UL 1203-2006
UL Standard for Safety Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations Fourth Edition

Standard No.

UL 1203-2006

Release Date

2006

Published By

Underwriters Laboratories (UL)

Status

Be replaced 2013-11

Replace By

UL 1203 BULLETIN-2006

Latest

UL 1203-2022

Scope

These requirements cover explosion-proof and dust-ignition-proof electrical equipment for installation and use in hazardous (classified) locations, Class I, Division 1, Groups A, B, C, and D, and Class II, Division 1, Groups E, F, and G, in accordance with the National Electrical Code, NFPA 70. These requirements also cover explosion-proof electrical equipment for installation and use in Class I, Zone 1, Groups IIA, IIB, and IIC hazardous (classified) locations and dust-ignition-proof equipment for use in Zone 20, 21, and 22 locations. These requirements also cover explosion-proof electrical equipment that has been investigated for use in one or more specific gas or vapor atmospheres with or without additional Class I Groups. These requirements do not cover equipment for use in hazardous (classified) locations specifically covered in a separate standard. These requirements do not cover electrostatic devices, circuits or systems; refrigeration system controllers or the internal construction of electrical instruments such as meters. These requirements cover equipment for use under the following atmospheric conditions: a) A minimum ambient temperature of minus 50鳦 (minus 58鳩); b) An oxygen concentration not greater than 21 percent by volume; and c) A nominal barometric pressure of one atmosphere. Equipment covered by this standard shall also comply with the applicable requirements for similar equipment for use in ordinary unclassified locations.

UL 1203-2006 history

• 1970 UL 1203-2022 Explosion-proof and dust-ignition-proof electrical equipment for use in hazardous (classified) locations
• 2019 UL 1203 BULLETIN-2019 UL Standard for Safety Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations (COMMENTS DUE: MARCH 18@ 2019)
• 2018 UL 1203 CRD-2018 UL Standard for Safety Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations - Section / Paragraph Reference: 16 and 42 Subject: Non-drying thickened mineral oil-based thread sealant (Edition 5: November
• 2018 UL 1203 BULLETIN-2018 UL Standard for Safety Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations (COMMENTS DUE: SEPTEMBER 24@ 2018)
• 2017 UL 1203 BULLETIN-2017 UL Standard for Safety Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations (COMMENTS DUE: January 29@ 2018)
• 2015 UL 1203 CRD-2015 UL Standard for Safety Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations - Section / Paragraph Reference: Sections 15 and 24 (Edition 5: November 22, 2013)
• 2015 UL 1203 BULLETIN-2015 UL Standard for Safety Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations (COMMENTS DUE: JULY 27@ 2015)
• 2013 UL 1203 BULLETIN-2013 UL Standard for Safety Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations (COMMENTS DUE: SEPTEMBER 16@ 2013)
• 2013 UL 1203-2013 Explosion-proof and dust-ignition-proof electrical equipment for use in hazardous (classified) locations
• 2011 UL 1203 BULLETIN-2011 UL Standard for Safety Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations
• 2009 UL 1203 BULLETIN-2009 UL Standard for Safety Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations (COMMENTS DUE: APRIL 20@ 2009)
• 2006 UL 1203 BULLETIN-2006 UL Standard for Safety Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations
• 2006 UL 1203-2006 UL Standard for Safety Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations Fourth Edition
• 2005 UL 1203 BULLETINS-2005 UL Standard for Safety Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations (12/02/2005 (160p); 01/19/2005 (2p))
• 2004 UL 1203 BULLETINS-2004 02/05/2004 (8p)
• 2004 UL 1203 BULLETIN-2004 UL Standard for Safety Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations
• 2003 UL 1203 BULLETINS-2003 Standard for Safety for Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous
• 2002 UL 1203 BULLETIN-2002 UL Standard for Safety Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations
• 2001 UL 1203 BULLETIN-2001 UL Standard for Safety Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations
• 2000 UL 1203-2000 Explosion-proof and dust-ignition-proof electrical equipment for use in hazardous (classified) locations
• 1994 UL 1203-1994 UL Standard for Safety Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations (Second Edition; Reprint with Revisions Through and Including January 23@ 1997)