These requirements cover electrically tripped enclosed switches rated over 600 amperes and rated 600 amperes or less employing Class J fuses. An electrically tripped enclosed switch is one whose closing is performed manually but contact opening may be performed by a release energized by a source of voltage in addition to the normal operating means. These requirements also cover electrically tripped switches which have been investigated to determine their suitability for ground-fault protection when combined with ground-fault sensing and relaying equipment as follows: A. Switches for use with Class I ground-fault sensing and relaying equipment include those which are capable of interrupting 12 times their rated current or which have integral means to prevent disconnecting at levels of fault current exceeding the contact interrupting capability of the switch. B. Switches for use with Class II ground-fault sensing and relaying equipment are capable of interrupting 10 times their rated current and are for use in ground-fault protection systems where means to prevent disconnecting at levels of fault current exceeding the contact interrupting capability of the switch are incorporated within the ground fault sensing and relaying equipment.
UL 98-1970 history
2019UL 98 BULLETIN-2019 UL Standard for Safety Enclosed and Dead-Front Switches
1970UL 98-2019 UL Standard for Safety Enclosed and Dead-Front Switches
2018UL 98 BULLETIN-2018 UL Standard for Safety Enclosed and Dead-Front Switches (COMMENTS DUE: October 22@ 2018)
2017UL 98 BULLETIN-2017 UL Standard for Safety Enclosed and Dead-Front Switches (COMMENTS DUE: MAY 8@ 2017)
2016UL 98 CRD-2016 UL Standard for Safety Enclosed and Dead-Front Switches - Section / Paragraph Reference: 7.2.8@ 8.2@ Tables 16@ 19 and 22 Subject: Add Requirements for Class CA@ AB and G Fuses (Edition 13: February 25@ 2004)
2006UL 98 BULLETIN-2006 UL Standard for Safety Enclosed and Dead-Front Switches
2005UL 98 BULLETINS-2005 UL Standard for Safety Enclosed and Dead-Front Switches (12/02/2005 (22p); 11/23/2005 (16p))
2005UL 98 BULLETIN-2005 UL Standard for Safety Enclosed and Dead-Front Switches
2004UL 98-2004 UL Standard for Safety Enclosed and Dead-Front Switches (Thirteenth Edition; Reprint with revisions through and including October 10@ 2014)
2003UL 98 BULLETINS-2003 UL Standard for Safety Enclosed and Dead-Front Switches (10/03/2003 (16p); 04/21/2003 (90p))
2002UL 98 BULLETIN-2002 UL Standard for Safety Enclosed and Dead-Front Switches
2001UL 98 BULLETINS-2001 UL Standard for Safety Enclosed and Dead-Front Switches
2000UL 98 BULLETIN-2000 UL Standard for Safety Enclosed and Dead-Front Switches
1994UL 98-1994 UL Standard for Safety Enclosed and Dead-Front Switches (Twelfth Edition; Reprint with Revisions Through and Including October 03@ 1995)
1970UL 98-1970 UL Standard for Safety Enclosed Switches (Eighth Edition; Reprint with Revisions Through and Including April 22@ 1974; Errata 1970)