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Can you use a PQ4606G in place of the PQ3606G?
I Line II Busplugs
Forward and backward compatibility clarification
Yes. Both of these plug-in units are rated 600V, one is 3 wire and the other 4 wire.
4 wire plugs can be mounted on 3 wire busway and 3 wire plugs can be mounted on 4 wire busway.