Description

  • Low smoke, zero halogen raceway
  • Low toxicity generation characteristics
  • Hot dipped zinc galvanized low carbon steel core
  • Excellent temperature ratings
  • Black thermoplastic polyurethane jacket
  • UL copper bonding strip 3/8″ – 11⁄4″ for grounding
  • Sunlight resistant
  • Flame retardant TPU jacket

Applications

  • Wherever limiting toxic material of combustion is needed
  • 600 volt and lower circuits
  • Direct burial and concrete embedment
  • Bond wire for grounding in sizes 3/8″ – 11⁄4″ NEC® 250.118(6)
  • Hazardous locations per NEC® 501

Construction

The LIQUID-TUFF™ LSZH Liquidtight Flexible Metal Conduit shall be formed from zinc coated galvanized low carbon steel strip having a uniform width and thickness. There shall be a continuous bonding strip built into the conduit core for the 3/8 through 11⁄4 trade sizes. The construction shall be in accordance with the UL 360 Standard. The Low Smoke Zero Halogen designation shall be based upon testing to ASTM® 162 – Flame Spread Index, ASTM® E662 – Smoke Density Generation and Bombardier SMP-800C – Toxic Gas Generation. The finished LIQUID-TUFF™ LSZH Liquidtight Flexible Metal Conduit dimensions shall be in accordance with Table 5.1 of UL 360

Jacket – TPU

A rugged low-smoke, moisture, oil, sunlight resistant and flame retardant thermoplastic polyurethane jacket shall be applied directly over the flexible metal conduit. The physical properties of the jacket material shall comply with the UL 360 Standard. The Low Smoke Zero Halogen jacket shall be tested to and comply with ASTM® 162 – Flame Spread Index, ASTM® E662 – Smoke Density Generation and Bombardier SMP-800C – Toxic Gas Generation. The test results are summarized in Table 1. Underwriters Laboratories Inc. (UL) does not List any manufacturers jacket compound as being low smoke zero halogen. The jacket wall thickness shall be in accordance with Table 4.1 of UL 360.

Temperature Rating

  • 80°C/176°F Dry
  • 60°C/140°F Wet
  • 70°C/158°F Oil resistant
  • -40°C

References & Ratings

  • UL 360 File E26540
  • NEC® 250.118(6), 350.60, 390.15, 501.10(B)(2), 502.10(A)(2), 503.10(A)(2), 511.7(A)(1), 620.21(A)(d), 645.5(D)(2), 680.21, 680.42, 695.6(E) and 695.14(E)
  • Department of Defense UL 360 adopted on October 1, 1987
  • ASTM® E 162 Flame Spread Index
  • ASTM® E 662 Smoke Density Generation
  • Bombardier SMP-800C Toxic Gas Generation
  • UL 94 Tests for Flammability of Plastic Materials for Parts
  • UL does not list any manufacturers liquidtight conduit as low smoke zero halogen

Reference Standards

ASTM® E 162
Flame Spread Index
ASTM® E 662
Smoke Density Generation
Bombardier SMP-800C
Toxic Gas Generation
UL 94
Tests for Flammability of Plastic Materials for Parts

Grounding

Permanent circuit ground protection is provided through the continuous bonding strip built into the conduit core in trade sizes 3/8 through 11⁄4. A separate grounding conductor is required by the NEC® for all trade sizes 11⁄2 and larger.

Markings

The surface of the outer jacket shall be clearly marked with a legible print legend in compliance with the UL 360 Standard.

Performance Tests

In accordance with UL 360, the completed LIQUID-TUFF™ LSZH Liquidtight Flexible Metal Conduit shall meet all of the performance requirements outlined below.

