CCT Covered Conductor
CCT covered conductor to AS/NZS 3675 is available for 6.35/11 kV, 12.7/22 kV and 19/33 kV overhead networks. Product groups include 6201 and 1120 aluminium-alloy conductors with voltage-specific polymeric coverings; the 1120 construction is available with longitudinal water blocking, and applicable designs use XLPE or an XLPE/HDPE layer system. CCT is used on covered overhead lines, including spacer cable and insulated unscreened conductor arrangements.
Product Overview
CCT is an unscreened medium-voltage covered conductor rather than a conventional screened power cable. Its covering and mechanical design allow it to operate within an engineered overhead system and can provide improved performance in vegetation-exposed or polluted environments. Any vegetation contact remains dependent on abrasion, wind, conductor temperature, line clearances and maintenance conditions.
The 6201 and 1120 alloy groups have different electrical and mechanical properties and should not be treated as interchangeable. Longitudinal water blocking is identified for the 1120 construction, while covering thickness and finished dimensions vary with voltage and product design. Selection should therefore state the working voltage, alloy group, conductor size, covering system, water-blocking requirement, route environment and whether the conductor will be used on a conventional covered line, spacer cable or IUC system.
Key Features
- Water-blocked 1120 construction:Longitudinal water blocking is available with the 1120 aluminium-alloy construction to help limit moisture movement along the stranded conductor under the specified test conditions.
- 6201 and 1120 alloy groups:Separate 6201 and 1120 alloy groups provide different conductor properties, giving the line designer technical specification choices for mechanical and electrical requirements without merging the two materials.
- XLPE and XLPE/HDPE coverings:XLPE and XLPE/HDPE covering options are linked to the stated voltage and dimensions, providing the surface construction required for the selected CCT environment and installation system.
- Covered-line, spacer and IUC arrangements:The conductor can operate within conventional covered lines, spacer cable or IUC arrangements when matched fittings and clearances are used, allowing one product family to support several overhead concepts.
Product Applications
- 35/11 kV and 12.7/22 kV overhead distribution networks whose specification calls for AS/NZS 3675 CCT
- Vegetation-exposed, coastal, polluted or moisture-prone corridors where a water-blocked covered conductor forms part of the risk-control design
- Conventional covered lines, spacer cable systems or insulated unscreened conductor arrangements using compatible hardware and line geometry
Technical Specifications
Technical data is grouped by 6201 or 1120 alloy and by 11 kV, 22 kV or 33 kV working-voltage range under AS/NZS 3675.
AS/NZS 3675 CCT Construction and Rating Data
| Conductor size No./mm | Conductor d.c. resistance at 20°C | Conductor a.c. resistance at 80°C | Reactance at 50 Hz (460 mm spacing) | Continuous current carrying capacity | Fault current rating kA for 1 sec.* | Everday working tensionf kN | Maximum working tension (50% MBL) kN | Minimum breaking load kN | Minimum bending radius mm | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Based on 30°C ambient | Based on 40°C ambient | |||||||||||||
| Ω/km | Ω/km | Ω/km | Still air | 1.0 m/s wind | 2.0 m/s wind | |||||||||
| Alloy 6201 | ||||||||||||||
| 7/2.75 | 0.799 | 0.988 | 0.331 | 125 | 210 | 235 | 110 | 185 | 210 | 3.5 | 1.51 | 5.8 | 11.6 | 200 |
| 7/3.75 | 0.43 | 0.532 | 0.312 | 180 | 300 | 345 | 160 | 270 | 310 | 6.4 | 2.82 | 10.9 | 21.7 | 245 |
| 7/4.75 | 0.268 | 0.331 | 0.297 | 245 | 410 | 465 | 220 | 365 | 415 | 10.3 | 4.52 | 17.4 | 34.8 | 290 |
| 19/3.50 | 0.183 | 0.227 | 0.281 | 315 | 515 | 595 | 280 | 460 | 530 | 15.2 | 6.67 | 25.7 | 51.3 | 340 |
