Hi Robert,
OK, I am not going to be monitoring my mains, but just one 15A circuit. My application that I will be using the CT for is very specific (one circuit) and every time I do a web search on how to use this type of CT, pretty much everything comes back to the Open Energy Monitor web site. That’s why I asked my question here.
So, to confirm, it sounds like the resistors and capacitor values are the same regardless of the voltage then. Correct? “… you might want to increase it also to suit the higher 5 V input of your Arduino.” I mentioned 33Ω as this page (Learn | OpenEnergyMonitor) mentioned that value for a 5V Arduino.
TL;DR;
My specific application is for a load sensor for a couple of my shop tools. One in particular has an induction motor that pulls a lot of current when it starts. I intend on crafting a controller that will sense when the motor starts, wait for the current to level out from it’s peak, then turn on a shop vac.
I am use to working with mains, so I already have a healthy respect for intermingling mains and low voltage. I will be using an IoT mechanical relay (not a solid state one) for switching on the shop vac.
Thanks,
Jim