Thanks, I've never seen a situation where someone was violated for the oversized gap around a box. I've never supplied oversized plates for a job and always point out to the GC or person in charge where gaps are too big. It doesn't seem like anyone else has ever heard of this rule.
Bill, The ad was in Sept/Oct2002 IAEI News-"News Source" "Cooper Wiring Devices Introduces New Mid-size Thermoplastic Wallplates" ...."designed to cover electrical installation gaps" ...."adds a full 0.375" (9.525mm) on all sides to NEMA standard-size plates, providing needed gap coverage for over cuts or other large wallboard-to-box openings" (they also describe the product line as "exciting"...I guess somebody must lead a pretty boring life)...S
I've always taken 314.21 to mean if the electrician were to perform install old work, therefore the electrician cuts the hole, is responsible, and as such citable for said hole...
i could be wrong ,inspectors might be writing up drywallers...