Cut Sheet
4
Copper Cross Section:
The copper cross-sectional area determines the amount of wire
fill capacity in a poke-thru device. Unlike other wire and cable
management systems that utilize wire fill capacity, a poke-thru
device is UL tested under fire conditions to determine the maximum
amount of copper conductors that will pass through a poke-thru
device, while maintaining the fire-rating of the concrete slab. The
Multiservice Series is UL Classified to U.S. and Canadian safety
standards
(see complete marking on product) to accommodate at a
maximum the following:
Maximum Allowable Copper Cross Sectional Area:
291 Series Service Head (Power/Communication Combined).
Power compartment = .01536 sq. in. (9.91mm
2
).
Communication compartment = .05020 sq. in. (32.39mm
2
).
291 Series Service Head (Power only) =
.06656 sq. in. (42.94mm
2
).
291 Series Service Head (Communication only) =
.06526 sq. in. (42.10mm
2
).
292 Series Service Head (Power/Communication Combined).
Power compartment = .05120 sq. in. (33.03mm
2
).
Communication compartment = .05020 sq. in. (32.39mm
2
).
When using flexible metallic conduit the communication
compartment can be increased to .10040 sq. in. (64.77mm
2
).
292 Series Service Head (Power only) =
.06656 sq. in. (42.94mm
2
).
292 Series Service Head
(Communication only) = .06526 sq. in.
(42.10mm
2
). When using flexible metal
conduit the communication compartment
can be increased to .10040 sq. in. (64.77mm
2
).
Floor Coverings:
The poke-thru device is fire rated for carpet
covered floors, tile floor coverings up to 3/4"
(19.1mm) maximum thickness, and linoleum
floor coverings up to a maximum of 1/8" (3.2mm)
thickness. For other floor coverings not listed above,
consult factory.
Concrete Thickness Min/Max:
1-HOUR RATED FLOOR – 2 1/4" (57mm) min over top of deck
(or 3" (76mm) thick reinforced concrete slab) to a maximum
of 7 1/2" (191mm).
2-HOUR RATED FLOOR – 3 1/4" (83mm) min over top of deck
(or 4" (102mm) thick reinforced concrete slab) to a maximum
of 7 1/2" (191mm).
NOTE: The Multiservice Poke-Thru Series requires
a 3" (76mm) cored hole.
RC91GHBTC & RC92GHBTC Series Specifications
IMPORTANT!
The above maximum copper cross sectional
area values are for each individual power and
communication compartment.
DO NOT add values together
for any one compartment.
Size Solid
#24 .00032 sq. in. (.20645mm
2
)
#23 .00040 sq. in. (.258mm
2
)
#22 .00050 sq. in. (.32258mm
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.
1/2" Trade Size EMT Conduit
8 3/4" (222mm) Long
Tile, Terrazzo,
Linoleum, or Carpet
1 1/4" Trade Size
EMT Conduit
5 3/4" (146mm) Long
Side View of
Service Head
Concrete Slab
Communication Cables
Junction Box (Not Supplied) Can Be
Used to Make Power Connections
Scrub Water Gasket
CAUTION: These devices meet all UL scrub water
requirements, but are not suitable for wet
or damp locations, or other areas subject
to saturation with water or other liquids
such as commercial kitchens.
HOLE SIZE MINIMUM HOLE SIZE MAXIMUM
RC91GHBTC 3 1/16" (78mm) 3 1/8" (79mm)
RC92GHBTC 3 1/16" (78mm) 3 1/8" (79mm)