Fiberglass is encouraged in cases ever dealing with electricity (even wood ladders can be a conductor sometimes).
Follow hierarchy of safety to determine steps:
1) Eliminate risk/hazard (turn off all power, lockout)
2) Substitute (higher risks with lower risks)
3) Engineer a solution (reinvent ways to control electrical energy)
4) Awareness (reveal all sources of energy)
5) Administrative controls/communication
6) PPE
