Features and Benefits

  • Superior temperature ratings
  • Hot dipped zinc galvanized low carbon steel core
  • UL bonding strip 3/8″ – 11⁄4″ for grounding
  • Sunlight resistant
  • Flame retardant PVC jacket – Grey

Applications

  • High temperature use
  • Machine tool wiring applications
  • Ideal for cold climate installations
  • 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
  • Site lighting and other outdoor wiring jobs

Construction

The Type Hi-Low Liquidtight Flexible Steel Conduit shall be formed from a zinc coated galvanized low carbon steel strip having a uniform width and thickness. The construction shall be in accordance with UL 360. The finished Type Hi-Low LFMC dimensions shall be in accordance with Table 5.1 of UL 360 which is summarized in Table 3.

Jacket – PVC

A rugged moisture, oil and sunlight resistant polyvinyl chloride (PVC) jacket shall be applied directly over the flexible metal conduit with a wall thickness in accordance with Table 4.1 of UL 360.

Temperature Rating

  • 105°C/221°F Dry
  • -55°C/-67°F Low temperature
  • 60°C Wet
  • 70°C Oil resistant

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

Grounding

Permanent circuit ground protection is provided through the continuous bonding strip built into the conduit core in sizes 3/8″ through 11⁄4″. A separate grounding conductor is required by the NEC® for 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 UL 360.

Performance Tests

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

UL 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
UL Hi-Low Temperature Liquidtight Flexible Steel Conduit, Type LFMC
Product CodeTrade Size (inches)Trade Size (mm)Coil Length (feet)Reel Length (feet)Approx. Weight/ 100 feet (pounds)External Diameter (inches)Over Conduit Over Jacket (min/max) (min/max)Internal Diameter (min/max) inchesBend Radius (inches)
6901-30-003/812100'-250.594/0.6140.690/0.7100.484/0.5042
6902-30-001/216100'-310.732/0.7650.820/0.8400.622/0.6423.25
6902-45-001/216-500'310.732/0.7650.820/0.8400.622/0.6423.25
6902-60-001/216-1000'310.732/0.7650.820/0.8400.622/0.6423.25
6903-30-003/421100'-480.930/0.9601.030/1.0500.820/0.8404.25
6903-45-003/421-500'480.930/0.9601.030/1.0500.820/0.8404.25
6903-60-003/421-1000'480.930/0.9601.030/1.0500.820/0.8404.25
6904-30-00127100'-801.201/1.2261.290/1.3151.041/1.0666.5
6904-41-00127-400'801.201/1.2261.290/1.3151.041/1.0666.5
6905-24-0011/43550'-1051.540/1.5701.630/1.6601.380/1.4108
6906-24-0011/24150'-1101.735/1.7701.865/1.9001.575/1.6009
6907-24-0025350'-1472.180/2.2152.340/2.3752.020/2.04511.12
6908-22-0021/26325'-1722.640/2.6752.840/2.8752.480/2.50514.62
6909-22-0037825'-2003.295/3.3353.460/3.5003.070/3.10017.5
6910-22-0031/29125'-2353.720/3.7893.960/4.0003.500/3.54020
6911-22-00410325'-2564.220/4.2804.460/4.5004.000/4.04024
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
11/4350.035
11/2410.040
2530.040
21/2630.050
3780.050
31/2910.060
41030.060
Conduit SizeTrade Metric SizeIn. DesignatorInternal DiameterIn. Min. Max.Over ConduitIn. Min. Max.Over Jacket
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
3783.0703.1003.2953.3353.4603.500
3 1⁄2913.5003.5403.7203.7893.9604.000
41034.0004.0404.2204.2804.4604.500