What's even more effective than wearing the correct personal protective equipment (PPE) when exposed to potential dangers? Not being exposed to those dangers in the first place. To do this, follow the "Don't Be There" rule.
If you aren't there when something goes wrong, you're not exposed to the resulting consequences. Practicing this rule does incur some cost. For example, you're going to have to invest a little time to walk around a transformer yard rather than cut through it. But this investment pays off over time.
Speaking of time, making sure when you are there that it's not any longer than necessary. That doesn't mean you should try to rush while working around dangers. Because you can do many parts of a job before or after entering the area with energized equipment or other dangers, you can reduce exposure. Examine your workflows and procedures to find opportunities along these lines. At the very least, read procedures and review drawings before entering the area and clean your tools after leaving it.