UL 174-2004 UL Standard for Safety Household Electric Storage Tank Water Heaters (Eleventh Edition; Reprint with Revisions Through and Including November 04@ 2005)
These requirements cover household electric storage tank and small capacity storage tank water heaters rated no more than 600 volts and 12 kilowatts to be installed in accordance with the National Electrical Code@ NFPA 70@ and with model plumbing and mechanical codes. These requirements do not cover immersed electrode@ side arm@ booster@ instantaneous or immersion type water heaters or water heating portions of water dispensing appliances. These requirements do not cover water heaters with a tank capacity of less than 1 gallon (3.8 L) or more than 120 gallons (454 L). Electric booster water heaters@ electric commercial storage tank water heaters@ and remote control assemblies for such heaters@ rated 600 volts or less are not covered by this standard. They are covered in the Standard for Electric Booster and Commercial Storage Tank Water Heaters@ UL 1453. Permanently installed electric water heaters@ rated 600 volts or less@ for heating the water supplied through plumbing to separately heated public or private pools or tubs@ in which swimming@ wading@ bathing@ or partial or total immersion of persons@ is to be involved are not covered by this standard. They are covered in the Standard for Electric Water Heaters for Pools and Tubs@ UL 1261. Water heaters rated 600 volts or less with a tank capacity of less than 1 gallon (3.8 liters) are not covered by this standard. They are covered under the Standard for Electric Heating Appliances@ UL 499. A water heater intended for use in a hazardous location is to be judged on the basis of its compliance with these requirements; however@ further examination and testing shall be conducted to determine whether it is acceptable for the intended use.
UL 174-2004 history
1970UL 174-2021 Household electric storage tank water heaters
2019UL 174 BULLETIN-2019 UL Standard for Safety Household Electric Storage Tank Water Heaters (COMMENTS DUE: APRIL 15@ 2019)
2018UL 174 CRD-2018 UL Standard for Safety Household Electric Storage Tank Water Heaters - Section / Paragraph Reference: New – Sections 52-56 Subject: Outdoor Use Requirements (Edition 11: April 29@ 2004)
2016UL 174 BULLETIN-2016 UL Standard for Safety Household Electric Storage Tank Water Heaters (COMMENTS DUE: DECEMBER 12@ 2016)
2012UL 174 BULLETIN-2012 UL Standard for Safety Household Electric Storage Tank Water Heaters (COMMENTS DUE: April 09@ 2012)
2008UL 174 BULLETIN-2008 UL Standard for Safety Household Electric Storage Tank Water Heaters (COMMENTS DUE: JANUARY 19@ 2009)
2005UL 174 BULLETINS-2005 UL Standard for Safety Household Electric Storage Tank Water Heaters (08/26/2005 (2p); 06/03/2005 (2p))
2004UL 174 BULLETINS-2004 UL Standard for Safety Household Electric Storage Tank Water Heaters (05/13/2004 (14p); 02/23/2004 (64p))
2004UL 174-2004 UL Standard for Safety Household Electric Storage Tank Water Heaters (Eleventh Edition; Reprint with Revisions Through and Including November 04@ 2005)
1996UL 174-1996 Household electric storage tank water heaters
1989UL 174-1989 Household electric storage tank water heaters