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Phase 3 - Phase 3 wiring should be blue.

Ac wiring black white. The hot wire in a 120-volt residential AC circuit usually is coated with black insulation while the return or neutral wire is white. If you have a blue and black wire coming from your household circuit you should have two switches on your wall. Ground - Ground wiring can be green or green with a yellow stripe.

Before you start working with line voltage in your electronic circuits you need to understand a few details about how most residential and commercial buildings are wired. Red or orange can also be used as a second switched power wire in a 120-volt application. Neutral - Neutral wiring should be white.

For 120 volts AC the high side is black low side is white. The white wire is redesignated as an ungrounded conductor by using black or red or any color except gray or green electrical tape or permanent marker and connected to the other pole of the breaker and the bare ground wire is connected to the ground busbar. BLACK or RED Phase Hot or Line L WHITE Neutral N GREEN Earth Conductor Protective earth PE Three Phase AC.

If youre in a different country youll need to determine the standards for your countrys wiring. If you see a white wire marked with black or red or a piece of black or red electrical tape at its ends that means its acting as a hot wire and is no longer neutral. But the first rule is there are no rules.

Phase 2 - Phase 2 wiring should be red. By convention the white wire is neutral the black wire is hot and a green or bare wire is ground. The key is to make sure you connect the wires to the proper terminals in the plug.

But if you see three or four colors you can probably figure it out. BLACK Phase 1 or Line L1 RED Phase 2 or Line 2 L2 WHITE Phase 3 or Line 3 L3 WHITE Common Neutral N Used in Two Lines System Only GREEN Earth Conductor Protective earth PE. Hot When a white wire is augmented with a red or black color marking this often indicates that it is being used as a hot wire rather than a neutral wire.

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