It is better to take a good up close photo of the old thermostat and what terminals the colored wiring are terminated. Thermostat wiring and wire color chart thermostat wiring colors code.
How To Wire An Air Conditioner For Control 5 Wires Easy
Ac wiring diagram colors. I explain what each of the letter terminals are for the voltage path how it works and also the normal color code used. Neutral neutral wires should be grey. I discuss how to wire the contactor and what the difference is between the. 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. These are the wire color coding standards that are used in the united states. 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.
All the above mentioned color code for electrical wiring is to transmit ac current from the mains. The colors adopted as local practice are shown in table below. Black red and blue are used for 208 vac three phase. Ground ground wiring should be green or green with a yellow stripe. Us ac power circuit wiring color codes. R the r terminal is the power.
In case of wiring dc power like solar or computer networks the following standard has to be followed. Brown orange and yellow are used for 480 vac. Phase 2 phase 2 wiring should be orange. Phase 3 phase 3 wiring should be yellow. Iec dc power wiring color code. Color of wire and termination.
Conductors larger than 6 awg are only available in black and are color taped at the ends. Phase 1 phase 1 wiring should be brown. Dc power installations can be divided into earthed or unearthed systems.
Gallery of Ac Wiring Diagram Colors
