These requirements cover portable power-distribution equipment intended to distribute power in accordance with the National Electrical Code, NFPA 70(NEC).
UL 1640-2000 history
1970UL 1640-2021 Portable power distribution units
2016UL 1640 BULLETIN-2016 UL Standard for Safety Portable Power-Distribution Equipment (COMMENTS DUE: September 19@ 2016)
2016UL 1640-2016 UL Standard for Portable Power-Distribution Equipment (Fourth Edition)
2015UL 1640 BULLETIN-2015 UL Standard for Safety Portable Power-Distribution Equipment (COMMENTS DUE: October 27@ 2015)
2014UL 1640 BULLETIN-2014 UL Standard for Safety Portable Power-Distribution Equipment (COMMENTS DUE: September 15@ 2014)
2013UL 1640 BULLETIN-2013 UL Standard for Safety Portable Power-Distribution Equipment
2012UL 1640-2012 UL Standard for Safety Portable Power-Distribution Equipment (Third Edition)
2011UL 1640 BULLETIN-2011 UL Standard for Safety Portable Power-Distribution Equipment (COMMENTS DUE: May 20@ 2011)
2010UL 1640 BULLETIN-2010 UL Standard for Safety Portable Power-Distribution Equipment (COMMENTS DUE: April 07@ 2010)
2009UL 1640 BULLETIN-2009 UL Standard for Safety for Portable Power-Distribution Equipment (COMMENTS DUE: October 14@ 2009)