Vpx3 655 Defense Solutions Curtiss Wright

Are civil defense cable trays earthquake-resistant supports

Cable tray and conduit systems have consistently performed well at conventional power and industrial facilities subjected to past strong-motion earthquakes larger than eastern U. plant safe shutdown earthquakes (1). While all cable trays support electrical cables, the importance of the specific cables they carry often dictates the level of seismic resistance required. This is so even though the systems are typically not designed for earthquake. This appendix provides the design criteria for seismic Category I cable trays and their supports. 1 Codes and Standards The design of cable trays and their supports conform to. During an earthquake, cable trays are exposed not only to gravity loads and normal service loads, but also to lateral movement, vertical acceleration, vibration, and building drift.