Quite a slog at a local industrial plant!
This is the reason I made the trip to Brandon, along with 30+ other employees of the company I work for! This large industrial plant had planned various power outages to different parts of the site over a 7-day period and we were there to tackle as many as we could of their many small substations each day to make sure that everything was still working as designed.
Because of their processes, safety was very strict - requiring all of us to have an emergency self-contained breathing apparatus attached to ourselves at all times and our various teams of 4-5 people were confined to the specific areas of the plant that they had been allocated for that particular day. A typical work day began with a 5 AM wake-up, left the motel for work at 5:30 AM, began the 'work' portion at 6 AM and finished between 8-16 hours later (10 PM was our latest quitting time). Repeat for the next 6 days! Breakfast was in a paper bag from the motel, a quick half-hour lunch of pizzas or something personal picked up from a local grocery store and no evening meal until returning to the motel.
Still, it was quite interesting to work with the guys on the equipment rated for various voltage levels from 115,000 to 4,160 to 600 volts as we tested transformers, breakers, fuses, cables and relays. Overall, it went very well and the guys were happy to rack up the overtime hours with no injuries or major safety violations! I did spend one day working in a room that had a 21% ammonia content in the air but that just seemed to clear one's head.