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
| Product Code | Trade 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) inches | Bend Radius (inches) |
|---|---|---|---|---|---|---|---|---|---|
| 6901-30-00 | 3/8 | 12 | 100' | - | 25 | 0.594/0.614 | 0.690/0.710 | 0.484/0.504 | 2 |
| 6902-30-00 | 1/2 | 16 | 100' | - | 31 | 0.732/0.765 | 0.820/0.840 | 0.622/0.642 | 3.25 |
| 6902-45-00 | 1/2 | 16 | - | 500' | 31 | 0.732/0.765 | 0.820/0.840 | 0.622/0.642 | 3.25 |
| 6902-60-00 | 1/2 | 16 | - | 1000' | 31 | 0.732/0.765 | 0.820/0.840 | 0.622/0.642 | 3.25 |
| 6903-30-00 | 3/4 | 21 | 100' | - | 48 | 0.930/0.960 | 1.030/1.050 | 0.820/0.840 | 4.25 |
| 6903-45-00 | 3/4 | 21 | - | 500' | 48 | 0.930/0.960 | 1.030/1.050 | 0.820/0.840 | 4.25 |
| 6903-60-00 | 3/4 | 21 | - | 1000' | 48 | 0.930/0.960 | 1.030/1.050 | 0.820/0.840 | 4.25 |
| 6904-30-00 | 1 | 27 | 100' | - | 80 | 1.201/1.226 | 1.290/1.315 | 1.041/1.066 | 6.5 |
| 6904-41-00 | 1 | 27 | - | 400' | 80 | 1.201/1.226 | 1.290/1.315 | 1.041/1.066 | 6.5 |
| 6905-24-00 | 11/4 | 35 | 50' | - | 105 | 1.540/1.570 | 1.630/1.660 | 1.380/1.410 | 8 |
| 6906-24-00 | 11/2 | 41 | 50' | - | 110 | 1.735/1.770 | 1.865/1.900 | 1.575/1.600 | 9 |
| 6907-24-00 | 2 | 53 | 50' | - | 147 | 2.180/2.215 | 2.340/2.375 | 2.020/2.045 | 11.12 |
| 6908-22-00 | 21/2 | 63 | 25' | - | 172 | 2.640/2.675 | 2.840/2.875 | 2.480/2.505 | 14.62 |
| 6909-22-00 | 3 | 78 | 25' | - | 200 | 3.295/3.335 | 3.460/3.500 | 3.070/3.100 | 17.5 |
| 6910-22-00 | 31/2 | 91 | 25' | - | 235 | 3.720/3.789 | 3.960/4.000 | 3.500/3.540 | 20 |
| 6911-22-00 | 4 | 103 | 25' | - | 256 | 4.220/4.280 | 4.460/4.500 | 4.000/4.040 | 24 |
| Conduit Trade Size (inches) | Conduit Trade Size (Metric) | Minimum Acceptable Average Thickness of Jacket, (inches) |
|---|---|---|
| 3/8 | 12 | 0.030 |
| 1/2 | 16 | 0.030 |
| 3/4 | 21 | 0.035 |
| 1 | 27 | 0.035 |
| 11/4 | 35 | 0.035 |
| 11/2 | 41 | 0.040 |
| 2 | 53 | 0.040 |
| 21/2 | 63 | 0.050 |
| 3 | 78 | 0.050 |
| 31/2 | 91 | 0.060 |
| 4 | 103 | 0.060 |
| Conduit Size | Trade Metric Size | In. Designator | Internal Diameter | In. Min. Max. | Over Conduit | In. Min. Max. | Over Jacket |
|---|---|---|---|---|---|---|---|
| 3/8 | 12 | 0.484 | 0.504 | 0.594 | 0.614 | 0.690 | 0.710 |
| 1/2 | 16 | 0.622 | 0.642 | 0.732 | 0.765 | 0.820 | 0.840 |
| 3/4 | 21 | 0.820 | 0.840 | 0.930 | 0.960 | 1.030 | 1.050 |
| 1 | 27 | 1.041 | 1.066 | 1.201 | 1.226 | 1.290 | 1.315 |
| 1 1⁄4 | 35 | 1.380 | 1.410 | 1.540 | 1.570 | 1.630 | 1.660 |
| 1 1⁄2 | 41 | 1.575 | 1.600 | 1.735 | 1.770 | 1.865 | 1.900 |
| 2 | 53 | 2.020 | 2.045 | 2.180 | 2.215 | 2.340 | 2.375 |
| 2 1⁄2 | 63 | 2.480 | 2.505 | 2.640 | 2.675 | 2.840 | 2.875 |
| 3 | 78 | 3.070 | 3.100 | 3.295 | 3.335 | 3.460 | 3.500 |
| 3 1⁄2 | 91 | 3.500 | 3.540 | 3.720 | 3.789 | 3.960 | 4.000 |
| 4 | 103 | 4.000 | 4.040 | 4.220 | 4.280 | 4.460 | 4.500 |