| Alloy 1120 | ||||||||||||||
| 7/2.75 | 0.713 | 0.881 | 0.331 | 130 | 220 | 250 | 115 | 195 | 225 | 3.7 | 1.49 | 4.96 | 9.91 | 200 |
| 7/3.75 | 0.383 | 0.474 | 0.312 | 190 | 320 | 365 | 170 | 285 | 325 | 6.8 | 2.64 | 8.8 | 17.6 | 245 |
| 7/4.75 | 0.239 | 0.296 | 0.297 | 260 | 430 | 485 | 230 | 385 | 435 | 11 | 4.07 | 13.6 | 27.1 | 290 |
| 19/3.50 | 0.163 | 0.202 | 0.281 | 330 | 545 | 625 | 295 | 485 | 560 | 16.2 | 6.26 | 20.9 | 41.7 | 340 |
| TECHNICAL PERFORMANCE CHARACTERISTICS FOR COVERED CONDUCTORS (CCT) | ||||||||||||||
| Conductor size No./mm | Conductor d.c. resistance at 20°C | Conductor a.c. resistance at 80°C | Reactance at 50 Hz (460 mm spacing) | Continuous current carrying capacity | Fault current rating kA for 1 sec.* | Everday working tensionf kN | Maximum working tension (50% MBL) kN | Minimum breaking load kN | Minimum bending radius mm | |||||
| Based on 30°C ambient | Based on 40°C ambient | |||||||||||||
| Ω/km | Ω/km | Ω/km | Still air | 1.0 m/s wind | 2.0 m/s wind | |||||||||
| 11 kV Alloy 6201 | ||||||||||||||
| 7/3.75 | 0.43 | 0.532 | 0.312 | 185 | 295 | 330 | 165 | 265 | 295 | 6.4 | 2.82 | 10.9 | 21.7 | 285 |
| 7/4.75 | 0.268 | 0.331 | 0.297 | 245 | 390 | 440 | 220 | 350 | 395 | 10.3 | 4.52 | 17.4 | 34.8 | 330 |
| 19/3.50 | 0.183 | 0.227 | 0.281 | 315 | 500 | 560 | 280 | 445 | 500 | 15.2 | 6.67 | 25.7 | 51.3 | 380 |
| 22 kV Alloy 6201 | ||||||||||||||
| 7/3.75 | 0.43 | 0.532 | 0.312 | 185 | 285 | 315 | 165 | 255 | 280 | 6.4 | 2.82 | 10.9 | 21.7 | 350 |
| 7/4.75 | 0.268 | 0.331 | 0.297 | 245 | 375 | 420 | 220 | 335 | 375 | 10.3 | 4.52 | 17.4 | 34.8 | 395 |
| 19/3.50 | 0.183 | 0.227 | 0.281 | 315 | 475 | 530 | 280 | 425 | 475 | 15.2 | 6.67 | 25.7 | 51.3 | 445 |
| 33 kV Alloy 6201 | ||||||||||||||
| 7/3.75 | 0.43 | 0.532 | 0.312 | 185 | 270 | 295 | 165 | 240 | 265 | 6.4 | 2.82 | 10.9 | 21.7 | 425 |
| 7/4.75 | 0.268 | 0.331 | 0.297 | 245 | 360 | 400 | 220 | 320 | 355 | 10.3 | 4.52 | 17.4 | 34.8 | 470 |
| 19/3.50 | 0.183 | 0.227 | 0.281 | 315 | 455 | 505 | 280 | 405 | 450 | 15.2 | 6.67 | 25.7 | 51.3 | 520 |
| XLPE covered aerial cables Alloy 1120 conductors | ||||||||||||||
| Conductor size No./mm | Conductor d.c. resistance at 20°C | Conductor a.c. resistance at 80°C | Reactance at 50 Hz (460 mm spacing) | Continuous current carrying capacity | Fault current rating kA for 1 sec.* | Everday working tensionf kN | Maximum working tension (50% MBL) kN | Minimum breaking load kN | Minimum bending radius mm | |||||
| Based on 30°C ambient | Based on 40°C ambient | |||||||||||||
| Ω/km | Ω/km | Ω/km | Still air | 1.0 m/s wind | 2.0 m/s wind | |||||||||
| 11 kV Alloy 1120 | ||||||||||||||
| 7/2.75 | 0.713 | 0.881 | 0.331 | 130 | 215 | 240 | 115 | 190 | 215 | 3.7 | 1.49 | 4.96 | 9.9 | 230 |
| 7/3.75 | 0.383 | 0.474 | 0.312 | 190 | 315 | 345 | 170 | 280 | 310 | 6.8 | 2.64 | 8.8 | 17.6 | 285 |
| 7/4.75 | 0.239 | 0.296 | 0.297 | — | 415 | 470 | 230 | 370 | 420 | 11 | 4.07 | 13.6 | 27.1 | 330 |
| 19/3.50 | 0.163 | 0.202 | 0.281 | 330 | 525 | 595 | 295 | 470 | 530 | 16.2 | 6.26 | 20.9 | 41.7 | 380 |
| 22 kV Alloy 1120 | ||||||||||||||
| 7/2.75 | 0.713 | 0.881 | 0.331 | 135 | 205 | 225 | 120 | 185 | 200 | 3.7 | 1.49 | 4.96 | 9.9 | 300 |
| 7/3.75 | 0.383 | 0.474 | 0.312 | 190 | 295 | 330 | 170 | 265 | 295 | 6.8 | 2.64 | 8.8 | 17.6 | 350 |
| 7/4.75 | 0.239 | 0.296 | 0.297 | 260 | 400 | 440 | 230 | 355 | 395 | 11 | 4.07 | 13.6 | 27.1 | 395 |
| 19/3.50 | 0.163 | 0.202 | 0.281 | 330 | 505 | 560 | 295 | 450 | 500 | 16.2 | 6.26 | 20.9 | 41.7 | 445 |
| 33 kV Alloy 1120 | ||||||||||||||
| 7/2.75 | 0.713 | 0.881 | 0.331 | 135 | 195 | 215 | 120 | 175 | 190 | 3.7 | 1.49 | 4.96 | 9.9 | 385 |
| 7/3.75 | 0.383 | 0.474 | 0.312 | 195 | 285 | 315 | 175 | 255 | 280 | 6.8 | 2.64 | 8.8 | 17.6 | 425 |
| 7/4.75 | 0.239 | 0.296 | 0.297 | 260 | 380 | 420 | 230 | 340 | 375 | 11 | 4.07 | 13.6 | 27.1 | 470 |
