What Voltage Does Ethernet Use in Office and Commercial Cabling Projects?
When a business calls for ethernet cable installation services , the first questions are usually about speed: “Do we need Cat6 or Cat6A?” “Will this support our Wi‑Fi?” “Can it handle cameras?” Then someone asks a smart question that doesn’t get talked about enough: “What voltage runs through Ethernet cables?” If you’re wiring an office, warehouse, retail space, clinic, school, or any commercial building, understanding Ethernet voltage is part of building a network that’s reliable and safe—especially once you add Power over Ethernet (PoE). This guide explains the real answer (without turning it into an engineering lecture) and shares practical things experienced network cabling installers look for during structured cabling installation services. Quick answer: data-only Ethernet vs. PoE · Data-only Ethernet: Uses low-voltage differential signals designed for communication—not for powering equipment. · ...