Wiremold FlameStopper Thru-Wall and Thru-Floor Fittings

3 to 4 Hour Fire Rating Between Walls

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What's special about this fire stop?

  • Designed to stop the spread of fire between rooms, walls or floors for both new and retrofit constructions
  • Engineered to expand quickly when exposed to fire or high heat, to create a fast and efficiently seal around the cables and prevent the movement of flames and smoke
  • Plenum rated; tested to UL2043 and suitable for air-handling spaces like A/C vents
  • Click for More Features
UL

With a passive fire rating of up to four hours between walls and three hours between floors, the Wiremold FlameStopper is a perfect complement to any existing sprinkler system. Designed to provide an excellent barrier for new or existing construction, it's great for owners, tenants and inspection authorities alike.

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PART # DESCRIPTION COLOR WEIGHT PRICE
WM-SPMGL FlameStopper, Ground Lug, 5 pack N/A 0.06 lb
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FlameStopper Trade EMT Conduit Fitting
WM-FS2R-RED 2" Trade EMT Conduit Fitting, for transitioning cables through the fire rated walls/floors for both new and retrofit  Red Finish 3 lbs
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WM-FS4R-RED 4" Trade EMT Conduit Fitting, for transitioning cables through the fire rated walls/floors for both new and retrofit  Red Finish 6 lbs
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WM-FS2R-GA 2" Trade EMT Conduit Fitting, for transitioning cables through the fire rated walls/floors for both new and retrofit  Galvanized Finish 3 lbs
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WM-FS4R-GA 4" Trade EMT Conduit Fitting, for transitioning cables through the fire rated walls/floors for both new and retrofit  Galvanized Finish 6 lbs
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FlameStopper Precut to 7-5/8" Conduit
WM-FSPCC2758 2" Diameter, Trade Size EMT, fits 6" wall thickness with a 2-hour fire rating Galvanized Finish 1 lb
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WM-FSPCC4758 4" Diameter, Trade Size EMT, fits 6" wall thickness with a 2-hour fire rating Galvanized Finish 2.4 lbs
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FlameStopper Heat Shield
WM-FS2RHS To use with 2" size conduit when an existing installed conduit extends more than 1" to 6" beyond wall surface Galvanized Finish 2.08 lbs
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WM-FS4RHS To use with 4" size conduit when an existing installed conduit extends more than 1" to 6" beyond wall surface Galvanized Finish 3 lbs
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FlameStopper Retrofit Kit
WM-FS2RWP8 Kit includes; 2" diameter split conduit to enclose existing cables and 8x8 wall plate, for use with WM-FS2R series firestop Galvanized Finish 6.2 lbs
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WM-FS4RWP12 Kit includes; 4" diameter split conduit to enclose existing cables and 12x12 wall plate, for use with WM-FS4R series firestop Galvanized Finish 12.8 lbs
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  • Mechanical doors can be closed to provide a barrier between rooms prior to cabling installation
  • Adding or subtracting cables is easy: just adjust the doors to accommodate more or fewer cables - no need to adjust the intumescent material
  • Fittings are shipped in pairs, and installed on both sides of the wall or floor to accommodate any thickness
  • 4-hour fire and temperature rating ensures that the FlameStopper will maintain the integrity of fire rated walls or floors
  • Retrofit kits available; no need to plug existing construction with caulks, sealants or putties
  • Kits consist of:
    • Split conduit for installations where no conduit is installed
    • Large firestop wall plate for irregular hole penetrations
    • Heat shield for existing extended conduit lengths
  • ASTM E814, UL1479, UL2043

 

