TTU Cable 600V – AL(AA-8000)/XLPE/PVC – Aluminum Alloy Power Cable for Underground Industrial Applications
TTU Cable 600V – AL(AA-8000)/XLPE/PVC – Aluminum Alloy Power Cable for Underground Industrial Applications
Product Overview
The TTU Cable 600V – AL(AA-8000)/XLPE/PVC is a specialized transformer tap unit (TTU) cable designed for secondary distribution networks, transformer connections, and service entrance applications. Rated at 600V, this cable features AA-8000 series aluminum alloy conductor, XLPE insulation, and a PVC outer sheath.
AA-8000 aluminum alloy provides excellent creep resistance, flexibility, and corrosion resistance – making it a reliable and cost-effective alternative to copper for low voltage distribution. The XLPE insulation offers high thermal rating (90°C) and superior dielectric strength, while the PVC sheath provides durability and moisture protection.
Voltage rating: 600V
Conductor material: AA-8000 series aluminum alloy (compact stranded)
Insulation: XLPE (Cross-linked Polyethylene)
Sheath: PVC (Polyvinyl Chloride)
Standards: ASTM B800, ASTM B801, UL 83, UL 44 (optional)
Key Features
| Feature | Benefit |
|---|---|
| AA-8000 aluminum alloy conductor | Excellent creep resistance, comparable to copper in terminations |
| XLPE insulation | Higher current rating, better thermal stability (90°C continuous) |
| 600V rating | Suitable for secondary distribution and transformer tap applications |
| Lightweight | 50% lighter than copper – easier handling, lower installation cost |
| Compact stranding | Improved flexibility, smaller overall diameter |
| PVC outer sheath | Good mechanical protection, moisture resistance, UV resistant (optional) |
| Corrosion resistant | Performs well in various environments |
Applications
The TTU Cable 600V – AL(AA-8000)/XLPE/PVC is widely used in:
1. Transformer Tap Units (TTU)
- Connecting pad-mounted transformers to secondary distribution networks
- Low voltage side of distribution transformers
2. Secondary Distribution Networks
- Underground residential distribution (URD)
- Feeder cables between distribution points
3. Service Entrance
- Commercial and industrial building service feeds
- Meter pedestal connections
4. Renewable Energy
- Solar farm collection systems (low voltage side)
- Wind turbine auxiliary power connections
5. Industrial & Commercial Power
- Feeder cables for lighting and power panels
- Control circuits where aluminum alloy is specified
Construction Details
| Layer | Material | Function |
|---|---|---|
| Conductor | AA-8000 series aluminum alloy (compact stranded) | High conductivity, creep resistance, lightweight |
| Conductor Shield | Semi-conductive layer (optional, depends on voltage) | Even electrical stress distribution |
| Insulation | XLPE (Cross-linked Polyethylene) | High dielectric strength, 90°C rating |
| Filler/Binder | Polypropylene or paper (multi-core versions) | Maintains circular shape |
| Inner Sheath | Optional (for multi-core cables) | Bedding for armour or screening |
| Outer Sheath | PVC (Polyvinyl Chloride) | Mechanical protection, moisture resistance |
Note: TTU cables are typically single-core or multi-core depending on application.
Technical Specifications (Single Core – Typical Values)
| Parameter | Value |
|---|---|
| Rated Voltage | 600V |
| Conductor Material | AA-8000 series aluminum alloy |
| Conductor Sizes Available | 1/0 AWG, 2/0 AWG, 3/0 AWG, 4/0 AWG, 250 kcmil, 350 kcmil, 500 kcmil, 750 kcmil |
| Insulation Material | XLPE |
| Insulation Thickness | 1.14mm – 2.41mm (depending on conductor size, per UL 44) |
| Sheath Material | PVC (black) |
| Sheath Thickness | 1.14mm – 2.03mm |
| Operating Temperature | -40°C to +90°C (normal), +130°C (emergency overload) |
| Short Circuit Temperature | 250°C (max) |
| Minimum Bending Radius | 5 × overall diameter (single-core) |
| Flame Test | UL 1581 VW-1 (optional) |
| Sunlight Resistance | Optional (UV-stabilized PVC) |
| Direct Burial | Yes, with appropriate installation |
Available Sizes & Current Ratings (Single Core, 90°C XLPE, in Duct/Air)
| AWG/kcmil | Conductor Diameter (mm) | Approx. Weight (kg/km) | Current Rating (Air, 90°C) |
|---|---|---|---|
| 1/0 AWG (53.5mm²) | ~8.4 | ~150 | ~150A |
| 2/0 AWG (67.4mm²) | ~9.4 | ~185 | ~175A |
| 3/0 AWG (85.0mm²) | ~10.5 | ~230 | ~200A |
| 4/0 AWG (107.2mm²) | ~11.7 | ~290 | ~230A |
| 250 kcmil (126.7mm²) | ~12.8 | ~340 | ~255A |
| 350 kcmil (177.3mm²) | ~15.0 | ~470 | ~310A |
| 500 kcmil (253.4mm²) | ~17.8 | ~670 | ~380A |
| 750 kcmil (380.0mm²) | ~21.6 | ~990 | ~475A |
Values are indicative. Current ratings depend on installation conditions. Please request official datasheet for exact specifications.
