Ok here is the scenario. My cousin works for the Chicago water department , last night he was thawing out a water main from the main to the b-box. The house right in front of him had the power go out and smoke was coming from the riser out back. Now they use a welder set at 225 volts and run it between 18-20 amps to thaw the main. Could this be a result of a bad neutral on the poco side or even in the meter can? Sorry for long post.