Well, that was the shortest article I’ve ever written. I guess I can take the rest of the day off! Actually, it’s not quite that simple. As ESPN football analyst Lee Corso famously says, “Not so fast my friend!” Technically, my answer above is correct. You need arc flash PPE whenever you are working on live electrical equipment. However, that just leads to another, more important question. What does “working on” mean in the electrical environment?
Does it then follow that if the doors are closed and the panel covers are on, arc flash PPE is not required?
Not necessarily. Before you make that assumption, you need to make sure that the equipment is under normal operating conditions. Normal operating conditions means the following:
Equipment covers are only one part of the requirements. If the worker has any reason to believe the equipment is not properly installed, maintained, or showing signs of failure, the worker must wear PPE. In reality, the worker shouldn’t engage in electrical work on this type of equipment with or without PPE. It should be de-energized, taken out of service, and repaired.
“Working on” can fall into two categories: diagnostic and repair.
Diagnostic means troubleshooting or testing that does not involve physical alteration of the equipment. Repair involves physically altering the electrical equipment such as tightening connections, removing or replacing breakers, or any other type of modification. Both diagnostic and repair work require PPE and are considered live electrical work when the circuit is energized.
To answer the question in the title of this article, arc flash PPE is required whenever the worker is “working on” live electrical equipment and is within the arc flash boundary.