Aluminum Terminal Bars, Aluminum Grounding Bars

Extruded and Fabricated Aluminum Ground Bars for Earthing, Bonding and Panel Wiring Systems

Cable Glands India manufactures Aluminum Terminal Bars and Aluminum Grounding Bars machined and fabricated from extruded aluminum bar stock (6063, 6061 and 1350 EC grade) for earthing systems, switchgear neutral links, panel wiring terminals, solar array grounding and substation bonding grids. Bars are supplied pre-drilled to NEMA and custom hole patterns, tin-plated or bare, in single-row and multi-row circuit configurations, at US$ 8.50/kilogram CIF/FOB Indian port. As an ISO 9001:2015 certified exporter based in Jamnagar, India, we supply electrical OEMs, EPC contractors, power utilities and distributors worldwide with custom-length, custom-drilled aluminum bars matching IS 3043, IEEE 837 and UL 467 reference dimensions.

Product Overview

Aluminum Terminal Bars, also referred to as aluminum ground bars, aluminum bus bars or aluminum neutral links, are rectangular or flat-section conductors machined from high-conductivity aluminum extrusions and used to terminate multiple conductors at a single common bonding or neutral point. Cable Glands India fabricates these bars from 6063-T6 and 6061-T6 structural aluminum alloys as well as 1350 EC (Electrical Conductor) grade aluminum for applications demanding maximum conductivity. Standard cross-sections range from 6mm x 25mm to 12mm x 100mm, with lengths from 100mm terminal blocks up to 3-metre switchgear ground bus runs, cut, drilled and finished to drawing.

Aluminum Grounding Bars serve as the primary bonding point in electrical panels, switchgear line-ups, telecom equipment rooms, solar PV combiner boxes and substation control buildings, where multiple ground conductors, equipment grounds and structural steel bonds converge on a single low-impedance bar. Hole patterns are punched or CNC drilled to NEMA two-hole and four-hole lug spacing, or custom spacing supplied by the customer drawing, allowing direct bolted termination of compression lugs, mechanical lugs and cable shoes without secondary adapters.

Surface finish options include mill-finish bare aluminum, electro-tin plating and chromate conversion coating, each selected according to the connecting hardware and corrosion environment. Tin plating is specified where aluminum bars interface with copper lugs or tinned copper conductors, since the tin layer reduces bimetallic corrosion risk and maintains stable contact resistance across thermal cycling. Chromate conversion coating is used where bars remain uninsulated in outdoor or coastal substations, providing a conductive oxide-inhibiting layer prior to bolted connection.

Aluminum Terminal Bars are frequently supplied with mounting standoff insulators, stand-off brackets or DIN rail adapters for direct panel installation, and can be pre-assembled with brass or stainless-steel mounting hardware, insulating barriers between phases, and identification labels or engraved phase markings as required by panel builders. Bars for outdoor substation ground grids are typically supplied bare or hot-dip galvanized-compatible with additional corrosion allowance in thickness.

Because aluminum conductors expand and contract at a different rate than copper and steel hardware, Cable Glands India controls hole tolerances, uses Belleville spring washers on request, and recommends anti-oxidant joint compound at every bolted termination to preserve long-term contact pressure and prevent the formation of high-resistance aluminum oxide film at the interface.

Typical production quantities range from small prototype batches of 10-50 pieces for panel builders to container-load export orders of several tonnes for utility ground-grid replacement programs, with custom drilling, slotting, notching and bending available on all standard and non-standard sizes.

Key Features

• Machined from 6063-T6, 6061-T6 and 1350 EC high-conductivity aluminum bar and extrusion stock
• Custom length, thickness and hole-pattern drilling to NEMA and customer drawings
• Bare, tin-plated or chromate-conversion-coated surface finish options
• Suitable for bolted termination of mechanical lugs, compression lugs and cable shoes
• Priced at US$ 8.50/kilogram with volume-based export pricing available
• Supplied with insulated stand-offs, mounting brackets and identification labelling on request

High-Conductivity Aluminum Alloys

Our aluminum terminal bars are produced from 1350 EC grade aluminum where maximum electrical conductivity is the design priority, and from 6063-T6 or 6061-T6 structural alloys where mechanical strength, machinability and extrusion flexibility are required. 1350 EC aluminum offers a minimum conductivity of 61% IACS, comparable to many bus bar applications, while 6063 and 6061 alloys provide the strength needed for drilled, slotted and bolted ground bar assemblies subject to repeated torque cycles during field wiring and maintenance.

NEMA and Custom Hole Drilling

Terminal bars and ground bars are punched or CNC drilled to NEMA two-hole and four-hole lug pad spacing as standard, with custom hole diameter, pitch and edge distance available to match any lug, busbar or cable shoe drawing supplied by the customer. Countersunk holes, slotted holes and oversized clearance holes are all available for OEM panel assemblies with tight tolerance stack-ups.

Bimetallic Corrosion Control

Aluminum-to-copper bolted joints are inherently prone to galvanic corrosion in humid or coastal environments. Cable Glands India addresses this with tin-plated aluminum bar options, recommended NO-OX-ID or equivalent joint compound, and Belleville washer stacks that maintain constant clamping pressure despite differential thermal expansion between aluminum bars and copper or brass hardware.

Panel and Switchgear Integration

Ground bars and neutral bars are supplied with drilled mounting slots, insulated stand-off posts and DIN rail clip adapters so panel builders can integrate them directly into low-voltage switchboards, motor control centres, distribution boards and telecom equipment racks without additional fabrication at the assembly line.

