Whenever possible, always de-energize lines and equipment prior to working on or around them.
Only use tools that are marked with the official international 1000-volt rating symbol shown below, if there is any chance that the tools will make contact with an energized source.
Always inspect your tools before use.
Do NOT touch uninsulated portion of the tool or any conductive object when either might contact an energized source.
Keep tool clean, dry and free of any surface contaminants.
Destroy tool if the insulation is damaged in any way.
Do NOT use to pry or chisel.
Wear approved eye protection.