While both Extra-Heavy Duty Industrial and Hospital-Grade SmartlockPro® come in diverse versions, both styles comply with UL Standard 943 revision. Automatic self test confirms protected power is available; line terminal clamps, initially held open, expedite first time wiring; and profile facilitates installation in wallboxes. Shared features include wraparound strap, impact-resistant PBT (Polybutylene Terephthalate) face cover, and removable safety covers on feed through terminals.