Carlon Concrete Encasement Guidelines - Manual

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1.1 Electrical Nonmetallic Tubing (ENT), is designed to replace EMT, flexible metal conduit or other
raceway or cable systems, for installation in accordance with Article 331 of the National Electrical
Code, other applicable sections of the Code, and local codes.
1.2 Any ENT used shall meet the requirements of UL Standard UL 1653 and shall be listed by
Underwriters Laboratories, Inc., as suitable for its intended purpose.
1.3 ENT shall be recognized by a CABO National Evaluation Report for use in 1-hour and 2-hour rated
construction.
1.4 Penetration of fire rated walls, floors or ceilings shall use classified Through-Penetration Firestop
Systems described in the current Underwriters Laboratories Fire Resistance Directory.
1.5 Fittings and outlet boxes shall be designed for use with ENT and listed by Underwriters Laboratories.
All fittings, boxes and accessories shall be from one manufacturer.
1.6 Only Carlon ENT Blue cement recommended specifically for use with ENT shall be used.
1.7 Unless indicated differently on drawings, ENT systems shall be color coded: BLUE for branch and
feeder circuit wiring, YELLOW for communications, and RED for fire alarm and emergency systems.
1.8 ENT, fittings, and accessories shall be manufactured by Carlon.
Carlon new quick connect one piece fittings are approved for concrete-tight installations. For sizes larger
than 1" the use of standard Carlon
® solvent weld fittings with the proper ENT cement is recommended.
1. Cut ENT square and cleanly.
2. Insert end into fitting, making sure two (2) full
corrugations are snapped into fitting beyond
flexible tabs (2 clicks).
3. ENT should be tied to rebar at 2-3 foot intervals
to prevent flotation. Keep ENT straight. Small
deflections over a long run may accumulate
significant degrees of bend which will affect
conductor installation. Suitable materials
include wire, tie wraps, and tape.
4. When using UL solvent weld fittings for
concrete tight performance:
A. Do not use chemical primer or
cleaner.
B. Apply a light, uniform coat of
cement labeled for use with ENT
on the coupling and ENT.
C. Do not use a dauber.
D. Brush excess cement out of ENT
grooves.
E. Promptly insert ENT
into fitting while
cement is wet, until
the stop is reached,
and give a quarter
turn.
F. Do not disturb until
joint is set.
Specifications for ENT (Electrical Nonmetallic Tubing)
Concrete Encasement Guidelines
Gross Automation (877) 268-3700 · www.carlonsales.com · [email protected]