I would like to monitor total current draw at my home from my 200A electrical panel. I have L1, L2 & N (a typical three-wire single-phase distribution in an North American home). Assuming I have a perfectly balanced panel, I would assume that I need only a 100A CT on L1 and a 100A CT on L2. Am I correct?
Since we do not know if it is perfectly balanced, I assume it would be a good idea to put a 200A CT. Please let me now if this is incorrect.
Best Answer
If you have a 200 Amp service, I would take that to mean 200 amps at 240 volts - 200 amps on each hot leg.
However, you should check the rating of the main breaker in your electrical panel, and match the current transformers to that.