Duplex Service Drop Cable
The Duplex Service Drop Cable is a reliable overhead cable for secondary power distribution from the utility pole to the service entrance. Featuring two insulated phase conductors (aluminum or ACSR) twisted around a bare or covered neutral messenger wire, it offers excellent mechanical strength and weather resistance. Insulation options include XLPE, PE, or PVC for superior UV, moisture, and abrasion protection. Compliant with ASTM B-230, B-231, ICEA S-76-474, and ANSI/ICEA standards, this cable supports low-voltage applications up to 600V. Lightweight design facilitates easy installation with reduced sag and long spans. The Duplex Service Drop Cable ensures minimal power losses, high tensile strength from the messenger, and long service life in harsh outdoor conditions. Ideal for residential, commercial, and rural electrification projects requiring safe, cost-effective aerial service connections worldwide.
Construction
Technical Specifications
Quality Control
Application
Construction
Duplex Service Drop Cable Constrution
Conductor
Conductors are concentrically stranded, compressed 1350-H19 aluminum.
Specification
The Triplex service drop cable meets or exceeds the following ASTM specifications:
• ANSI/ICEA S-76-474, Neutran-supported power cable assemblies with weather-resistant extruded insulation rated 600V
• B-230 Aluminum Wire, 1350-H19 for Electrical Purposes.
• B-231 Aluminum Conductors, Concentric-Lay-Stranded.
• B-232 Aluminum Conductors, Concentric-Lay-Stranded, Coated Steel Reinforced (ACSR).
• B-399 Concentric-Lay-Stranded 6201-T81 Aluminum Alloy Conductors.
• B-901 Compressed Round Stranded Aluminum Conductors Using Single Input Wire.
• ANSI/ICEA S-76-474, Neutran-supported power cable assemblies with weather-resistant extruded insulation rated 600V
• B-230 Aluminum Wire, 1350-H19 for Electrical Purposes.
• B-231 Aluminum Conductors, Concentric-Lay-Stranded.
• B-232 Aluminum Conductors, Concentric-Lay-Stranded, Coated Steel Reinforced (ACSR).
• B-399 Concentric-Lay-Stranded 6201-T81 Aluminum Alloy Conductors.
• B-901 Compressed Round Stranded Aluminum Conductors Using Single Input Wire.
Insulation
Insulated with either polyethylene or crosslinked polyethylene (XLPE).
Neutral Messengers
Neutral messengers are concentrically stranded 6201, AAC, or ACSR.
Technical Specifications
Duplex Service Drop Cable
6201 ALLOY Neutral-messenger
AAC Neutral-messenger
ACSR Neutral-messenger
| Code Word | Phase Conductor | Bare Neutral Messenger | Weight Per 1000ft (lbs.) | Allowable Ampacities+ | |||||||
|
Size (AWG) |
Stranding |
Insul. Thick. (mils) |
Equiv. Dia. (AWG)++ |
Size (kcmil) |
Stranding |
Rated Strength (lbs.) |
XLPE | POLY | XLPE | POLY | |
| 6201 ALLOY NEUTRAL-MESSENGER | |||||||||||
| Chihuahua | 6 | 1 | 45 | 6 | 30.58 | 7 | 1110 | 65 | 65 | 85 | 70 |
| Vizsla | 6 | 7 | 45 | 6 | 30.58 | 7 | 1110 | 68 | 68 | 85 | 70 |
| Harrier | 4 | 1 | 45 | 4 | 48.69 | 7 | 1760 | 99 | 99 | 115 | 90 |
| Whippet | 4 | 7 | 45 | 4 | 48.69 | 7 | 1760 | 103 | 103 | 115 | 90 |
| Schnauzer | 2 | 7 | 45 | 2 | 77.47 | 7 | 2800 | 157 | 157 | 150 | 120 |
| Heeler | 1/0 | 9 | 60 | 1/0 | 123.3 | 7 | 4460 | 250 | 250 | 205 | 160 |
