Shock Protection 277Volts

I comment on many things and try to help people out relatively quick but I'm limited on commercial work I do know some though and I would say ask your boss or a coworker if possible see what other guys are using. I have worked on 277 lighting and when I did wear gloves I used Klein leather but I know there is safety gear that is made to protect at different voltages like gloves that cover hands and arms and flash protection for your face that fits on your head so get solid advice whatever you do. Hopefully one of these other guys on here will post something for you soon. I hope this helps

I believe you should look into properly insulated electricians gloves and tools that are required for the job.