About Wire & Voltage

Wire & Voltage is a reference site for electricians, contractors, solar installers and engineering students. Every calculator prints the code table it works from, so you can check the answer instead of trusting it.

Standards covered

How it is built

Static HTML, no tracking scripts, no ad frames. Calculator maths runs in your browser — nothing you type is sent anywhere. The rest of each page is plain markup that loads on a weak signal and stays readable if the script does not.