The thing that actually caught my attention was that the UL label on my 4-ft Werner aluminum step ladder included some wording or warning about it being "electrically conductive", so I assumed that this wording or warning must also be part of the listing.
As you say though, this is indeed only pure speculation on my part, since unfortunately, I wasn’t able to find anything on the subject when searching the UL site.
Another question I have is if a ladder were listed, is there a requirement as a condition of the listing that the ladder to have a UL label affixed to it?
The reasons I ask is that none of the fiberglass Werner ladders I own have any UL label on them, even the metal topped step ladders, which can introduce a shock hazard to the user under the right [or wrong] circumstances. These ladders range in age from just a couple of years old to more than twenty, so this makes me wonder why the metal ladder from the same manufacture is UL listed, but none of these fiberglass ladders apparently are.
