American Wire Gauge (AWG) | 22 | 24 |
Pairs | 2 | 2 |
3 | 3 |
Conductor-AWG | Minimum Elongation-Percent |
22 | 20 |
24 | 16 |
AWG | Nominal Diameter | |
Millimeters (mm) | (Inches (in.)) | |
22 | 0.643 | (0.0253) |
24 | 0.511 | (0.0201) |
AWG | Direct Current Voltages (Kilovolts) |
22 | 6.0 |
24 | 5.0 |
Property | Polyethylene | Crystalline Propylene/Ethylene Copolymer |
Melt Flow Rate | ||
Percent increase from raw material, Maximum | ||
[LESS THAN]0.5 (Initial Melt Index) | 50 | - |
0.5-2.00 (Initial Melt Index) | 25 | - |
[LESS THAN EQUAL TO]5.0 (Initial Melt Index) | - | 110 |
Tensile Strength-Minimum | ||
Megapascals (MPa) | 16.5 | 21.0 |
(Pounds per Square Inch (psi)) | (2,400) | (3,000) |
Ultimate Elongation | ||
Minimum, Percent | 300 | 300 |
Cold Bend | ||
Failures, Maximum | 0/10 | 0/10 |
Shrinkback | ||
Maximum, mm (in.) | 10 (0.375) | 10 (0.375) |
Oxygen Induction Time | ||
Minimum, Minutes | 20 | 20 |
Note: Quality assurance testing at a jaw separation speed of 500 mm/min (20 in./min) is permissible. Failures at this rate must be retested at the 50 mm/min (2 in./min) rate to determine section compliance.
Material | Temperature |
Polyethylene | 115 ±1 °C |
Crystalline propylene/ethylene Copolymer | 130 ±1 °C |
Pair No. | Color | |
Tip | Ring | |
1 | White | Blue |
2 | White | Orange |
3 | White | Green |
Pair No. | Color | |
Tip | Ring | |
1 | White with blue stripe | Blue |
2 | White with orange stripe | Orange |
Standard Wire | Gopher Resistant Wire |
Copper Alloy 220 (Bronze) | Copper-Clad Stainless Steel |
(0.1016 ±0.0076 mm) | 0.1270 ±0.0127 mm |
(0.0040 ±0.0003 in.) | (0.0050 ±0.0005 in.) |
Copper Alloy 220 (Bronze) | Copper Alloy 664 |
0.1270 ±0.0127 mm | 0.1397 ±0.0127 mm |
(0.0050 ±0.0005 in.) | (0.0055 ±0.0005 in.) Copper-Clad Alloy Steel 0.1270 ±0.0127 (0.0050 ±0.0005 in.) |
Property | Requirement |
Tensile Strength | |
Minimum, MPa (psi) | 379 (55,000) |
Tensile Yield | |
Minimum, MPa (psi) | 241 (35,000) |
Elongation | |
Minimum, percent in 50 mm (2 in.) | 15 |
Property | LLDHMW, Ethylene Copolymer | LDHMW Polyethylene | HD or MD Polyethylene |
Melt Flow Rate Percent increase from raw material Maximum | 50 | 50 | |
[LESS THAN]0.41 (Initial Melt Index) | 100 | - | - |
0.41-2.00 (Initial Melt Index) | 50 | - | - |
Tensile Strength Minimum, MPa (psi) | 12.0 (1,700) | 12.0 (1,700) | 16.5 (2,400) |
Ultimate Elongation Percent, Minimum | 400 | 400 | 300 |
Shrinkback Percent of Length, Maximum | 5 | 5 | 5 |
Impact Failures, Maximum | 2/10 | 2/10 | 2/10 |
Conductor AWG | Individual Pair Attenuation dB/km (decibel/mile (dB/mile)) | |
Maximum | Minimum | |
22 | 6.8 (11.0) | 5.0 (8.1) |
24 | 8.7 (14.0) | 6.6 (10.7) |
AWG | Maximum Resistance | |
ohms/kilometer | (ohms/1000 ft) | |
22 | 57.1 | (17.4) |
24 | 90.2 | (27.5) |
Wire Designation
BFW
Wire Construction
Pair Count
Conductor Gauge
N = Copper Alloy 220 (Bronze) Shield
Y = Gopher Resistant Shields
Example: BFWY 3-24
Buried Filled Wire, Gopher Resistant Shield, 3 pair, 24 AWG
(The information and recordkeeping requirements of this section have been approved by the Office of Management and Budget under the control number 0572-0059)