UL 360 Performance Tests

  • Resistance and High Current
  • Fault Current
  • Impact
  • Tension
  • Crushing
  • Pipe Stiffness
  • Flexibility
  • Low Temperature Flexibility
  • Zinc Coating
  • Vertical Flame
  • Physical Properties
  • Deformation
  • Mechanical Water Absorption
  • Moisture Penetration
  • Sunlight Resistance
  • Test for Secureness of Fittings
  • Test for Durability of Ink Printing
Ordering Information Product Dimensions/Bend Radius
Product CodeTrade Size (inches)Trade Size (mm)Coil Length (feet)Reel Length (feet)Approx. Weight/ 100 feet (pounds)External Diameter (inches) Over Conduit (min/max)External Diameter (inches) Over Jacket (min/max)Internal Diameter (min/max) inchesBend Radius (inches)
6701-30-003/812100'-240.594/0.6140.690/0.7100.484/0.5042
6702-30-001/216100'-310.732/0.7650.820/0.8400.622/0.6423.25
6702-45-001/216-500'310.732/0.7650.820/0.8400.622/0.6423.25
6702-60-001/216-1000'310.732/0.7650.820/0.8400.622/0.6423.25
6703-30-003/421100'-470.930/0.9601.030/1.0500.820/0.8404.25
6703-45-003/421-500'470.930/0.9601.030/1.0500.820/0.8404.25
6703-60-003/421-1000'470.930/0.9601.030/1.0500.820/0.8404.25
6704-30-00127100'-781.201/1.2261.290/1.3151.041/1.0666.5
6704-41-00127-400'781.201/1.2261.290/1.3151.041/1.0666.5
6705-24-001 1/43550'-1021.540/1.5701.630/1.6601.380/1.4108
6705-40-001 1/435-200'1021.540/1.5701.630/1.6601.380/1.4108
6705-47-001 1/435-750'1021.540/1.5701.630/1.6601.380/1.4108
6706-24-001 1/24150'-1071.735/1.7701.865/1.9001.575/1.6009
6707-24-0025350'-1442.180/2.2152.340/2.3752.020/2.04511.12
6708-22-002 1/26325'-1682.640/2.6752.840/2.8752.480/2.50514.62
LIQUID-TUFF LSZH Combustion and Flammability Properties
PROPERTYTESTRESULTS
Vertical Burn (Material)UL 94UL Listed: V-O Rating No Flaming Drips
Vertical Burn (Conduit)UL 360UL Listed: Passed
Oxygen Index % (Material)ASTM® D 286325%
Flame Spread IndexASTM® E-162PassedNo Flaming Drips
Smoke Generation (Flaming)ASTM® E662 (NFPA-258)Ds=13 @ 1.5 min Ds=57 @ 4.0 min No Flaming Drips
Smoke Generation (Non-flaming)ASTM® E662 (NFPA-258)Ds=1 @ 1.5 min Ds=8 @ 4.0 min No Flaming Drips
Toxic Gas GenerationBombardier SMP-800CPass
Minimum Acceptable Average Thickness of Jacket, (inches)
Conduit Trade Size, (Inches)Conduit Trade Size, (Metric)Minimum Acceptable Average Thickness of Jacket, (inches)
3/8120.030
1/2160.030
3/4210.035
1270.035
1 1/4350.035
1 1/2410.040
2530.040
2 1/2630.050
Acceptable Internal and External Diameters
Conduit Trade Size, (Inches)Conduit Trade Size, (Metric)Internal Diameter, Min. In.Internal Diameter, Max. In.Over Conduit, Min. In.Over Conduit, Max. In.Over Jacket, Min. In.Over Jacket, Max. In.
3/8120.4840.5040.5940.6140.6900.710
1/2160.6220.6420.7320.7650.8200.840
3/4210.8200.8400.9300.9601.0301.050
1271.0411.0661.2011.2261.2901.315
1 1/4351.3801.4101.5401.5701.6301.660
1 1/2411.5751.6001.7351.7701.8651.900
2532.0202.0452.1802.2152.3402.375
2 1/2632.4802.5052.6402.6752.8402.875