I was looking for a 120-120 isolation transformer on eBay and I kept finding 120-240/480 transformers. There are 2 secondaries on these (connect in parallel or series). It occurred to me that I could use one of these as a 120-120 by using one secondary as input and the other secondary as output. I know that this is theoretically possible, but are there practical reasons why it wouldn't work?
Also: if one of these 120-240/480 transformers is rated 500VA, that means 1 amp on the secondary, right? I.e., 1A at 480v.