Aluminum Lay-in Lugs, Aluminum Lay-in Ground Lugs
Set-Screw Aluminum Lay-in Lugs for Terminal Boxes, Enclosures and Ground Bus Connections
Cable Glands India manufactures Aluminum Lay-in Lugs, also known as aluminum lay-in ground lugs or slotted set-screw lugs, machined from AL9CU aluminum alloy for direct conductor termination in terminal boxes, load centers, panelboards and ground bus applications. The open slot “lay-in” design allows the conductor to be laid directly into the lug body without stripping and threading it through a closed barrel, and secured with a hex or slotted set screw, at US$ 8.50/kilogram CIF/FOB Indian port. Supplied tin-plated as standard for aluminum and copper conductor compatibility, our lay-in lugs are manufactured to standard MCM/AWG conductor ranges for electrical OEMs, panel builders, EPC contractors and distributors worldwide.
Product Overview
Aluminum Lay-in Lugs are single or multi-conductor terminals with an open-top slot design that allows the stripped conductor end to be laid directly into the lug barrel rather than inserted through an enclosed tube, considerably simplifying field wiring in tight enclosures where conductor routing space is limited. Cable Glands India manufactures these lugs from AL9CU aluminum alloy, a high-strength aluminum-copper alloy specifically developed for dual aluminum/copper conductor compatibility in set-screw type connectors.
The set-screw mechanism, typically a hex socket or slotted head screw torqued to a specified in-lb value, bears directly on the conductor strands within the slot, providing a mechanically secure and electrically stable connection without requiring compression tooling, dies or crimping presses. This makes lay-in lugs particularly suited to field installation, retrofit wiring and applications where crimping tools are unavailable or impractical.
Aluminum lay-in ground lugs are widely used for bonding equipment grounding conductors to enclosures, terminal boxes, load centers and switchboard ground bus bars, and are manufactured in single-conductor and multi-conductor (2, 3 and 4 port) configurations to accommodate the range of AWG and MCM conductor sizes found in low-voltage power distribution wiring, from small AWG #14 control conductors up to 750 MCM feeder conductors.
Standard lay-in lugs are supplied tin-plated over the aluminum body, providing compatibility with both aluminum and copper conductors (dual-rated AL9CU construction) and reducing the bimetallic corrosion risk inherent when aluminum lugs terminate copper conductors, or vice versa. The tin plating also provides a stable, low-resistance contact surface that resists oxidation during storage and installation.
Mounting is typically via a single or dual mounting hole in the lug base, allowing direct bolting to ground bars, enclosure walls, DIN rail brackets or bus bar surfaces. Lug bodies are designed with adequate wire entry clearance and strain relief geometry to prevent conductor damage during tightening, and slot width is sized to accept the full stranded conductor cross-section without requiring the strands to be compressed or twisted excessively before insertion.
Cable Glands India supplies lay-in lugs in bulk OEM production quantities for panelboard and load center manufacturing, as well as smaller maintenance and retrofit order quantities for EPC contractors and electrical distributors, with tightening torque specifications and UL-reference dimensional data supplied on request.
Key Features
- AL9CU aluminum-copper alloy body, dual rated for aluminum and copper conductors
- Open lay-in slot design for tool-free conductor insertion without crimping
- Hex or slotted set-screw mechanical termination
- Tin-plated finish for corrosion resistance and stable contact resistance
- Single and multi-conductor (2, 3, 4-port) configurations available
- Priced at US$ 8.50/kilogram with OEM bulk pricing available
AL9CU Dual-Rated Alloy Construction
The AL9CU alloy used in our lay-in lugs is formulated to allow safe direct termination of both aluminum and copper conductors within the same lug body, eliminating the need for separate aluminum-only and copper-only lug part numbers in panel builder inventory and reducing the risk of using an incompatible lug on the wrong conductor type.
Tool-Free Lay-in Termination
The open slot geometry allows electricians to lay the stripped conductor directly into the lug body and tighten the set screw with a standard hex key or screwdriver, without the specialized compression dies, hydraulic or hand crimping tools required for closed-barrel compression lugs, significantly reducing installation time in panel and terminal box wiring.
Multi-Conductor Port Configurations
Lay-in lugs are available in 1, 2, 3 and 4-port configurations on a single mounting base, allowing multiple ground or neutral conductors to terminate at one bolted mounting point, reducing the number of discrete lugs and mounting holes required on a ground bar or enclosure panel.
Set Screw Torque Control
Each lug size is rated for a specific set-screw tightening torque range to ensure adequate contact pressure on the conductor strands without over-stressing or shearing the aluminum conductor; torque specifications are supplied with every shipment for quality control during field installation.
Terminal Box and Load Center Compatibility
Mounting hole spacing and lug body dimensions are manufactured to match standard terminal box, load center and panelboard ground bar layouts, allowing direct drop-in replacement of existing OEM lay-in lugs without modification to the enclosure.
Export Quality and Documentation
All lay-in lugs are supplied with mill test certificates, dimensional inspection reports and UL-reference conductor range data, packed for long-distance export shipment to electrical distributors and OEM panel manufacturers.
