Hubbellock(R) Devices Plugs and Connector Bodies Features and Benefits Three-piece thermoplastic clamp assembly with fast-lead stainless screws provides a more consistent durable grip. Grommets provide a sealed cable entry that protects against the entry of moisture and dust HBL21414B Impact resistance in the interior of the female device comes from a strong thermoplastic material Superior wire terminations are assured with box terminals and screws with pressure pads. This design captures stray wire strands and permits more clamping pressure on the wire without damaging it. Loosening of terminations and resulting heat build-up are greatly reduced No "lazy" connections because a springloaded safety shutter automatically ejects the plug if it hasn't been properly locked into the female device. This eliminates teasing of the contacts, a major cause of contact burn-up Arcs are snuffed out, when devices are mated or unmated under load, by spring-loaded safety shutter Longer contact life is assured by supplementary springs. Other devices rely just on contacts themselves to provide proper contact pressure Enhanced safety because access to live female contacts is restricted by the spring-loaded safety shutter Positive locking is ensured by the nose of the plug being keyed into a detent in female device. This lock is independent of the contacts or a separate mechanical lock Insulated non-metallic housing enhances safety and abuse resistance HBL21415B Note: Above cut-away view and call-outs are construction elements pertaining specifically to the 30A Hubbellock series. While the Hubbellock contact interface design applies to all, there are construction elements that are different, depending on the amperage. www.hubbell-wiring.com (R) Wiring Device-Kellems B-61