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Get StartedLineman's Reference - URD app analytics for February 26
Lineman's Reference - URD
- Digital Apprentice LLC
- Google Play Store
- Paid
- Education
Lineman's Reference - URD is the latest app from Digital Apprentice that will teach linemen and apprentices the basics of underground distribution systems.
Learn how to:
- Isolate bad cable sections
- Hipot cable sections
- Isolate and change bad pad-mounted transformers
- Troubleshoot underground outages
- Switch Underground Distribution Loops
Primary Training Labs:
- Fault Indicators
- Cable Isolation
- Hipotting
- Transformer Isolation
Troubleshooting Labs (with optional quizzes):
- Beginner (Single Phase)
- Intermediate (Single Phase)
- Advanced (Three Phase & Single Phase)
Devices Labs - Break down and inspect the components of URD equipment:
- Single Phase Padmount
- Three Phase Padmount
- Load-Break Elbows
Lineman's Reference - URD Usage Rank
The usage rank is based on Similarweb's algorithm that calculates current installs and active users over a 28-day period.
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Lineman's Reference - URD VS. February 26, 2026