Theres Two parts to 250.146A
One is :This provision Shall not apply to Cover-Mounted Receptacles UNLESS the Box & Cover combination are Listed as providing Satisfactory Ground continuity between the Box & Receptacles.THE 2008 Analysis book doesn't deal with this as its not a change.
Part two is:A LISTED exposed work cover shall be permitted to be the grounding & bonding means when attached per # 1 & 2 as stated.
I'm saying either way a LISTED cover is required or a Pigtail is then required.
I never said UL says I just gave the number & White book as a reference which all of you should have to reference answers you"ve been giving.
Yoopersup
