Aluminium Cable Lugs & Al-Cu Bi-Metallic Lugs

Jamnagar Brass Components manufactures aluminium cable lugs and aluminium-copper (Al-Cu) bi-metallic cable lugs for medium voltage and low voltage power cable terminations in switchgear, distribution boards, transformers, and industrial machinery. Our lugs provide reliable, low-resistance connections between aluminium conductors and copper busbars or equipment terminals.

Types of Aluminium Cable Lugs We Manufacture

Our aluminium cable lug range includes standard aluminium compression lugs (barrel lugs) for aluminium power cable termination, bi-metallic (Al-Cu) lugs with an aluminium barrel for the cable and a copper palm for the connection, preventing galvanic corrosion at the equipment terminal interface, aluminium pin lugs for LV switchgear terminals, aluminium ring (eye) lugs for bolted connections to studs and terminals, and aluminium tension-clamp lugs for overhead distribution systems. Custom lug designs from buyer drawings are also available.

Materials and Construction

Our standard aluminium cable lugs are manufactured from EC-grade aluminium 1350 (99.5% Al) with a minimum conductivity of 61% IACS. Our bi-metallic lugs feature an aluminium barrel friction-welded or friction-stir welded to a copper (ETP C11000) palm, creating a joint without galvanic corrosion risk. The copper palm is tin-plated for oxidation resistance and improved contact. Lugs are available in cable sizes from 16 mm² to 1000 mm² and bolt hole sizes from M8 to M24.

Standards and Certifications

Our aluminium cable lugs are manufactured in accordance with IEC 61238-1 (compression and mechanical connectors for power cables), UL 486B (wire connectors for use with aluminium conductors), and BS EN 61238-1 for UK and European markets. All lugs are type-tested for contact resistance, pull-out force, and temperature rise. Our quality management system is certified to ISO 9001:2015.

Applications

Our aluminium cable lugs are used for MV/LV switchgear cable terminations, distribution transformer HV and LV connections, motor control centre (MCC) incoming cable connections, busbar chamber cable connections, underground cable joints and terminations, overhead power line connections, and renewable energy (solar, wind) power cable systems.

Why Choose Jamnagar Brass Components?

We supply aluminium cable lugs and bi-metallic lugs to electrical contractors, switchgear manufacturers, panel builders, and electrical wholesale distributors across the USA, Middle East, and UK. Our competitive India pricing, IEC 61238-1 compliance, and ISO 9001 certification make us a reliable supply partner for power cable accessories. Contact us for a quotation on your aluminium lug requirements.

Frequently Asked Questions — Aluminium Cable Lugs & Bi-Metallic Lugs

Q1: What is an aluminium cable lug?

An aluminium cable lug (also called an aluminium compression lug or aluminium terminal) is a mechanical connector used to terminate aluminium conductors (cables) at electrical equipment terminals, busbar connections, and distribution boards. It consists of a barrel (sleeve) that accepts the stripped cable conductor and a palm (tongue) with a fixing hole for bolting to equipment terminals. Available in pin-type, flat-palm, ring-terminal, and bi-metallic designs.

Q2: What is a bi-metallic (Al-Cu) cable lug and when is it used?

A bi-metallic (Al-Cu) cable lug has an aluminium barrel (for the aluminium cable) friction-welded or explosion-welded to a copper palm (for the copper terminal). It is used to connect aluminium cables to copper equipment terminals, preventing galvanic corrosion that would occur if an all-aluminium lug were bolted directly to copper busbars or copper terminal posts. Essential in MV/HV switchgear and transformer connections.

Q3: What cable sizes are available for aluminium cable lugs?

Aluminium cable lugs are available for cable conductor sizes from 16 mm² to 1000 mm² (and larger for HV applications). Standard barrel sizes cover 16, 25, 35, 50, 70, 95, 120, 150, 185, 240, 300, 400, 500, 630, and 800 mm² conductor cross-sections. Stud hole diameters of M6, M8, M10, M12, and M16 are standard. Custom sizes for non-standard cable and terminal configurations are available.

Q4: What standards apply to aluminium cable lugs?

Aluminium cable lugs must comply with IEC 61238-1 (compression and mechanical connectors for power cables) for type testing. BS 4579 covers compression fittings for aluminium conductors in the UK. DIN 46234 applies to the German/European market. For USA markets, UL 486A-486B covers wire connectors for aluminium and copper conductors. We supply lugs with type test certification per IEC 61238-1 on request.

Q5: How are aluminium compression lugs installed?

Aluminium compression lugs are installed using hydraulic crimping tools with matching die sets for the specific lug barrel size and cable cross-section. The cable is stripped to the correct length, inserted into the barrel, and crimped in the specified number of indentations per the manufacturer’s installation guide. Correct die selection is critical — under-crimping causes high contact resistance; over-crimping can damage the barrel.

Q6: What is the difference between aluminium and copper cable lugs?

Aluminium cable lugs are used for aluminium conductors (HV cables, overhead lines, transformer winding connections) while copper lugs are for copper conductors. Aluminium has higher resistance to oxide formation after stripping (aluminium oxide is highly resistive), requiring correct surface preparation and the use of inhibiting compound (contact grease) before crimping to prevent high-resistance joints. Copper lugs are simpler to install but more expensive for large cable sizes.

Q7: What industries use aluminium cable lugs?

Aluminium cable lugs are used in power generation (generator and transformer connections), transmission and distribution (HV/MV substations, switchgear), industrial plants (motor control centres, large drive connections), construction (building service main feeds), renewable energy (solar farm DC combiner boxes, wind turbine wiring), and railways (traction power distribution). The use of aluminium conductors is growing due to cost and weight advantages over copper.

Q8: What is the difference between a pin-type and flat-palm aluminium cable lug?

A pin-type (or pin-terminal) aluminium cable lug has a cylindrical pin at the terminal end instead of a flat palm, used for connecting into pin-type terminals of circuit breakers, contactors, and busbar couplers. A flat-palm (or ring) lug has a flat plate with a bolt hole for fastening to flat busbars or equipment terminals. Pin-type lugs are used in 4mm and 6mm pin terminal systems common in European LV switchgear.

Q9: Are bi-metallic lugs available for all cable sizes?

Yes. Bi-metallic Al-Cu lugs are available for cable sizes from 16 mm² to 630 mm², covering the full range of MV/HV cable termination requirements. The friction-welded or explosion-welded Al-Cu joint is designed to carry the full rated current without increased contact resistance, with type testing per IEC 61238-1 confirming thermal and mechanical performance. Custom barrel lengths and palm configurations are available for special requirements.

Q10: What is the lead time and minimum order for aluminium cable lugs?

Standard sizes (16–240 mm²) are typically in stock or available within 1–2 weeks. Non-standard sizes and bi-metallic configurations have 3–5 weeks lead time. Minimum order: 50 pieces for standard sizes; 100 pieces for bi-metallic or custom configurations. For project-specific large quantities (above 1,000 pieces), bulk pricing and dedicated production slots are available with 4–6 weeks lead time.