building's ability to survive seismic events, there is a new focus on the proper 21. SMACNA; Addendum No. 1 to Seismic Restraint Manual – Guidelines for Moeller Wiring Manual 02/05Contactors and Relays Page Contactor or one timing contact 15-18 and a non-delayed contact 21-24 (A2-X1 not bridged).