(603) 464-4600Posted June 1, 2025
When setting up a new office, upgrading your infrastructure, or expanding your building’s technology, it’s important to understand the distinction between data cabling and standard electrical wiring. These two systems serve very different functions — and if you get them wrong, your business could suffer from dropped calls, lagging internet, and downtime.
At Arcomm Communications, we specialize in designing and installing structured cabling systems for businesses across New Hampshire. Here’s what you need to know to make the right decision for your facility.
Standard wiring refers to the electrical system that powers your lights, appliances, outlets, and equipment. It’s high-voltage and designed to deliver electricity safely and efficiently.
Data cabling is the backbone of your network infrastructure. It carries low-voltage signals that allow devices like phones, computers, and servers to communicate effectively. At Arcomm, we install:
| Feature | Standard Wiring | Data Cabling |
|---|---|---|
| Purpose | Electrical power | Digital communication |
| Voltage | High voltage (120V/240V) | Low voltage |
| Cable Type | THHN, Romex | Cat5e, Cat6, Cat6A, Fiber |
| Application | Lights, outlets, appliances | Computers, VoIP, cameras |
When terminating Cat5e, Cat6, or Cat6A Ethernet cables, you’ll notice 8 individual wires (4 twisted pairs), each with a specific color. These colors help ensure consistency in how cables are wired on both ends. Following the correct standard is critical for performance and troubleshooting.
The two primary standards used in structured cabling are:
TIA/EIA-568A
TIA/EIA-568B
Both are functionally equivalent for most Ethernet networks, but 568B is more commonly used in commercial installations in the U.S.
| Pin # | 568A Color | 568B Color | Pair # |
|---|---|---|---|
| 1 | White/Green | White/Orange | Pair 3 |
| 2 | Green | Orange | Pair 3 |
| 3 | White/Orange | White/Green | Pair 2 |
| 4 | Blue | Blue | Pair 1 |
| 5 | White/Blue | White/Blue | Pair 1 |
| 6 | Orange | Green | Pair 2 |
| 7 | White/Brown | White/Brown | Pair 4 |
| 8 | Brown | Brown | Pair 4 |
Wire Pairing: The actual pairs are the same — only the color order changes.
Compatibility: You must use the same standard on both ends to make a straight-through cable.
Crossover Cables: A 568A on one end and 568B on the other makes a crossover cable, used in older setups to directly connect devices without a switch.
Always label and document which wiring standard you used.
For new structured cabling installs, we recommend TIA-568B unless there’s a specific legacy reason to use 568A.
Use a cable tester to verify pair continuity and correct order after termination.
| Use Case | 568A | 568B |
|---|---|---|
| Residential wiring (some gov. specs) | ✅ | ✅ |
| Commercial and VoIP systems | ⚠️ Sometimes | ✅ Standard |
| Legacy compatibility | ✅ | ⚠️ Sometimes |
| Crossover cable creation | ✅ | ✅ |
Structured cabling supports:
Since 1985, Arcomm Communications has been New Hampshire’s trusted name in structured cabling, VoIP, and low-voltage network solutions. Let our experience and dedication to quality power your business infrastructure.
📍 Arcomm Communications – Hillsboro, NH
📞 (603) 464-4600
📧 sales@localhost
🌐 www.arcomm1.com/structured-cabling