TruePhase: Wire Color Codes
Phase lookup for electricians
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Enter a circuit number, get the phase and wire color. Free 120/240V single-phase lookup. Pro unlocks 120/208V and 277/480V three-phase lookup.
Enter a circuit number to see its common US phase color, voltage system, panel position, neutral, ground, and field-convention note.
Free lookup covers 120/240V single phase.
A one-time TruePhase Pro purchase unlocks 120/240V high-leg delta, 120/208V, and 277/480V three-phase lookup, plus saved panels, project presets, custom phase colors and numbering, panel notes, load descriptions, 2-pole and 3-pole breaker labels, print-ready panel schedules, sharing, and CSV export.
TruePhase is local-first and requires no account or sign-in.
TruePhase is a field-convention reference, not a code-compliance guarantee or engineering design. Always verify field conditions, labeling, jurisdiction requirements, project standards, and site practice before pulling wire or energizing equipment.
Ratings & Reviews
Updated App Store screenshots and listing to clarify free 120/240V single-phase lookup and TruePhase Pro features.
The developer, Nicole Nalley, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Nicole Nalley
- Size
- 2.1 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- TruePhase Pro Unlock $4.99
- Copyright
- © 2026 509 Electric LLC