Export Packaging and Documentation

All aluminum bar shipments are packed in moisture-resistant wrapping with edge protection, accompanied by mill test certificates, dimensional inspection reports and commercial documentation required for customs clearance in the Middle East, Africa, Europe, Southeast Asia and North America.

Custom Fabrication Support

Beyond standard ground bars, Cable Glands India fabricates bent, notched, stepped and multi-tier aluminum bar assemblies for non-standard switchgear retrofit projects, working directly from customer CAD drawings or physical samples to reverse-engineer replacement parts.

Technical Specifications

Aluminum Raw Material Grades

International Equivalent Standards

Product Types and Variants

Applications in Industry

Manufacturing Process

Key process stages: (1) incoming alloy verification against mill certificates; (2) precision saw-cutting to length; (3) CNC drilling, punching or slotting to drawing; (4) edge deburring and chamfering; (5) surface preparation, degreasing and etching for plated variants; (6) electro-tin plating or chromate conversion coating; (7) dimensional and conductivity inspection; (8) labelling, moisture-resistant packing and export documentation.

Production begins with extruded or hot-rolled aluminum bar stock in the specified alloy, sawn to length on precision cut-off saws. Bars are then CNC drilled or punched to the required hole pattern, deburred and edge-chamfered to remove sharp corners that could damage cable insulation during installation. Bars requiring plating are degreased, etched and electro-tin plated or chromate conversion coated in a controlled finishing line, followed by dimensional inspection, conductivity spot-checks and visual surface inspection before packing.

Quality Standards and Certifications

Every batch of aluminum bar stock is verified against mill certification for alloy composition and temper before it enters production, ensuring the delivered ground bars meet the conductivity and mechanical strength values specified on the customer purchase order. In-process checks include hole diameter and pitch verification using go/no-go gauges, edge deburring inspection, and plating thickness measurement on tin-plated bars using a coating thickness gauge, so that every piece leaving the facility matches the approved sample or drawing within stated tolerance.

For utility and EPC customers requiring third-party inspection, Cable Glands India accommodates pre-shipment inspection by SGS, Bureau Veritas, Intertek or the customer’s own nominated inspection agency, including witnessed dimensional checks, material traceability review and packing verification prior to container loading.

• ISO 9001:2015 certified manufacturing facility
• Dimensional and hole-pattern compliance with IS 3043 and IEEE 837 reference drawings
• RoHS-compliant plating processes
• Mill test certificates issued with every export shipment
• 100% dimensional inspection prior to dispatch

Why Choose Cable Glands India

• Direct manufacturer based in Jamnagar, India, with in-house extrusion cutting, CNC drilling and plating
• Custom drilling and fabrication to customer CAD drawings, no fixed minimum order quantity restrictions
• Competitive export pricing at US$ 8.50/kilogram with consolidated shipping support
• Established export experience to the Middle East, Africa, Europe, Southeast Asia and the Americas
• Full documentation package including mill certificates and dimensional reports

Frequently Asked Questions

What alloy is used for aluminum ground bars?

Cable Glands India uses 6063-T6, 6061-T6 and 1350 EC grade aluminum depending on whether the application prioritises mechanical strength or maximum electrical conductivity.

Can aluminum terminal bars be drilled to a custom hole pattern?

Yes, all bars are CNC drilled or punched to customer-supplied drawings, including NEMA standard patterns and fully custom hole spacing.

Is tin plating necessary for aluminum ground bars?

Tin plating is recommended wherever aluminum bars are bolted directly to copper or brass lugs, to reduce bimetallic corrosion and maintain stable long-term contact resistance.

What is the price of aluminum terminal bars?

Standard pricing is US$ 8.50/kilogram CIF/FOB Indian port; final pricing depends on thickness, drilling complexity and order quantity.

What standards apply to aluminum grounding bars?

Dimensional and application references include IS 3043, IEEE 837 and UL 467, along with IEC 62561 for lightning protection system components.

Can bars be supplied with insulated mounting stand-offs?

Yes, insulated stand-off posts, mounting brackets and DIN rail adapters can be pre-assembled to the bar prior to shipment.

What is the minimum order quantity?

Cable Glands India accepts both small prototype batches and container-load export orders; there is no fixed minimum order quantity.

Do you supply mill test certificates?

Yes, mill test certificates and dimensional inspection reports are issued with every shipment.

What is the difference between a ground bar and a neutral link?

A ground bar bonds multiple protective earth conductors to a common reference point, while a neutral link terminates multiple neutral conductors in a distribution board; both are fabricated from the same aluminum bar stock with different hole spacing and labelling.

Can you match an existing OEM ground bar drawing?

Yes, Cable Glands India regularly reverse-engineers and fabricates replacement ground bars from customer drawings or physical samples for retrofit and maintenance orders.

Equivalent Terms in Other Languages

Related Aluminum and Grounding Products

• Aluminum Parts, Aluminum Pressed Parts
• Brass Bronze Square Earth Tape Clamps
• Bronze Ground Rod Clamps – Acorn Clamps
• Bronze Grounding Connectors for Transformers
• Aluminum Lay-in Lugs, Aluminum Lay-in Ground Lugs (related product)
• Aluminum Hotline Clamps (related product)

Request a Quote

Cable Glands India supplies Aluminum Terminal Bars and Aluminum Grounding Bars to electrical OEMs, EPC contractors, power utilities and distributors worldwide at US$ 8.50/kilogram. Submit your drilling drawing, quantity and destination port for a formal export quotation, or contact our engineering team for custom bar fabrication. Email: sales@cableglandsindia.com | Phone: +91-22-43449300