336 Limpet Aluminum Conductor Triplex Overhead Service Drop Cable
The 336 Limpet Triplex Aluminum Overhead Service Drop Cable is specifically designed for reliable and efficient power distribution from utility poles to residential, commercial, and light industrial service entrances. This cable features two insulated aluminum phase conductors and a bare ACSR (Aluminum Conductor Steel Reinforced) messenger, which serves as both the neutral conductor and the primary mechanical support for the cable. The conductors are insulated with black cross-linked polyethylene (XLP), delivering exceptional UV resistance, moisture protection, and long-term outdoor durability. Rated 600V phase-to-phase with conductor temperatures up to 90°C (XLPE), it supports ampacity ratings around 395–445A (depending on conditions). Compliant with ASTM B-230, B-231, B-232, and ICEA S-76-474 standards, the 336 Limpet offers lightweight, corrosion-resistant construction ideal for demanding secondary distribution and large-scale service drops.
Construction
Technical Specifications
Quality Control
Application
Construction
336 Limpet Aluminum Conductor Triplex Overhead Service Drop Cable Constrution
Standard
• ASTM B-230 Aluminum Wire, 1350-H19 for Electrical Purposes.
• ASTM B-231 Aluminum Conductors, Concentric-Lay-Stranded.
• ASTM B-232 Aluminum Conductors, Concentric-Lay-Stranded, Coated Steel Reinforced (ACSR).
• ASTM B-399 Concentric-Lay-Stranded 6201-T81 Aluminum Alloy Conductors.
• ICEA S-76-474-Neutral-supported Power Cable Assemblies With Weather-Resistant Extruded Insulation Rated 600 Volts.
• ASTM B-231 Aluminum Conductors, Concentric-Lay-Stranded.
• ASTM B-232 Aluminum Conductors, Concentric-Lay-Stranded, Coated Steel Reinforced (ACSR).
• ASTM B-399 Concentric-Lay-Stranded 6201-T81 Aluminum Alloy Conductors.
• ICEA S-76-474-Neutral-supported Power Cable Assemblies With Weather-Resistant Extruded Insulation Rated 600 Volts.
Phase Conductor
Strand or Compressed 1350-H19 Series Aluminum Conductor.
Neutral (Messenger) Conductor
Bare ACSR messenger.
Insulation
Black Cross Linked Polyethylene (XLP) Insulation.
Key Features
1. Bare ACSR messenger for high tensile strength and durability
2. Optimized for 120/240V single-phase overhead service drops
3. XLP insulation provides superior UV and weather resistance
4. Complies with ASTM and ICEA standards for quality assurance
5. Suitable for long-term outdoor exposure
2. Optimized for 120/240V single-phase overhead service drops
3. XLP insulation provides superior UV and weather resistance
4. Complies with ASTM and ICEA standards for quality assurance
5. Suitable for long-term outdoor exposure
Application
336 Limpet Aluminum Conductor Overhead Service Drop Cable Wire has three conductors, with one of them being for the neutral path, and two electrodes. Used to supply power, usually from a pole-mounted transformer, to the user's service head, where connection to the service entrance cable is made. To be used at voltages of 600 volts phase-to-phase or less and at conductor temperatures not to exceed 75°C for polyethylene insulated conductors or 90°C for cross-linked polyethylene (XLPE) insulated conductors.
Technical Specifications
336 Limpet Aluminum Conductor Triplex Overhead Service Drop Cable
336 Limpet Aluminum Conductor Triplex Overhead Service Drop Cable
| Rated voltage | V | 600 |
| Test voltage | Veff kV/Hz | 4/50 |
| Laying temperature | °C | min. -5 |
| Operating temperature | °C | -30 ~ +90 |
| Conductor temperature | °C | max. +90 |
| Short-circuit temperature | °C/s | max. +250 /5 |
| Bending radius (min.) | mm | 20 × Ø of cable |
Quality Control
336 Limpet Aluminum Conductor Triplex Overhead Service Drop Cable
Raw Material Test
Raw Material Test for 336.4 Limpet Aluminum Conductor Triplex Overhead Service Drop Cable ensures premium materials from the start. The structured process includes: Supplier Certification Review: Verify 1350-H19 aluminum and ACSR components meet ASTM B-230/B-231/B-232 specs for purity (>99.5% Al), stranding, and mechanical properties. Physical & Electrical Analysis: Test aluminum samples for tensile strength (>175 MPa), elongation, and conductivity (≥61% IACS); ACSR checked for zinc coating thickness, breaking load, and strand integrity. Dimensional Verification: Measure rod/wire diameters, 19-strand phase counts, 18/1 ACSR neutral configuration, and weights per unit length using precision instruments. Insulation Compound Check: XLPE pellets evaluated for density, melt index, tensile strength (>800 psi), elongation (>150%), and UV/carbon black additives for optimal weatherproofing.
Process inspection
Process Inspection during manufacturing of 336.4 Limpet Aluminum Conductor Triplex Overhead Service Drop Cable maintains precision and defect-free output. Steps include: Conductor Stranding: Monitor 19-strand compressed formation for uniform lay length, compactness, and alignment with online gauges. Insulation Extrusion: Apply black XLPE at nominal 80 mils thickness; inline scanners, diameter monitors, and spark testers ensure concentricity, uniformity, and no voids. Triplex Cabling: Helically assemble two insulated phases around the bare 336.4 MCM ACSR neutral under controlled tension for balanced structure and strong support. Continuous Real-Time Checks: Monitor conductor resistance, insulation integrity, cabling pitch, and overall diameter throughout stages.
Finished Product
Finished Product Test confirms the 336.4 Limpet Aluminum Conductor Triplex Overhead Service Drop Cable meets all performance criteria before release. The procedure includes: Visual & Dimensional Inspection: Examine full reel for surface defects, triplex uniformity, insulation consistency, markings, and measure diameter/weight per 1000 ft. Electrical Tests: Conduct DC resistance, insulation resistance (>1000 MΩ·km), and AC high-voltage withstand (per ICEA, e.g., 4–6kV) to verify dielectric strength. Mechanical Evaluation: Perform tensile strength, elongation, and breaking load tests (ACSR neutral ~8680 lbs rated) per ASTM B-230/B-232.Insulation Durability: XLPE samples tested for tensile, elongation, heat aging, thermal shock, and UV/weather resistance.Ampacity & Thermal Confirmation: Validate ratings (~395–445A at 90°C XLPE) through standard calculations and sample thermal stability.
Application
The 336 Limpet Aluminum Conductor Triplex Overhead Service Drop Cable is perfect for high-load overhead drops from transformers to commercial/industrial buildings, extensive secondary distribution networks, large residential complexes, and utility lines requiring high ampacity, strong messenger support, and long-term weather resistance in aerial installations.
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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