Same thing happened at Markley in Boston: https://www.universalhub.com/2018/shorting-power-supplies-spark-fire-downtown https://www.universalhub.com/2018/shorti

Same thing happened at Markley in Boston: https://www.universalhub.com/2018/shorting-power-supplies-spark-fire-downtown https://www.universalhub.com/2018/shorting-power-supplies-sp... However due to functioning fire suppression measures it didn't burn the entire building down.