Power Wiring Color Codes

Reference data and engineering information about power wiring color codes for miscellaneous applications.

powerwiringcolorcodesCalculator

Overview

Engineering reference data for Power Wiring Color Codes in miscellaneous.

Key Formulas

Unit Conversion

$y = x \cdot k$

Multiply by conversion factor.

Linear Interpolation

$y = y_1 + \frac{(x - x_1)(y_2 - y_1)}{x_2 - x_1}$

Estimate between two known points.

Percentage

$p = \frac{\text{part}}{\text{whole}} \times 100\%$

Part as fraction of whole.

Variables

Symbol	Description	Unit
$x$	Input value	—
$y$	Output value	—
$k$	Conversion factor	—

Wiring Color Code Reference

10 rows

Typical AC power wiring color codes for 120/240V and 277/480V systems (North America).
Wire Function	Color	Notes / Alternatives
Phase 1 (120/240V)	Black
Phase 2 (120/240V)	Red
Phase 3 (120/240V)	Blue
Neutral (120/240V)	White	Or white with 3 black stripes
Ground (120/240V)	Green
Phase 1 (277/480V)	Brown
Phase 2 (277/480V)	Orange
Phase 3 (277/480V)	Yellow
Neutral (277/480V)	Gray	Or gray with 2 white stripes
Ground (277/480V)	Green with Yellow Stripe

Source: engineeringtoolbox.com

References

Original Source

Source: engineeringtoolbox.com