ECN Forum Forums General Topics of the Trade General Discussion Area What was the most embarassing mistake you made and what do you do now to prevent it?

My story goes like this. I was called to a local restaurant they had just had their roof vents cleaned and in doing so the cleaning crew had pulled down some EMT. That ran to a control panel and controlled 4 different ventilators. We were instructed to get them running ASAP and then rewire the control panel. We successfully got three running and when we connected what we thought were the start leads for vent four I heard this hissing. It was the sound of the fire suppression system emptying. It was a CO2 system and by the time we made it into the kitchen past the fleeing staff the scene looked like the plumes of white smoke you see when the space shuttle takes off!

NOT A GOOD DAY!!!!!!!!!!!!!