Around 9PM a box alarm was dispatched to the AMC Theater in Tilghman Square. Lehigh County Radio was reporting a fire in the electrical room with an activated fire alarm. Engine 311 arrived, securing a water supply and advanced a hand line to find an electrical fire. Crews opened up and ventilated. Tower 331 laddered the building and went to the roof with the crew from Rescue 1141 (Greenawalds). Chief 301 and Asst. Chief 303 had Command. Utility 391 responded as well.