UL 1990-2005
UL Standard for Safety Nonmetallic Underground Conduit with Conductors (Third Edition)

Standard No.

UL 1990-2005

Release Date

2005

Published By

Underwriters Laboratories (UL)

Status

Be replaced 2007-02

Replace By

UL 1990 BULLETIN-2005

Latest

UL 1990-2017

Scope

1.1 These requirements cover nonmetallic underground conduit with conductors. These products consist of a factory assembly of conductors or cables inside a coilable, smooth-wall, continuous length conduit with a circular cross section. The conduit is Schedule-40, Schedule-80, EPEC-A or EPEC-B High Density Polyethylene (HDPE) in trade sizes 1/2 (16) - 4 (103). This product is intended for installation in accordance with the National Electrical Code, NFPA 70. The values in parentheses are metric trade designators of conduit. The designations Schedule-40, Schedule-80, EPEC-A and EPEC-B refer to conduit having specific outside diameters and wall thicknesses. 1.2 This product is for aboveground use where encased in not less than 2 inches (51 mm) of concrete and for underground use by direct burial or encasement in concrete.

UL 1990-2005 history

• 1970 UL 1990-2017 UL Standard for Safety Nonmetallic Underground Conduit with Conductors
• 2016 UL 1990 BULLETIN-2016 UL Standard for Safety Nonmetallic Underground Conduit with Conductors (COMMENTS DUE: MARCH 21@ 2016)
• 2013 UL 1990-2013 UL Standard for Safety Nonmetallic Underground Conduit with Conductors (Third Edition; Reprint with revisions through and including January 20@ 2017)
• 2011 UL 1990 CRD-2011 UL Standard for Safety Nonmetallic Underground Conduit with Conductors - Section / Paragraph Reference: Table 12.1 and Table 14.1 Subject: Crush load value and mandrel diameter value for 2-1/2 trade size (Edition 2: August 18@ 2005)
• 2011 UL 1990 BULLETIN-2011 UL Standard for Safety Nonmetallic Underground Conduit with Conductors (COMMENTS DUE: MAY 26@ 2011)
• 2007 UL 1990 BULLETIN-2007 UL Standard for Safety Nonmetallic Underground Conduit with Conductors (COMMENTS DUE: APRIL 30@ 2007)
• 2005 UL 1990 BULLETIN-2005 UL Standard for Safety Nonmetallic Underground Conduit with Conductors
• 2005 UL 1990-2005 UL Standard for Safety Nonmetallic Underground Conduit with Conductors (Third Edition)
• 2004 UL 1990 BULLETIN-2004 UL Standard for Safety Nonmetallic Underground Conduit with Conductors
• 1998 UL 1990-1998 UL Standard for Safety Nonmetallic Underground Conduit with Conductors (First Edition; Reprint with Revisions Through and Including September 22@ 2004)