Color de aislante

Circuitos IEC / NEC de CA de arriba a abajo:
L1, L2, L3 se refieren a conductores portadores de corriente no puestos a tierra. N se refiere a conductores portadores de corriente de corriente puestas a tierra. G se refiere a los conductores del sistema de puesta a tierra
Circuitos de CC de arriba a abajo:
Conductores positivos no puestas a tierra, conductores negativos no puestas a tierra, conductores puestos a tierra y condcutores del sistema de puesta a tierra.

Wires - also referred to here as conductors - can come with insulation (used for carrying current in a circuit) or without insulation (used for grounding system). If the wires have insulation, it will be possible to choose from a variety of different colors each of which is used to signify the purpose of that wire within an electrical installation. The standards vary from country to country, therefore it is necessary to research the practices in your location. Additionally, the appropriate colors will vary in each country depending upon whether the circuit is alternating current (AC), direct current (DC) and the system voltage.

IEC standard for residential AC wiring

• Phase 1 - Brown
• Phase 2 - Black
• Phase 3 - Grey
• Neutral - Blue
• Ground - Green with Yellow Stripe/without insulation

US NEC standard for residential 120/208/240 V AC wiring

• Phase 1 - Black
• Phase 2 - Red
• Phase 3 - Blue
• Neutral - White or grey
• Ground - Green/Green with yellow/without insulation

Standard for DC wiring in PV systems

• Ungrounded positive - Red
• Ungrounded negative - Black
• Grounded negative or positive - White or grey
• Ground - Green/Green with yellow/without insulation