Ready to cross that electrical project off your to-do list? Understand wiring color codes so you can finish the job safely.

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Color coding is really nothing new--radio component manufacturers started doing it in the 1920s.

The Ethernet cable you use to connect your devices to your modem or router might be blue. But if it is, does that make it ...