Electrical Fire Box 40-1

07/28/18 At 1843 hrs box 40-1 was struck for a reported commercial structure fire. Engine 40 responded with a crew of 4 Rescue with 2. Engine 40 and city tower 1 arrived at the same time. There was no conditions from side A. Engine crew and tower 1 crew investigated and found the wires in a cooler were smoking and arching. Power was secured to the unit. Box was turned over to facility. Time out was 19 mins.