Flame: The F Rating (F and FH in Canada) is expressed in hours. This number indicates the specific length of time that a barrier can
withstand fire before being consumed or before permitting the passage of flame through the opening.
Temperature: The T Rating (FT and FTH in Canada) is expressed in hours. This number indicates the length of time that the temperature on the non-fire side of the penetration does not exceed 325 degrees F above the ambient temperature.
Air Leakage: The L Rating is expressed in CFM. This number indicates the amount of air (or cold smoke) that can leak through a penetration.
THROUGH-WALL RATINGS FOR FS2R & FS4R SERIES (When used alone for new construction or existing construction with heat shield.)
UL RATINGS (US Ratings) MAX. RATING UL RATINGS (Canadian Ratings) MAX. RATING
F Rating w/ & w/o cables 4 Hours F & FH Rating w/ & w/o cables 4 Hours
T Rating w/coax cable 4 Hours FT & FTH Rating w/coax cable 4 Hours
T Rating w/fiber optic cable 4 Hours FT & FTH Rating w/fiber optic cable 4 Hours
T Rating w/Max. 1" fiber optic rcwy. w/fiber optic fill 4 Hours FT & FTH Rating w/Max. 1" fiber optic rcwy. w/fiber optic fill 4 Hours
T Rating w/Max. 4-pair cable (22 ga & smaller) 3 Hours FT & FTH Rating w/Max. 4-pair cable (22 ga & smaller) 3 Hours
T Rating w/Max. 4 conductor (2AWG & smaller) 1 Hours FT & FTH Rating w/Max. 4 conductor (2AWG & smaller) 1 Hours
T Rating w/Max. 100-pair cable (24 ga & smaller) 1 Hours FT & FTH Rating w/Max. 100-pair cable (24 ga & smaller) 1 Hours
T Rating w/Max. 400-pair cable (24 ga & smaller) 45 Minutes FT & FTH Rating w/Max. 400-pair cable (24 ga & smaller) 45 Minutes
T Rating w/MC cable (8 wire max. 12 ga & smaller) 15 Minutes FT & FTH Rating w/MC cable (8 wire max. 12 ga & smaller) 15 Minutes
L Rating at ambient w/o cables (doors closed) 2.6 cfm L Rating at ambient w/o cables (doors closed) 2.6 cfm
L Rating at 400°F w/o cables (doors closed) 1.9 cfm L Rating at 400°F w/o cables (doors closed) 1.9 cfm
L Rating at ambient with cables 2.8 cfm L Rating at ambient with cables 2.8 cfm
L Rating at 400°F with cables 1.3 cfm L Rating at 400°F with cables 1.3 cfm
Suitable for use in air handling spaces (plenums) Yes Suitable for use in air handling spaces (plenums) Yes
THROUGH-WALL RATINGS FOR FS2R & FS4R SERIES (When used with wall plate for retrofit applications.)
UL RATINGS (US Ratings) MAX. RATING UL RATINGS (US Ratings) MAX. RATING
F Rating w/ & w/o cables 2 Hours F & FH Rating w/ & w/o cables 2 Hours
T Rating w/Max. 4-pair cable (22 ga & smaller) 1.25 Hours FT & FTH Rating w/Max. 4-pair cable (22 ga & smaller) 1.25 Hours
T Rating w/coax cable 1 Hour  FT & FTH Rating w/coax cable 1 Hour 
T Rating w/fiber optic cable 1.25 Hours FT & FTH Rating w/fiber optic cable 1.25 Hours
T Rating w/Max. 1" fiber optic rcwy. w/fiber optic fill 1.25 Hours FT & FTH Rating w/Max. 1" fiber optic rcwy. w/fiber optic fill 1.25 Hours
T Rating w/MC cable (8 wire max. 12 ga & smaller) 15 Minutes FT & FTH Rating w/MC cable (8 wire max. 12 ga & smaller) 15 Minutes
L Rating at ambient w/o cables (doors closed) 1.7 cfm L Rating at ambient w/o cables (doors closed) 1.7 cfm
L Rating at 400°F w/o cables (doors closed) 1.8 cfm L Rating at 400°F w/o cables (doors closed) 1.8 cfm
L Rating at ambient with cables 3.3 cfm L Rating at ambient with cables 3.3 cfm
L Rating at 400°F with cables 2.0 cfm L Rating at 400°F with cables 2.0 cfm
Suitable for use in air handling spaces (plenums) Yes Suitable for use in air handling spaces (plenums) Yes

 

