I've been in my studio space eleven years. The electric service in the space wasn't sufficient. I wanted new tech power run. It's about 200ft from my space to the breaker panels on my floor. The thing that made the job a $10K job was that since the building wouldn't shut off power it had to be a live splice into the main feeder cables to each floor. I got a few quotes. Some looked at it and just said no. I ended up going with a very knowledgeable Russian electrician who was friends with the building super. I asked him why it was so expensive and he said it was the live splice. He knew low noise tech power. He did a home run ground to a cold water pipe without asking. I haven't had any problems with it.