Interacting With Equipment is discussed on various threads. Is there a general consensus on what this means, other than what's in the
130.7(C)(9) tables? There are a couple specific cases that come to mind, these both apply to facilities with calculated IE levels and AFBs:
- Branch Circuit work in a panel with a main. After the breaker is opened, (or just before
) appropriate PPE is donned, the panel is checked dead on the load side. Now that the load side is dead, does working in the vicinity of energized line-side bus mean that this is live work? Does it matter if this work does not put the electrician within the limited or restricted approach boundary?
. - Changing fuses on a main BPS. This is on a service switchboard, with IE>40 cal/in2. The BPS would be opened, so the fuse terminals would be de-energized. I'm told that the fuses can be changed through a hinged access door, and the BPS has the line side up, so there's no hazard of dropping something onto live bus. Depending on the size of the BPS, there is anywhere from 6" to 12" from the top of the fuse terminals to the line side contacts. It may even take a fish tape to get up there, working through the fuse access door.
Both of these aren't uncommon evolutions. Are they considered live work? Interaction with equipment in a manner which may cause an arc flash? I appreciate input from the arc flash community.