Art 210.63 requires recept's (usually GFIs) not to be installed on the load side of the disconnect. The wording here confuses me since it makes me wonder if tapping the line side is OK. Problems I see there are putting a 20 A recept on a twenty A circuit might lead to nuisance tripping of the supplying breaker, and could you even put a 20 A recept on a larger circuit? I would think you couldn't. Does this requirement point to something I'm missing, or does it really make sure you don't tap the disconnect at all?
Thanks for all info.