Brand:
Hubbell Wiring Device-Kellems
Catalog ID:
IG2720
Locking Devices, Twist-Lock®, Isolated Ground Industrial, Flush Receptacles, 30A 3-Phase Delta 250V AC, 3-Pole 4-Wire Grounding, L15-30R, Screw Terminal, Orange
In February 1968, Hubbell patented the first isolated ground receptacle. Today - when a clean, noise-free ground is more important than ever—Hubbell is still setting the standard. Hubbell uses insulation barrier construction on many models to isolate the ground contacts from the mounting strap. The green grounding screw is connected directly to the grounding contacts. In this way, ground contacts are separated from the mounting strap and also from the conventional grounding system. The isolated ground circuit is completed by running a dedicated insulated ground wire from the system ground buss to the green grounding screw.
Isolated Ground