THROUGH-FLOOR RATINGS FOR FS2R & FS4R SERIES (When used alone.)
UL RATINGS (US Ratings) MAX. RATING UL RATINGS (Canadian Ratings) MAX. RATING
F Rating w/ & w/o cables 3 Hours F Rating w/ & w/o cables 3 Hours
T Rating w/o cables 3 Hours T Rating w/o cables 3 Hours
T Rating w/coax cable 3 Hours T Rating w/coax cable 3 Hours
T Rating w/fiber optic cable 3 Hours T Rating w/fiber optic cable 3 Hours
T Rating w/Max. 4-pair cables (22 ga. or smaller) 3 Hours T Rating w/Max. 4-pair cables (22 ga. or smaller) 3 Hours
T Rating w/Max. 4-conductor (2 ga. or smaller) 45 Minutes T Rating w/Max. 4-conductor (2 ga. or smaller) 45 Minutes
T Rating w/Max. 100-pair cables (24 ga. or smaller) 1 Hour T Rating w/Max. 100-pair cables (24 ga. or smaller) 1 Hour
T Rating w/Max. 400-pair cables (24 ga. or smaller) 45 Minutes T Rating w/Max. 400-pair cables (24 ga. or smaller) 45 Minutes
T Rating w/MC cable (8 wire Max. 12 ga. or smaller) 15 Minutes T Rating w/MC cable (8 wire Max. 12 ga. or smaller) 15 Minutes
L Rating at ambient w/o cables (doors closed) 2.6 cfm L Rating at ambient w/o cables (doors closed) 2.6 cfm
L Rating at 400°F w/o cables (doors closed) 1.9 cfm L Rating at 400°F w/o cables (doors closed) 1.9 cfm
L Rating at ambient with cables 2.8 cfm L Rating at ambient with cables 2.8 cfm
L Rating at 400°F with cables 1.3 cfm L Rating at 400°F with cables 1.3 cfm
Suitable for use in air handling spaces (plenums) Yes Suitable for use in air handling spaces (plenums) Yes
NOTE: Minimum 4 1/2" [114mm] thick reinforced lightweight or normal weight (100-150 pcf) [1600-2400 kg/m3] concrete floor. Maximum diameter of opening is 4 1/2" [114mm].

 

Wire Fill Capacity Charts for FlameStopper

Data/Communication Wire
  Cable/Wire Size O.D. FS2 (Fill) FS4 (Fill)
inches (mm) 40% 60% 40% 60%
Unshielded Twisted Pair 4-pair, 24 AWG Cat 3 UTP 0.19 [4.8] 47 71 208 312
4-pair, 24 AWG Cat. 5e UTP 0.21 [5.3] 38 58 170 255
4-pair, 24 AWG Cat. 6 UTP 0.25 [6.3] 20 30 68 100
Telephone 2-pair, 24 AWG 0.14 [3.6] 87 130 383 574
25-pair, 24 AWG 0.41 [10.4] 10 15 44 67
50-pair, 24 AWG 0.58 [14.7] 5 7 22 33
100-pair, 24 AWG 0.7 [17.8] 3 5 15 22
400-pair, 24 AWG 1.47 [37.3] 0 1 3 5
Coaxial RG58/U 0.195 [5.0] 45 67 197 296
RG59/U 0.242 [6.1] 29 43 128 192
RG62/U 0.242 [6.1] 29 43 128 192
RG6/U 0.27 [6.9] 21 32 95 140
Fiber Optic 2 Count 0.18 [4.6] 52 79 231 347
6 Count 0.21 [5.3] 38 58 170 255
24 Count 0.4 [10.2] 10 16 46 70
48 Count 0.45 [11.4] 8 12 37 55
96 Count 0.56 [14.2] 5 8 23 35
 
Power Wiring
Cable Type O.D. FS2 (Fill) FS4 (Fill)
inches (mm) 40% 60% 40% 60%
Max 4 cond. No. 2 AWG (or smaller) copper conductor cable with XLPE/PVX insulation and PVC jacket 0.375 [9.5] 12 18 53 80
0.500 [12.7] 6 10 30 45
0.625 [15.9] 4 6 19 28
0.750 [19.1] 3 4 13 20
0.875 [22.2] 2 3 9 14
1.000 [25.4] 1 2 7 11
1.125 [28.6] 1 2 5 8
Max 8 cond. No.12 AWG MC (Metal Clad) Cable 0.375 [9.5] 12 18 53 80
0.500 [12.7] 6 10 30 45
0.625 [15.9] 4 6 19 28
0.655 [16.6] 3 5 17 26

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