Description Product Reviews 100 Pair 110in 110out Outdoor Building Entrance Protector NEMA 4 110 connector input and output Protects up to 100 lines Ideal for small PBX and interconnect installations External ground post for extending metallic frame to building ground Equipped with an internal fuse link Accommodates industry standard 5 pin protection modules Designed to exceed the requirements set forth in Underwriters Laboratories UL497 Standard 100 pair protector in a NEMA 4 outdoor housing 0 Reviews Hide Reviews Product Reviews