Size solid – Legrand 291-H/BTC User Manual
Page 5
The RC9 Pedestal/Furniture Feed Series Poke-Thru Devices are UL Listed and Classified to U.S. and Canadian
safety standards to the following conditions:
The RC9FFS Poke-Thru Stem with the 291-H/BTC Single Service Head, the 292-H/BTC Double Service Head, or the RC9CFFTC
Double Service Head; the RC91GHBTC, RC92GHBTC, or the RC9AFFTC factory assembled poke-thru devices; the RC79APTC
Abandonment Fittings are for use with 1-, 1 1/2-, or 2-hour rated unprotected, reinforced concrete floors and 1-, 1 1/2-, or 2-hour
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 the single or double service heads or the abandonment fittings 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" [57mm] over metal deck or a minimum 3" [76mm] thick
reinforced concrete slab. Unit weight of concrete to be 110 to 155 pcf.
3. Installation – Mounted in a 3" diameter core-drilled hole in concrete per installation instructions accompanying
the fittings or abandonment fittings. For use with power circuits, data and/or maximum 50-pair size 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) Maximum number of No. 12 AWG Type THHN conductors in power compartment of poke-thru fitting.
(A1) Maximum number of No. 12 AWG Type THHN conductors plus maximum number of No. 10 AWG THHN conductors in power
compartment of poke-thru fitting.
(B) Maximum number of 22 AWG conductors in low voltage compartment of poke-thru fitting (4-pair cables have (8) conductors,
25-pair cable have (50) conductors). When conductors larger than No. 22 AWG are used, the aggregate cross-sectional area
of the copper conductors shall not exceed the aggregate cross-sectional area of the 22 AWG conductors permitted in the
low voltage compartment.
(C) 1/2", 3/4", and 1" flexible metallic conduit and fittings may be used with the 291-H/BTC or 292-H/BTC Service Head Fittings
or the factory assembled RC91GHBTC or RC92GHBTC Poke-Thru Devices.
(D) Maximum number of power conductors when flexible metallic conduit is used. Maximum number of communication
conductors to be adjusted accordingly.
NOTE: For use on carpet covered and
tile floors up to 3/4" [19.1mm] thick.
RC9FFS
RC9CFFTC
(A1) 8 + 2
(.05726 sq. in.)
[36.944mm
2
]
128
(.06400 sq. in.)
[41.293mm
2
]
291-H/BTC (pwr/communication)
3
(.01536 sq. in.)
[9.9103mm
2
]
100
(.05000 sq. in.)
[32.260mm
2
]
291-H/BTC (pwr/communication)
(D)
7
(.03584 sq. in.)
[23.124mm
2
]
60
(.03000 sq. in.)
[19.356mm
2
]
291-H/BTC (pwr only)
(D)
13
(.06656 sq. in.)
[42.946mm
2
] –
291-H/BTC (communication only)
–
130
(.06500 sq. in.)
[41.938mm
2
]
292-H/BTC (pwr/communication)
10
(.05120 sq. in.)
[33.034mm
2
]
100
(.05000 sq. in.)
[32.260mm
2
]
292-H/BTC (pwr only)
12
(.06144 sq. in.)
[39.641mm
2
] –
292-H/BTC (communication only)
–
130
(.06500 sq. in.)
[41.938mm
2
]
RC9AFFTC
–
(A1) 8 + 2
(.05726 sq. in.)
[36.944 mm
2
]
128
(.06400 sq. in.)
[41.293mm
2
]
RC91GHBTC (pwr/communication)
–
3
(.01536 sq. in.)
[9.9103mm
2
]
100
(.05000 sq. in.)
[32.260mm
2
]
RC91GHBTC (pwr/communication)
–
(D)
7
(.03584 sq. in.)
[23.124mm
2
]
60
(.03000 sq. in.)
[19.356mm
2
]
RC91GHBTC (pwr only)
–
(D)
13
(.06656 sq. in.)
[42.946mm
2
] –
RC91GHBTC (communication only)
–
–
130
(.06500 sq. in. )
[41.938mm
2
]
RC92GHBTC (pwr/communication)
–
10
(.05120 sq. in.)
[33.034mm
2
]
100
(.05000 sq. in.)
[32.260mm
2
]
RC92GHBTC (pwr only)
–
12
(.06144 sq. in.)
[39.641mm
2
] –
RC92GHBTC (communication only)
–
–
130
(.06500 sq. in.)
[41.938mm
2
]
POKE-THRU SERVICE
POWER COMMUNICATION
FITTING TYPE
FITTING TYPE (C)
CONDUCTORS (A)
CONDUCTORS (B)
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.
5