Appendix A to § 1755.860 -Qualification Test Methods
Environmental Conditioning ______________
FREQUENCY 1 KILOHERTZ
PAIR NUMBER | CAPACITANCE | CONDUCTANCE | ||
nF/km | (nF/mile) | micromhos/km | (micromhos/mile) | |
Initial | Final | Initial | Final | |
1 | ________ | ________ | ________ | ________ |
2 | ________ | ________ | ________ | ________ |
3 | ________ | ________ | ________ | ________ |
Average x | ________ | ________ | ________ | ________ |
Overall Percent Difference in Average x Capacitance:____________________________ Conductance: ____________________________
Environmental Conditioning ________________________
FREQUENCY 150 KILOHERTZ
PAIR NUMBER | CAPACITANCE | CONDUCTANCE | ATTENUATION | |||
nF/km | (nF/mile) | micromhos/km | (micromhos/mile) | dB/km | (dB/mile) | |
Initial | Final | Initial | Final | Initial | Final | |
1 | ______ | ______ | ______ | ______ | ______ | ______ |
2 | ______ | ______ | ______ | ______ | ______ | ______ |
3 | ______ | ______ | ______ | ______ | ______ | ______ |
Average x | ______ | ______ | ______ | ______ | ______ | ______ |
Overall Percent Difference in Average x Capacitance:______________________ Conductance: ______________________ Attenuation:______________________
Environmental Conditioning ______________________________
WATER IMMERSION TEST ( 1 KILOHERTZ)
PAIR NUMBER | CAPACITANCE | CONDUCTANCE | ||||
nF/km | (nF/mile) | micromhos/km | (micromhos/mile) | |||
Initial | 24 hours | Final | Initial | 24 hours | Final | |
1 | ______ | ______ | ______ | ______ | ______ | ______ |
2 | ______ | ______ | ______ | ______ | ______ | ______ |
3 | ______ | ______ | ______ | ______ | ______ | ______ |
Average x | ______ | ______ | ______ | ______ | ______ | ______ |
Overall Percent Difference in Average x Capacitance:____________________________ Conductance: ____________________________
Water Penetration Test
Option A | Option B | |||
End Leakage grams | Weight Gain grams | End Leakage grams | Penetration mm (in.) | |
Control | __________ | __________ | __________ | __________ |
Heat Age | __________ | __________ | __________ | __________ |
Humidity Exposure | __________ | __________ | __________ | __________ |
Temperature Cycling | __________ | __________ | __________ | __________ |
Insulation Compression
Failures | |
Control | ________________ |
Heat Age | ________________ |
Humidity Exposure | ________________ |
Temperature Cycling | ________________ |
Jacket Slip Strength @ 50 °C
Load in newtons (pound-force) | |
Control | ________________ |
Heat Age | ________________ |
Humidity Exposure | ________________ |
Temperature Cycling | ________________ |
Filler Exudation (grams)
Heat Age | ________________ |
Humidity Exposure | ________________ |
Temperature Cycle | ________________ |
Surge Test (kilovolts)
Conductor to Conductor | ________________ |
Shield to Conductors | ________________ |
Appendix B to § 1755.860 -Sheath Slitting Cord Qualification
Appendix C to § 1755.860 -Thermal Reel Wrap Qualification
7 C.F.R. §1755.860