Legrand 4FFATC User Manual
Page 5
5
The Poke-Thru Devices are UL Listed and Classified to U.S. and Canadian safety standards to the following conditions:
The AV3STC and 4FFSTC15 poke-thru stem with the 4FFCTC or 4FFCTC15 service head fitting, the 4FFATC, 4FFATC15 and
4FFATC15-LJB factory assembled poke-thru device are for use with 1, 1-1/2, and 2 hr rated unprotected reinforced concrete floors
and 1, 1-1/2 or 2 hr rated floors employing unprotected steel floor units and concrete topping (D900-Series Designs), or concrete
floors with suspended ceilings. (Fire resistive designs with suspended ceilings should have provisions for accessibility in the ceiling
area below the poke-thru fittings.)
The assembled poke-thru stem and service fitting will not reduce the ratings of the floor assembly when the thickness and type of
concrete(required for the specific rating) are within the specified limits and the fittings are installed as specified:
1. – Spacing – Minimum of 2' [610mm] OC and not more than one unit per 65 sq. ft. [6 sq. m] of floor area in each span.
2. – Concrete – Minimum thickness of structural concrete topping of 2 1/4 in. [57mm] over metal deck or a minimum
3 in. thick reinforced concrete slab. Unit weight of concrete to be 110 to 155 pcf.
3. – Installation – Mounted in a 4 in. diameter core-drilled hole in concrete per installation instructions accompanying the
fittings or abandonment fittings. For use with power circuits, date and/or telephone cables as tabulated below:
The “TC” suffix letters indicate that device may be installed on tile or carpet covered concrete floors. The “LJB” suffix letters
indicate units supplied without a junction box.
(A) When different conductors are used, the aggregate cross-sectional area of the copper conductors shall not exceed the
aggregate cross-sectional area indicated in the table above.
FLOOR COVERINGS: The poke-thru device is fire rated for carpet, or wood covered concrete floors. Tile floor coverings up to 3/4"
[19.1 mm] maximum thickness, and linoleum floor coverings minimum 1/8" [3.2 mm] thickness. For other floor coverings not listed
above, consult factory.
Size Solid
#24
.00032 sq. in. [.20645mm
2
]
#22
.00050 sq. in. [.32258mm
2
]
#14
.00323 sq. in. [2.08386mm
2
]
#12
.00512 sq. in. [3.30321mm
2
]
#10
.00815 sq. in. [5.25805mm
2
]
# 8
.01296 sq. in. [8.36127mm
2
]
COPPER CROSS SECTIONAL AREA
OF COMMONLY USED CONDUCTORS
NOTE: Use above values for solid or stranded conductors.
4FFATC Series
–
16 (12AWG) (.08192 sq. in.)
144 [22AWG]
[52.861mm
2
]
(.072 sq. in.) [46.452mm
2
]
AV3STC Series
4FFCTC Series
16 (12AWG) (.08192 sq. in.)
144 [22AWG]
[52.861mm
2
]
(.072 sq. in.) [46.452mm
2
]
4FFATC15 Series
–
16 (12AWG) (.08192 sq. in.)
256 [24AWG]
[52.861mm
2
]
(.08192 sq. in.) [52.861mm
2
]
4FFSTC15 Series 4FFCTC15 Series
16 (12AWG) (.08192 sq. in.)
256 [24AWG]
[52.861mm
2
]
(.08192 sq. in.) [52.861mm
2
]
POKE-THRU
SERVICE
POWER
COMMUNICATION
FITTING TYPE
FITTING TYPE
CONDUCTORS (A)
CONDUCTORS (A)
NOTE: Not designed for use with polished concrete or terrazzo floors.