I am an electrician in Minnesota. I recently learned that firefighters must shut off power to a building before they hose a buring building down, due to the risk of electrocution. The same risk of electrocution exists when an automatic fire sprinkler system activates. I'm wondering if anyone has ever disconnected power to a building when the sprinkler system kicks in? It would be quite easy (but expensive) to do this by using a shunt-trip main breaker. Any thoughts?
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