scope:

This Standard applies to corrugated electrical nonmetallic tubing (ENT) and mechanically-attached fittings, for use in accordance with C22.1, Canadian Electrical Code, Part I (CE Code), NFPA 70, National Electrical Code (NEC) and NOM-001-SEDE, Standard for Electrical Installations (Mexico). These requirements also apply to mechanically-attached fittings integral with an outlet box.

Products covered by this Standard are intended for use:

a) at a maximum continuous operating temperature of 75°C (167°F);

b) at a maximum ambient temperature of 50°C (122°F);

c) in attics provided that the ENT is installed no higher than 900 mm (3 ft) above the bottom of the ceiling joist, and the ENT material is rated minimum 60°C (140°F); and

d) underground (direct burial), in Canada only.

This Standard does not apply to fittings that are intended to be joined by solvent cement. Solventattached fittings are covered by UL 651 or CSA C22.2 No. 211.2. Solvent-attached fittings integral with an outlet or flush device box are covered by UL 514C or CAN/CSA-C22.2 No. 85.

For products intended for use in Canada, general requirements are given in CSA-C22.2 No. 0.