Pre-insulated bimetallic lugs are specially designed for connecting low-voltage aerial bundled aluminum conductors (LV-ABC) to copper terminals, bus bars, transformers, and electrical equipment.
These lugs feature an aluminum barrel friction-welded to a copper palm, ensuring an excellent electrical transition while eliminating galvanic corrosion. A high-strength, UV-resistant insulation sheath combined with elastomeric sealing rings and pre-filled contact grease provides superior waterproofing and long-term reliability, even in harsh outdoor environments.
Clear markings on the insulation body simplify installation by indicating conductor size, stripping length, crimping sequence, and die reference, making these lugs ideal for utility, distribution, and renewable energy projects.
International Standard Compliance
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EN 50483-4 – Insulated connectors for LV aerial bundled cables
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NF C33-021 – French standard for pre-insulated connectors
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IEC 61238-1 – Electrical and mechanical performance of compression connectors
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RoHS Compliant
Construction & Materials
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Barrel: Aluminum ≥ 99.5% purity
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Palm: Copper ≥ 99.9% purity (round palm)
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Insulation Sheath: High-strength weather & UV-resistant polymer
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Sealing: Elastomeric ring with silicone grease
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Joining Method: Friction welding
Inspection & Testing
Installation Guide
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Select the correct TX pre-insulated lug according to conductor size.
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Strip the cable insulation to the length marked on the lug body.
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Insert the conductor fully into the aluminum barrel.
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Crimp over the insulation according to the marked sequence using the specified die.
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During crimping, electrical contact and sealing are achieved automatically.
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Bolt the copper palm to the copper terminal or bus bar securely.
Pre-insulated bimetallic lugs provide waterproof, corrosion-free aluminum-to-copper connections for LV ABC cable systems.
Technical Parameters
CPTA series are pre-insulated aluminium lugs for aluminium-to-aluminium connections, while CPTAU series are pre-insulated bimetallic lugs designed for aluminium conductors terminated on copper equipment.
Aluminium Lugs (CPTA Series)
| Item No. |
Cross Section (mm²) |
ΦA (mm) |
ΦB (mm) |
ΦD (mm) |
Color Code |
Crimping Die |
| CPTA 35 |
35 |
8.0 |
16.0 |
20 |
Red |
E173 |
| CPTA 50 |
50 |
9.0 |
16.0 |
20 |
Yellow |
E173 |
| CPTA 54 |
54 |
10.0 |
16.0 |
20 |
Black |
E173 |
| CPTA 70 |
70 |
10.5 |
16.0 |
20 |
White |
E173 |
| CPTA 95 D20 |
95 |
12.2 |
16.0 |
20 |
Grey |
E173 |
| CPTA 150-21 D20UK |
150 |
15.5 |
21.0 |
20 |
Violet |
E215 |
Pre-Insulated Bimetallic Lugs (CPTAU Series)
| Item No. |
Cross Section (mm²) |
ΦA (mm) |
ΦB (mm) |
ΦD (mm) |
Color Code |
Crimping Die |
| CPTAU 16 D16 |
16 |
5.5 |
10.5 |
16 |
Blue |
E140 |
| CPTAU 25 D16 |
25 |
6.5 |
10.5 |
16 |
Orange |
E173 |
| CPTAU 35 |
35 |
8.0 |
12.8 |
20 |
Red |
E173 |
| CPTAU 50 |
50 |
9.0 |
12.8 |
20 |
Yellow |
E173 |
| CPTAU 54 |
54 |
10.0 |
12.8 |
20 |
Black |
E173 |
| CPTAU 70 |
70 |
10.5 |
12.8 |
20 |
White |
E173 |
| CPTAU 95 |
95 |
12.2 |
12.8 |
20 |
Grey |
E173 |
| CPTAU 120 D25 |
120 |
14.2 |
12.8 |
25 |
Pink |
E215 |
| CPTAU 150 D25 |
150 |
15.5 |
12.8 |
25 |
Violet |
E215 |
FAQs
Q1: What are Telexc pre-insulated bimetallic lugs used for?
They are used to connect LV aluminum insulated cables to copper terminals or bus bars safely.
Q2: Is stripping of cable insulation required?
Yes, stripping is required according to the marked stripping length on the lug body.
Q3: Are these lugs waterproof?
Yes, they are tested at 6 kV under water and provide excellent water tightness.
Q4: How is corrosion prevented?
The friction-welded copper palm and aluminum barrel, combined with contact grease, prevent oxidation and galvanic corrosion.
Q5: Can these be used outdoors?
Yes, the insulation sheath is weather- and UV-resistant, making it ideal for outdoor use.
Our Services
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Rich experience in ODM & OEM production
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Excellent one-stop solution for telecom and power hardware
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High-quality precision casting and forging capabilities
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Factory-direct pricing with fast delivery
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Strict quality control and inspection at every stage
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Warm welcome to visit our factory for cooperation opportunities
About Us
Telexc is a high-tech enterprise specializing in the manufacturing of hardware equipment for the telecommunications and electric power sectors. With production and sales centers in Tianjin and Hebei, China, our products are successfully operating in over 30 countries and have been trusted in power systems for more than 20 years. We are an approved and certified supplier to major telecom companies worldwide and have earned excellent references from numerous utility departments. Our facilities are equipped with modern machinery, advanced testing equipment, and a skilled engineering team.
Telexc is certified under:
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ISO 9001 (Quality Management)
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ISO 14001 (Environmental Management)
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ISO 45001 (Occupational Health & Safety)
With innovation, reliability, and customer satisfaction at our core, Telexc continues to lead the way in transmission and telecommunication line hardware manufacturing.
Why Choose Telexc
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Superior Quality: Manufactured with precision to meet and exceed international performance and safety standards.
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Reliable Performance: Engineered for long-term durability, consistent electrical contact, and maintenance-free operation.
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Expert Support: Our technical team provides professional guidance to ensure correct selection and installation.
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Global Delivery: Efficient worldwide logistics ensure fast, reliable shipment to your location.
