Electrical Requirements Info

Does anyone know of a solid resource for electrical as it relates to mining? I’ve had a rig running for a few months but I’m about to expand into another one, and I’m not savvy when it comes to knowing how much power it draws, how much the outlet can handle, how much the circuit can handle, etc. When do I need to invest in a dedicated 240 vs the 120 I’m using now? Any resource that has all that information (and more) would be appreciated.

Thank you!!