I know this may not be on topic, but I was hoping someone here could shed some light on this for me. I have a 2 kVA auto transformer that I'm wanting to use to supply 110VAC inside a control panel. I've never used an autotransformer and may have goofed when I ordered it for this purpose. The transformer primary will be connected to two phases of 240VAC. I want to get 110VAC on the secondary. The question is where do I connect ground? I'm thinking that it connects to the center tap of the transformer. Is this right or do I need to throw this one back on the shelf and order an isolated transformer?
Thanks to all in advance,