Learn Low Voltage
Free field knowledge

Learn something useful before you buy anything.

Preview the teaching style with practical guides, short demonstrations, checklists, and calculators built around real technician decisions.

FOUNDATIONS · MODULE 06LESSON 4 OF 12
08:42
Testing a copper link without guessing
Demonstration + field checklist68%
Resource library

Start with the questions technicians ask every day.

PINOUT

T568A vs. T568B

A visual pinout guide and explanation of why end-to-end wiring consistency matters.

CALCULATOR

PoE budget

Estimate switch capacity for cameras, access points, phones, and other powered devices.

CALCULATOR

Voltage drop

Estimate conductor loss and understand the variables that change the result.

FIELD GUIDE

Good vs. failed terminations

Recognize excessive untwist, poor seating, split pairs, damaged conductors, and connector problems.

FIELD GUIDE

NO vs. NC contacts

Understand contact state, supervision, fail-safe behavior, and what a meter should show.

CHECKLIST

Service-call intake

Gather symptoms, history, scope, drawings, access, and expected behavior before changing anything.

Practical, field-focused training for the next generation of low-voltage technicians.

© 2026 Learn Low Voltage

Training does not replace licensing, codes, manufacturer instructions, or AHJ requirements.