The seismic capacity for the equipment class of low voltage switchgear (LVS) assemblies may be based on earthquake experience data. This equipment class consists of one or more circuit breakers and associated control relays, instrumentation, disconnect switches, and distribution buses mounted in a sheet metal enclosure. The term “low voltage switchgear” is associated with circuits of 600 volts or less, typically 440 to 480 volts in modern industrial facilities.
Office of Environment, Health, Safety & Security
October 21, 2026
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The seismic capacity for the equipment class of low voltage switchgear (LVS) assemblies may be based on earthquake experience data. This equipment class consists of one or more circuit breakers and associated control relays, instrumentation, disconnect switches, and distribution buses mounted in a sheet metal enclosure. The term “low voltage switchgear” is associated with circuits of 600 volts or less, typically 440 to 480 volts in modern industrial facilities.