I'd be curious to know why it wouldn't. I'm sure that the last design PW ZW-R wouldn't pass, but not because of the coil wound transformer. A modern version of the PW ZW would need a lot of other things that would still have to be addressed in the design of any new transformer in order to pass. Atlas & Williams both still sell a nice coil wound transformer, although not as big.
The whole idea is moot, by the time you build a 600+ watt version of the PW ZW, add all of the nifty feature the ZW-L has and build it to pass ETL or UL standards, You'll have a much heavier product, that would be just as or more complex than the ZW-L (mainly due to integrated powermasters & circuit protection). It would probably cost more too.
Electronic Transformers are cheaper to build, and easier to integrate features into... probable also easier to get an ETL or UL certification too.
