Many seismic cabinets are available with NEMA -rated enclosure options, including NEMA 3R, 4, and 4X, and 12, allowing for use in indoor or outdoor applications where protection from water, dust, or corrosion is required. Belden's Server and Switch Cabinets are certified to Seismic Zone 4 requirements, passing vibration and shock testing per GR-63-CORE Network Equipment Building System (NEBS) requirements with no structural damage in a certified lab. Tested to NEBS Zone 4 via Telecordia GR-63-CORE This includes earthquake zones, transportation (railway Welded 12 gauge steel enclosures power plants and airports. In addition, power plants, railroads, airports and other installations use rack-mounted electrical and electronic equipment that is subjected to vibration and other motion that can over-stress. NEBS-Telcordia GR-63-CORE Zone 4: Tested with 1000 lb. 6 kg) of equipment installed and 100 lb. Seismic Cabinets protect LAN and WAN network equipment, servers and phone/voice mail equipment during Zone 4 seismic activity, and are also ideal for. All rights including translation into other languages, reserved under the Universal Copyright Convention, the Berne Convention for the Protection of Literary and Artistic Works, and the International and Pan American Copyright Conventions. Alternative Materials, Design, and Methods of. These designs ensure the cabinet can withstand specified load requirements and seismic forces, including installations in Zone 4 seismic regions. Side panels and doors are constructed to remain secure during seismic events while maintaining a controlled internal environment for sensitive.