Twist Lock Ground Out. Old term for non-NEMA 20A 125/250V connector. The bend on the ground blade turns out and is more of a nub. The other two blades can be either hot & neutral for 125V, or hot & hot for 250V. This connector is nearly obsolete. http://mail.altmanltg.com/publicsyne...Assortment=260 From http://www.lightfool.com/features/connectors/index.html : See also TLGI. For discussion, see http://www.controlbooth.com/forums/l...wistlocks.html.