Low Smoke Zero Halogen (LSZH) Liquid-Tight Flexible Metal Conduits (LFMC) Reduce Gas Emissions
Description
Low Smoke Zero Halogen (LSZH) Liquid-Tight Flexible Metal Conduits (LFMC) reduce the quantity of toxic gas and smoke during an emergency or combustion due to their halogen-free thermoplastic polyurethane jackets. The jackets provide the same flame-retardant features as other conduit and cable jackets but limit smoke and corrosive gas emissions that can harm individuals and damage equipment.
When in contact with flames, LSZH LFMC products release smoke at a lower rate and density, creating a safer environment and a more distinct exit path for workers and individuals during a fire.
AFC Cable Systems offers two LSZH flexible metal conduits, Non-UL Low Smoke Zero Halogen Cable – Type LSZH-VF and UL Low Smoke Zero Halogen Conduits – Type LSZH, LFMC. Both LFMC products feature a hot-dipped zinc galvanized low-carbon steel core, and black thermoplastic polyurethane jacket, and comply with the following 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
Specs
Non-UL Low Smoke Zero Halogen Cable – Type LSZH-VF
Temperature Rating
- 80°C/176°F Dry
- 60°C/140°F Wet
- 70°C/158°F Oil resistant
- –40°C
References & Ratings
- Non-UL core
- 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
A separate grounding conductor is required for all trade sizes.
Markings
The surface of the outer jacket shall be clearly marked with the applicable print legend.
Performance Tests
The completed LIQUID-TUFF LSZH Non-UL Liquidtight Flexible Metal Conduit shall meet all of the performance requirements outlined below.
- Flexibility
- Low Temperature Flexibility
- Zinc Coating
- Vertical Flame
- Physical Properties
- Deformation
- Mechanical Water Absorption
- Moisture Penetration
- Sunlight Resistance
- Test for Durability of Ink Printing
UL Low Smoke Zero Halogen Conduits – Type LSZH, LFMC:
Temperature Rating
- 80°C/176°F Dry
- 60°C/140°F Wet
- 70°C/158°F Oil resistant
- –40°C/-40°F Low Temperature
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
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