If you're often working with mains-voltage things, you can use: * an isolation transformer - meaning you must now touch both conductors to get shocked instead

If you're often working with mains-voltage things, you can use: * an isolation transformer - meaning you must now touch both conductors to get shocked instead of just the live one * a foot switch to control the power supply - serves as a "dead man's switch" to cut power in case of an accident (these are not mutually-exclusive, you can combine them)