Specification

Thomas and Betts Corporation
Product Guide Specification
ELECTRICAL NONMETALLIC TUBING (ENT)
26 05 33.03-4
REVISION 0
PART 3 – EXECUTION
3.01 INSTALLATION
A. Store products in manufacturer’s unopened package at -4°F to 158°F until installation.
B. Verify that dimensions are correct and site is in proper condition. Make sure that application of ENT
is allowed by NEC.
C. Do not proceed with installation until all unsatisfactory conditions have been corrected.
D. Verify that product is listed and is properly marked.
E. ENT shall be installed per the technical assessment prepared by fire cause analysis for use in 1-hour
and 2-hour rated construction.
F. ENT shall be installation in accordance with manufacturer’s instruction, Article 362 of the National
Electrical Code, Section 12-1500 of CEC, other applicable sections of the Code and local codes.
G. Only Carlon® ENT Blue cement recommended specifically for use with ENT and rigid nonmetallic
fittings shall be used.
H. Handling temperature; -4°F to 104°F
I. Penetration of fire rated walls, floors or ceilings shall use Classified Through-Penetration Firestop
Systems described in the current Underwriters Laboratories Fire Resistance Directory.
J. Install boxes, fittings, accessories, etc., as necessary for a complete system.
K. APPROVED USES:
a. Concrete slab – NEC Article 362 / CEC Section 12-1500
b. Walls - wood stud, masonry and metal stud – NEC Article 362 / CEC Section 12-
1500
c. Ceilings - permanent or dropped (free air only) – NEC Article 362 / CEC Section 12-
1500
d. Exposed – NEC Article 362 / CEC Section 12-1500
e. Public Assembly – NEC Section 518.4, in nonfire rated and certain five rated
structures
f. Prewired – NEC Article 362 / CEC Section 12-1500
g. Classified by UL 1479 for Through Penetration Firestop Systems in UL Guide
Category XHEZ and current UL Fire Resistance Directory
h. Three hour rated floor/ceiling assemble
i. Raised Floors – NEC Section 645.5(D)(2)
j. Exposed or concealed in building above three floors when a fire sprinkler system is
installed in accordance with NFPA 13 – NEC Section 362.10(2)
k. For use in residential attics up to 3 feet above the bottom of the ceiling joist.
l. Maximum ambient temperature 140°F (60°C)
END OF SECTION