The colors adopted as local practice are shown in table below. It is better to take a good up close photo of the old thermostat and what terminals the colored wiring are terminated.
Heat Pump Thermostat
Ac wiring diagram colors. Iec dc power wiring color code. Black red and blue are used for 208 vac three phase. Basic thermostat wiring colors air conditioner systems always remember when changing a thermostat for a new thermostat to take a photo of the colors and where they go on the old thermostat or get a pencil and paper and write it down. Dc power installations can be divided into earthed or unearthed systems. Thermostat wiring and wire color chart thermostat wiring colors code. Color of wire and termination.
It is a red wire and comes from the transformer usually located in the air handler for split systems but you may find the transformer in the condensing unit. Phase 3 phase 3 wiring should be yellow. I explain what each of the letter terminals are for the voltage path how it works and also the normal color code used. Ground ground wiring should be green or green with a yellow stripe. Neutral neutral wires should be grey. Us ac power circuit wiring color codes.
I discuss how to wire the contactor and what the difference is between the. Conductors larger than 6 awg are only available in black and are color taped at the ends. In case of wiring dc power like solar or computer networks the following standard has to be followed. Phase 2 phase 2 wiring should be orange. Brown orange and yellow are used for 480 vac. R the r terminal is the power.
Phase 1 phase 1 wiring should be brown. These are the wire color coding standards that are used in the united states. All the above mentioned color code for electrical wiring is to transmit ac current from the mains.
Gallery of Ac Wiring Diagram Colors
