I had to install some metering at and industrial facility where they wanted to meter just the office building off a seperate service (it had previously been fed from the plant). I think it was a 400A service.
I ran into the same thing you did at the supply houses....they don't normally deal with that stuff. The power company usually does.
I was able to contact TECO and they actually sold me CT's suitable for the installation. I also got a "test switch" (a switch assembly where you connect the voltage taps and CT taps but can disconnect them). I bought an enclosure for all this and did a little drawing on it. It worked great once I found the right CT's and what the Power company was used to using. The CT's are BIG. Bigger than I'm using to seeing on motor amps. They are much more sensitive and accurate CT's than you are prob use to.
I think for a commercial service like that, you can get the power company to do the install...but I'm not sure.
[This message has been edited by Amazingmg (edited 05-19-2005).]
