A Beginner's Guide to Choosing the Right Electrical Wire and Cables
Whether you're rewiring a room or replacing an old outlet, choosing the right electrical wire is essential for safety and performance. This beginner’s guide will help you understand the basics—like wire types, gauges, and insulation—so you can confidently shop.
1. Know the Basics: Wire vs. Cable
Let’s start simple. Wires are single conductors, while cablesare multiple conductors bundled together in a single jacket. Most home electrical work uses cable (like NM cable, also called Romex) but there are situations where individual wires in conduit are required.
🔗 www.squarepegsupply.com/collections/electrical/wires-cables-and-cords2. Choose the Right Gauge
Wire gauge refers to the diameter of the wire and determines how much current it can safely carry. The lower the gauge number, the thicker the wire.
| Gauge | Use Case |
|---|---|
| 14 AWG | Lighting circuits (15 amps) |
| 12 AWG | Outlets, small appliances (20 amps) |
| 10 AWG | Water heaters, AC units (30 amps) |
3. Understand Color Coding
The color of a wire’s insulation isn’t just for show—it tells you what the wire does:
- Black/Red - Hot wires
- White - Neutral
- Green/Bare Copper - Ground
Tip: Never assume—double check with a voltage tester before handling wires.
Electrical Wire Color Codes - NEC Guidelines4. Safety First (and Always)
Always turn off power at the breaker and test before working. And when in doubt? Call a licensed electrician.
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5. Still Not Sure? We're Here to Help.
Choosing the right wire or cable can feel overwhelming, but it doesn't have to be. Contact our team or check out our Electrical Wire & Cable FAQs to learn more.
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