I'm working with the electrical power toolkit and have a question about wiring configurations. I'm still getting up to speed with power wiring and measurement so I'm leaning pretty heavily on this toolkit. Looking at the wiring configurations enum, options include things like "3xUph + 3xI", etc. I'd like to know which configuration would match a single split-phase wiring configuration. I understand that none of these options explicitly matches a single split-phase, but are any of them mathematically equivalent when it comes to the calculations in the toolkit?