Q: As a contractor doing transmission maintenance, we see many different constructions of statics at the tops of transmission poles and structures. They’re grounded, and we always thought they were safe to handle with leather gloves. Now we’re hearing that statics should be grounded temporarily for worker protection. What’s the explanation for that?
A: It’s called a “static,” but don’t forget that the voltage and current flowing on it is induction-coupled alternating current that will kill you. As an industry, there are a lot of utilities that have worked statics in leather gloves and have had no issues. There are others that had no issues for decades – right up until the day someone on their crew was injured by current on a static.
It’s not actually grounding that protects the worker; it’s bonding of the grounded static. Because of the hazard level associated with this discussion, we need to post a disclaimer here: Incident Prevention magazine publishes what it believes to be the best, most accurate advice available from industry experts, but the publication is not a training venue nor is it in the consulting business. It is the employer who is solely responsible for work methods employed in the field.