Why Choose AA-8000 Aluminum Alloy Over Copper?
| Feature | AA-8000 Aluminum Alloy | Copper |
|---|---|---|
| Weight | ~50% lighter | Heavier |
| Cost | ~40-50% lower | Higher |
| Creep resistance | Excellent (AA-8000 specific) | Excellent |
| Termination compatibility | Requires AA-8000 rated lugs | Standard lugs work |
| Corrosion resistance | Good | Very good |
| Conductivity (% IACS) | ~61% | 100% |
| Flexibility | Good (compact stranding) | Very good |
AA-8000 aluminum alloy is specifically designed for electrical applications and, when properly terminated with compatible connectors, performs reliably equivalent to copper.
Standards Compliance
| Standard | Description |
|---|---|
| ASTM B800 | Standard specification for AA-8000 aluminum alloy wire |
| ASTM B801 | Standard specification for AA-8000 aluminum alloy conductors |
| UL 83 | Thermoplastic-insulated wires and cables |
| UL 44 | Thermoset-insulated wires and cables (XLPE) |
| CSA C22.2 No. 38 | Aluminum alloy wire and cable (Canadian standard) |
Comparison with Standard Aluminum (1350) Conductor
| Feature | AA-8000 Alloy | 1350 EC Aluminum |
|---|---|---|
| Creep resistance | Excellent (special alloy) | Poor (prone to loosening) |
| Termination reliability | High (with proper lugs) | Low (requires retorquing) |
| Flexibility | Good (compact stranding) | Poor |
| Conductivity | ~61% IACS | ~61% IACS |
| Code compliance | Required for most modern applications | Not recommended for terminations |
Packaging & Delivery
Packaging: Wooden reels, steel reels, or coils (depending on size)
Length per reel: 500m, 1000m, or custom lengths
Lead time: 15–25 days after deposit confirmation
Shipping: Sea freight, air freight, or express courier for sample orders
Why Buy From Us?
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Direct manufacturer – factory pricing, quality control
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ISO 9001, CE, RoHS certified
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Free samples available (shipping cost only)
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12-month warranty against manufacturing defects
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OEM/ODM supported – custom printing, sheath color, packaging
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Technical support – fast response to technical queries
Frequently Asked Questions (FAQ)
Q: What does TTU cable stand for?
A: TTU stands for Transformer Tap Unit. These cables are specifically designed to connect pad-mounted transformers to secondary distribution networks at 600V.
Q: Why use AA-8000 aluminum alloy instead of standard aluminum?
A: AA-8000 series aluminum alloy is specifically formulated to address the creep and termination issues of standard EC aluminum (1350). It offers excellent creep resistance, making terminations more reliable and maintenance-free.
Q: Can I terminate AA-8000 cable with standard copper lugs?
A: No. AA-8000 aluminum alloy requires connectors specifically rated for aluminum (typically tin-plated or bi-metallic lugs) to prevent galvanic corrosion and ensure proper contact pressure.
Q: Is this cable suitable for direct burial?
A: Yes, the PVC outer sheath provides good moisture resistance. For direct burial applications, we recommend confirming that the specific PVC compound is rated for underground use.
Q: What is the temperature rating of the XLPE insulation?
A: The XLPE insulation is rated for 90°C continuous operation, 130°C emergency overload, and 250°C short circuit conditions.
Q: Do you provide free samples?
A: Yes, we provide free samples of the TTU cable. The customer is only responsible for the shipping cost.
Q: What is the minimum order quantity (MOQ)?
A: MOQ depends on the conductor size.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.