Technicolor - Thomson POWER & CONTROL TS 870 - Manual (Page 10)

TS 870 TRANSFER SWITCH
PM062 REV 8 10/01/25 6 Thomson Technology
3.8. MOUNTING OF ENCLOSED TRANSFER SWITCHES
Model TS840, TS870 and TS880 Automatic Transfer Switches and Automatic
Transfer and Bypass Isolation Switches in "standard" enclosures are seismic
certified under AC156 building code for non-structural components.
"Standard" enclosures are all transfer switch enclosures Thomson Technology offers
in NEMA 1, NEMA 2, NEMA 3R and NEMA 4X for the above listed product. If a
customer requests a custom enclosure it would not be covered under the generic
certificate; if certification were a requirement Consult factory before ordering.
The Automatic Transfer Switches are qualified to the highest known level in North
America; based on site class D. Specifically this is a spectral acceleration of 342%.
The transfer switch must be installed per the anchoring details provided for seismic
qualification. The equipment can be mounted in alternate means and still qualify if a
qualified Civil Engineer designs the alternate method of anchoring.