Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
According to NE code, the color code for the neutral is:
Red
Blue
Black
Green
Black
According to the National Electrical (NE) Code, the neutral conductor in a single-phase or three-phase system must be identified by a specific color. In older standard color coding, Black is traditionally designated for the neutral wire in AC circuits.
According to the National Electrical (NE) Code, the neutral conductor in a single-phase or three-phase system must be identified by a specific color. In older standard color coding, Black is traditionally designated for the neutral wire in AC circuits.
VLNтАЛ=3тАЛVLLтАЛтАЛ тАФ Relationship between line-to-neutral voltage and line-to-line voltage in a star connection
The color coding of wires is a safety standard used to identify conductors in an electrical installation, preventing cross-connection of phases and neutrals. While newer standards (like IEC 60446) often use Blue for neutral, the traditional NE/IS codes practiced in many regional exams historically associate Black with the Neutral wire and Red or other colors with phase conductors.
Neutral wires complete the circuit by providing a return path for current.
Correct color identification is critical for preventing electrical faults and ensuring safety during maintenance.
Older conventions frequently used Black for neutral; modern IEC standards generally prefer Blue.
Reduces the risk of improper wiring connections.
Facilitates easier troubleshooting for electrical technicians.
Global lack of uniformity (different countries use different standards).
Degradation of cable insulation can obscure original color markings over time.
Building electrification
Control panel wiring
Industrial power distribution
In current IEC standards, Neutral is identified by the color Blue.
Green or Green-with-Yellow-stripe is strictly reserved for the Earthing (Grounding) conductor to ensure safety.
Option A (Red) is typically used for Phase/Live conductors.
Option D (Green) is dedicated to the protective earth/ground wire.
C is correct тАФ According to traditional NE code standards, the neutral conductor is identified by the color Black.
Always verify which standard (IE Rules vs. IEC vs. NEC) the examiner is referencing, as color codes have evolved significantly over the last few decades.