| * Code words for XLP insulated products are formed by adding "XLP" to the conventional code words above(e.g.-Chihuahua/XLP). + Conductor temperature of 90°C for XLP, 75°C for Poly; ambient temperature of 40°C; emissivity 0.9; 2 ft./sec. wind in sun. ++ Designated sizes are: ACSR 6/1 diameter equivalent and AAC with equivalent resistivity per ASTM B-399 for 6201. |
|||||||||||
| Code Word | Phase Conductor | Bare Neutral Messenger | Weight Per 1000ft (lbs.) | Allowable Ampacities+ | ||||||
|
Size (AWG) |
Stranding |
Insul. Thick. (mils) |
Size (kcmil) |
Stranding |
Rated Strength (lbs.) |
XLPE | POLY | XLPE | POLY | |
| AAC NEUTRAL-MESSENGER | ||||||||||
| Pekingese | 6 | 1 | 45 | 6 | 7 | 563 | 61 | 61 | 85 | 70 |
| Collie | 6 | 7 | 45 | 6 | 7 | 563 | 64 | 64 | 85 | 70 |
| Dachshund | 4 | 1 | 45 | 4 | 7 | 881 | 92 | 92 | 115 | 90 |
| Spaniel | 4 | 7 | 45 | 4 | 7 | 881 | 96 | 96 | 115 | 90 |
| Doberman | 2 | 7 | 45 | 2 | 7 | 1350 | 147 | 147 | 150 | 120 |
| Malemute | 1/0 | 9 | 60 | 1/0 | 7 | 1990 | 234 | 234 | 205 | 160 |
| * Code words for XLP insulated products are formed by adding "XLP" to the conventional code words above(e.g.-Chihuahua/XLP). + Conductor temperature of 90°C for XLP, 75°C for Poly; ambient temperature of 40°C; emissivity 0.9; 2 ft./sec. wind in sun. |
||||||||||
| Code Word | Phase Conductor | Bare Neutral Messenger | Weight Per 1000ft (lbs.) | Allowable Ampacities+ | ||||||
|
Size (AWG) |
Stranding |
Insul. Thick. (mils) |
Size (kcmil) |
Stranding |
Rated Strength (lbs.) |
XLPE | POLY | XLPE | POLY | |
| ACSR NEUTRAL-MESSENGER | ||||||||||
| Setter | 6 | 1 | 45 | 6 | 43252 | 1190 | 72 | 72 | 85 | 70 |
| Shepherd | 6 | 7 | 45 | 6 | 43252 | 1190 | 75 | 75 | 85 | 70 |
| Eskimo | 4 | 1 | 45 | 4 | 43252 | 1860 | 110 | 110 | 115 | 90 |
| Terrier | 4 | 7 | 45 | 4 | 43252 | 1860 | 115 | 115 | 115 | 90 |
| Chow | 2 | 7 | 45 | 2 | 43252 | 2850 | 176 | 176 | 150 | 120 |
| Bull | 1/0 | 9 | 60 | 1/0 | 43252 | 4380 | 280 | 280 | 205 | 160 |
| * Code words for XLP insulated products are formed by adding "XLP" to the conventional code words above(e.g.-Chihuahua/XLP). + Conductor temperature of 90°C for XLP, 75°C for Poly; ambient temperature of 40°C; emissivity 0.9; 2 ft./sec. wind in sun. |
||||||||||
Quality Control
Duplex Service Drop Cable
Raw Material Test
For the Duplex Service Drop Cable, raw material testing starts with aluminum alloy certification for conductivity and ductility. Phase conductor wires undergo resistivity, tensile, and wrap tests. Messenger material (ACSR/AAC) is checked for steel core strength and aluminum cladding adhesion. Insulation polymers are analyzed for carbon black dispersion (UV protection), melt index, and impurity levels via microscopy. Covering compounds face elongation and environmental cracking pre-checks. The structured process: receipt inspection, random sampling, physical/mechanical testing (yield, elongation), chemical verification using spectroscopy, accelerated UV/thermal aging simulation, and material release decision. This comprehensive evaluation secures premium inputs, providing the base for the Duplex Service Drop Cable's conductor performance, messenger load-bearing capacity, insulation weather resistance, and overall overhead durability.
