool though. View our Wire & Resistor calculators in our Tool section.Whether it's the rattling that comes and goes with the moon phases, a timing belt that obeys only changes in barometric pressure, or the sudden flickering of that dreaded check engine light, certain car problems require the professional experience and honest technical knowledge only a mechanic can bring. Negative (of a positive grounded) circuit Positive (of a positive grounded) circuit Negative (of a negative grounded) circuit Positive (of a negative grounded) circuit US recommended DC power circuit wiring color codes Function However, red (+) and black (-) follows the coloring of the grounded systems in the table. Usage of the ungrounded system is discouraged for safety. He makes no recommendation for ungrounded power system colors. The recommendations in Table below are by Wiles. However, common practice (per local electrical inspectors) is for the first hot (live or active) wire to be black and the second hot to be red. Hot (active) wires may be any other colors except these. The protective ground must be bare, green or green-yellow striped. US DC power: The US National Electrical Code (for both AC and DC) mandates that the grounded neutral conductor of a power system be white or grey. IEC DC power circuit wiring color codes Function The IEC color standard for DC power cables is listed in Table below, adapted from Table 2, Cook. IEC, DC: DC power installations, for example, solar power and computer data centers, use color coding which follows the AC standards. Three-phase lines are red, black, and blue.Ĭanada AC power circuit wiring color codes Function The neutral is white, the hot (live or active) single phase wires are black, and red in the case of a second active. The protective ground is green or green with yellow stripe. US AC power circuit wiring color codes FunctionĬanada: Canadian wiring is governed by the CEC (Canadian Electric Code). Conductors larger than #6 AWG are only available in black and are color taped at the ends. The colors adopted as local practice are shown in Table below.īlack, red, and blue are used for 208 VAC three-phase brown, orange and yellow are used for 480 VAC. In principle any other colors except these may be used for the power conductors. US, AC:The US National Electrical Code only mandates white (or grey) for the neutral power conductor and bare copper, green, or green with yellow stripe for the protective ground. UK AC power circuit wiring color codes Function For adding new colored wiring to existing old colored wiring see Cook. Table below lists these along with the obsolete domestic color codes. UK, AC: The United Kingdom now follows the IEC AC wiring color codes. IEC (most of Europe) AC power circuit wiring color codes Function The protective ground wire (listed as green-yellow) is green with yellow stripe. The older color codes in the table reflect the previous style which did not account for proper phase rotation. IEC, AC: Most of Europe abides by IEC (International Electrotechnical Commission) wiring color codes for AC branch circuits. In that case, local custom dictates the “optional” wire colors. In other jurisdictions, only a few conductor colors are so codified. In some jurisdictions all wire colors are specified in legal documents. Wiring for AC and DC power distribution branch circuits are color coded for identification of individual wires.
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