Amp Up Your Skills with the 2026 Low-Voltage Cabling Practice Test – Stay Wired for Success!

When a two-conductor pair is used to carry a signal, one conductor serves as the return path for the other. In this familiar Tip–Ring pair, the Ring conductor is the return leg, so it carries the negative side of the signal relative to the other conductor. The Shield is just shielding around the cable, not part of the signal path, and Ground is a separate reference or earth connection. The other conductor of the pair (Tip) carries the opposite polarity (the positive side).