| 19/3.50 | 0.163 | 0.202 | 0.281 | 330 | 480 | 530 | 295 | 430 | 475 | 16.2 | 6.26 | 20.9 | 41.7 | 520 |
| * Initial temperature 80°C, final temperature 210°C, constant K = 83.0 for alloy 6201 and 88.4 for alloy 1120. f 13% MBL fbr alloy 6201 and 15% MBL for alloy 1120. | ||||||||||||||
Request the Complete Data Sheet
From Production to Delivery
From raw material preparation to final shipmen, every stage is caretuly controled to ensure consistent conductor quality, reliable pertormance,and sae delivery. Our roduction,
inspection, packaging, and logistics processes are managed in accordance with applicable standards and project requirements.
Production
The specified 6201 or 1120 aluminium-alloy wires are stranded with longitudinal water-blocking material, after which the scheduled XLPE or XLPE/HDPE covering system is applied to the required dimensions.
Inspection
Inspection checks alloy and stranding, conductor resistance, water-blocking arrangement, covering thickness and surface, finished diameter and the mechanical or electrical tests required by AS/NZS 3675 and the purchase schedule.
Packaging
Reels protect the covering from abrasion and observe the bend and handling limits needed for conventional or spacer-system installation, with delivery lengths planned around the customer’s stringing sections.
Shipping
Drum identification records alloy family, conductor size, voltage, covering system, standard, length and production lot, keeping 6201 and 1120 variants clearly separated through transport and site storage.
Frequently Asked Questions
Is CCT suitable for a route with frequent vegetation exposure?
CCT is designed for covered-conductor applications where vegetation contact may occur, but contact duration, abrasion, wind and conductor temperature still matter. Share the route conditions and utility specification; we can quote the relevant construction while your project plan retains clearances, inspection and vegetation management.
Are 6201 and 1120 CCT conductors interchangeable?
No. They are separate aluminium-alloy conductor families with different technical properties and should not be treated as interchangeable. Selection should follow the applicable AS/NZS 3675 construction and the project’s electrical and mechanical requirements. We will keep the selected alloy group and its corresponding table clearly identified in the offer.
Is water blocking available for CCT covered conductor?
Yes. The 1120 aluminium-alloy construction is available with longitudinal water blocking. State the alloy type, working voltage, covering system and required water-penetration test in the enquiry so that the feature is included in the exact product description and inspection scope.
Can CCT be used in a spacer cable arrangement?
Yes, when the utility specifies the complete system. Send us the required messenger, spacer geometry, clamps, connectors and conductor data; we can organise the cable and related hardware enquiry together so the finished diameter and accessory interfaces are considered consistently.
How do XLPE and XLPE/HDPE covering options affect my order?
The selected system is linked to the voltage group, layer construction and finished dimensions shown for the selected product construction. Tell us which AS/NZS 3675 construction is required, and we will identify it explicitly in the offer and use its diameter when discussing fittings and reel handling.
What information is needed for a CCT quotation?
Please provide voltage, AS/NZS 3675 edition, 6201 or 1120 alloy, conductor size, covering system, water-blocking requirement, line arrangement, environment, quantity, reel lengths, accessories and test documents. We can use a utility schedule or drawing to organise any details that are still unclear.
Request for Free Consultation
Contact Information
Send us your cable requirements and our team will respond quickly with product recommendations, technical support and quotation details.