Process inspection
Process inspection in Duplex Service Drop Cable production involves continuous quality checks. Phase conductor stranding monitors strand count and surface smoothness. Insulation extrusion ensures even coverage with real-time thickness gauges. Messenger preparation verifies core integrity. Twisting assembly controls lay ratio, tension balance, and phase symmetry. Covering extrusion (if present) includes online high-voltage spark testing. Critical steps: pre-extrusion material dryness verification, parameter stabilization, capacitance monitoring for eccentricity, intermediate sampling for adhesion, twisting tension logging, and defect removal protocols. This multi-stage control maintains the Duplex Service Drop Cable's balanced construction, uniform insulation, strong messenger support, and compliance with ASTM/ICEA standards throughout manufacturing for reliable aerial installation.
Finished Product
Completed Duplex Service Drop Cable reels are rigorously tested before shipment. Key routines: DC resistance measurement, high-potential spark test, insulation thickness, messenger tensile strength, and overall breaking load. Mechanical tests include elongation, cold bend, and impact. UV and heat aging simulations assess long-term weathering. The sequential process: reel sampling, conditioning in chambers, gradual load/voltage application, timed exposure monitoring, recovery inspection, property re-measurement, and documentation. Additional verifications cover sag calculation, phase identification, and marking permanence. Passing all confirms the Duplex Service Drop Cable's electrical reliability, mechanical endurance, weather resistance, and suitability for overhead secondary distribution in residential and commercial service drop applications.
Application
Commonly used for aerial service drops to single-family homes, duplexes, small shops, and temporary construction sites. Excellent for overhead lines in urban, suburban, and rural areas requiring weatherproof, self-supporting cables for safe power delivery from poles to buildings.
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
Product Packaging
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What are the advantages of power cables and overhead lines?(1) Reliable operation, because it is installed in a hidden place such as underground, it is less damaged by external forces, has less chance of failure, and the power supply is safe, and it will not cause harm to people; (2) The maintenance workload is small and frequent inspections are not required; (3) No need to erect towers; (4) Help improve power factor.
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Which aspects should be considered when choosing the cross section of a power cable?(1) The long-term allowable working current of the cable; (2) Thermal stability once short circuited; (3) The voltage drop on the line cannot exceed the allowable working range.
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What are the measures for cable fire prevention?(1) Use flame-retardant cables; (2) Use fireproof cable tray; (3) Use fireproof paint; (4) Fire partition walls and fire baffles are installed at cable tunnels, mezzanine exits, etc.; (5) Overhead cables should avoid oil pipelines and explosion-proof doors, otherwise local pipes or heat insulation and fire prevention measures should be taken.
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What should be paid attention to during the transportation and handling of cables?(1) During transportation, loading and unloading, cables and cable reels should not be damaged. It is strictly forbidden to push the cable reels directly from the vehicle. Generally, cables should not be transported and stored flat. (2) Before transporting or rolling the cable reel, ensure that the cable reel is firm, the cable is wound tightly, the oil pipe between the oil-filled cable and the pressure oil tank should be fixed without damage, the pressure oil tank should be firm, and the pressure indication should meet the requirements.
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What inspections should be carried out for the acceptance of cable lines?(1) The cable specifications should meet the regulations, the arrangement should be neat, no damage, and the signs should be complete, correct and clear; (2) The fixed bending radius of the cable, the related distance and the wiring of the metal sheath of the single-core power cable should meet the requirements; (3) The cable terminal and the middle head should not leak oil, and the installation should be firm. The oil pressure of the oil-filled cable and the meter setting should meet the requirements; (4) Good grounding; (5) The color of the cable terminal is correct, and the metal parts such as the bracket are completely painted; (6) There should be no debris in the cable trench, tunnel, and bridge, and the cover should be complete.
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