We are so used to the stuff around our house that we don’t even think how it all works. What’s the water dripping from the AC? How does a microwave work? What do the lights on a Wi-Fi router mean? Why are the electrical wires colored the way they are?

But guys, please do not try to study the wires yourself, it can be dangerous. We’ll just show them to you from the Bright Side of life if you don’t mind. (That way, you can’t accidentally make your life, um, way brighter, you know.) In each country, the wire markings are different, but we'll tell you what they mean in the US.

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