Lately, I’ve been wondering why later 7002’s have vandal-resistant grilles, and some earlier 7002T’s (such as the one in U8oL0’s collection) don’t.
It just clicked. The “T” has nothing to do with the grille. It stands for “terminal”. That’s why the WST-24 has screw terminals, whereas the WS-24 has wire leads.
The 7002T must have been introduced right before Wheelock changed their grilles, while they continued to manufacture horn/strobes with wire leads for some time after that.
So, a “7002t” with leads would actually be a 7002. Makes sense, I guess.
Yep, and a 7002 with screw terminals is a 7002T. So that “ADT 3408-024”, also in U8oL0’s collection, is a very early 7002T.
The 7002T was actually introduced at the same time as the 7002. The reason the “T” stands for terminals is because Wheelock offered both pigtail and screw terminal options simultaneously for their notification appliances at that time (not just the 7000 series horn strobes but also the 40 series bells, 30 series horns, 712 series chimes, and WS series remote strobes). Around a year after the grille was redesigned, the regular 7002 was discontinued, probably because the 7002T was easier to wire up, which is why you usually see the “T” models with the newer grille style.