ASCO J07ATBB30400N5XC18B18G31Z 7000 SERIES BYPASS TRANSFER SW,400A 480/60,4P,AUTOMATIC OPEN TRANSITION BYPASS,3PH,4W,NEUTRAL CONF.SWITCH (B), NEMA 1 ENCLOSED. WITH ACCESSORIES: 18B/18G -2PDT CONTACTS EMERGENCY/NORMAL. 31Z - SEL.LOAD DISC.