Avoiding Explosion Hazards, Replacing Metal-Halides and More

摘要

I recently read a paper on explosion risks in battery rooms that has me concerned. The project requires us to run a significant amount of conduit through the battery rooms. There is adequate space for our work, and we take multiple precautions to ensure that we do not come in contact with the battery system or create an arc-flash incident. One of my employees asked me if there is an explosion hazard due to an accumulation of gases in the room. The question came up because there were no gas sensors that we could see in the room. There are fans with dampers to vent air outside, but they do not run. Does the NEC require signage for this installation? Are gas sensors required? How can we determine that there is no explosion hazard?