Technical Specifications
| Parameter | Specification |
|---|---|
| Material | AL9CU Aluminum-Copper Alloy |
| Conductor Range | AWG #14 to 750 MCM |
| Conductor Compatibility | Aluminum (STR/SOL) and Copper (dual rated) |
| Termination Type | Lay-in slot, hex or slotted set screw |
| Surface Finish | Tin Plated (standard) |
| Port Configuration | 1, 2, 3 and 4-conductor variants |
| Standard Reference | UL 486A-486B (dimensional/performance reference) |
| Price | US$ 8.50/kilogram, CIF/FOB Indian port |
Aluminum Alloy Grades
| Grade | Composition | Typical Use |
|---|---|---|
| AL9CU | Aluminum-Copper alloy, dual conductor rated | Lay-in and set-screw lugs |
| 6061-T6 | Al-Mg-Si structural alloy | Heavy-duty multi-port lug bodies |
International Equivalent Standards
| Country/Region | Standard Body | Equivalent Reference |
|---|---|---|
| USA | UL | UL 486A-486B |
| International | IEC | IEC 61238-1 |
| India | BIS | IS 8309 (reference, cable lugs) |
Product Types and Variants
| Type | Description |
|---|---|
| Single-Port Lay-in Lug | One conductor per mounting hole |
| Dual-Port Lay-in Lug | Two conductors on a single base |
| Multi-Port Ground Lug (3/4-port) | Multiple grounding conductors, single mounting point |
| Long Barrel Lay-in Lug | Extended slot length for large MCM conductors |
Applications in Industry
| Sector | Application |
|---|---|
| Electrical OEMs | Load center and panelboard ground lug assemblies |
| EPC / Construction | Terminal box and enclosure ground wiring |
| Renewable Energy | Solar combiner box and inverter grounding |
| Distributors | Maintenance and retrofit replacement lugs |
Manufacturing Process
Key process stages: (1) AL9CU alloy bar or rod stock cut to length; (2) hot forging or CNC machining of the lug body and lay-in slot; (3) drilling and tapping of the set-screw bore and mounting hole; (4) deburring and edge finishing; (5) tin electroplating; (6) set-screw assembly; (7) torque and dimensional testing; (8) packing with conductor range labelling.
Quality Standards and Certifications
- ISO 9001:2015 certified manufacturing facility
- Dimensional reference to UL 486A-486B conductor range tables
- 100% set-screw torque and fit verification on production batches
- Mill test certificates and dimensional inspection reports available on request
Why Choose Cable Glands India
- In-house forging, CNC machining and tin plating under one roof in Jamnagar, India
- Dual aluminum/copper rated AL9CU construction for universal panel builder use
- Competitive OEM bulk pricing at US$ 8.50/kilogram
- Single-port through multi-port configurations manufactured to any panel builder drawing
- Full export documentation and conductor range torque data supplied with every shipment
Frequently Asked Questions
What is an aluminum lay-in lug used for?
It terminates a conductor by laying it into an open slot and securing it with a set screw, commonly used for grounding conductors in terminal boxes, enclosures and load centers.
Can lay-in lugs be used with copper conductors?
Yes, AL9CU dual-rated construction allows the same lug to safely terminate either aluminum or copper conductors.
Do lay-in lugs require crimping tools?
No, the conductor is secured mechanically with a set screw; no compression dies or crimping tools are required.
What conductor sizes are supported?
Standard ranges cover AWG #14 through 750 MCM depending on the specific lug part number and port configuration.
What is the price of aluminum lay-in lugs?
Standard pricing is US$ 8.50/kilogram CIF/FOB Indian port, depending on port configuration and order quantity.
What standard governs lay-in lug dimensions?
UL 486A-486B is the common reference standard for conductor range and performance requirements of set-screw type connectors.
Are multi-conductor lay-in lugs available?
Yes, 2, 3 and 4-port configurations are available on a single mounting base.
What surface finish is standard?
Tin plating is standard for corrosion resistance and stable long-term contact resistance.
Can you match an OEM panel builder drawing?
Yes, Cable Glands India manufactures lay-in lugs to match existing OEM load center and panelboard drawings for drop-in replacement.
Do you provide torque specifications?
Yes, set-screw torque data is supplied with every shipment for quality control during field installation.
Equivalent Terms in Other Languages
| Language | Equivalent Terms |
|---|---|
| Spanish | Terminales de aluminio tipo ranura, Conector de puesta a tierra de aluminio, Terminal de tornillo prisionero |
| Russian | Алюминиевые накладные наконечники, Зажим заземления с винтом |
| French | Cosses a poser en aluminium, Connecteur de mise a la terre en aluminium, Cosse a vis de pression |
| Portuguese | Conectores de aluminio tipo encaixe, Terminal de aterramento de aluminio, Conector de parafuso prisioneiro |
| Italian | Capicorda in alluminio a innesto, Connettore di messa a terra in alluminio, Morsetto a vite di pressione |
Related Aluminum and Grounding Products
- Aluminum Terminal Bars, Aluminum Grounding Bars
- Aluminum Hotline Clamps
- Brass Bronze Square Earth Tape Clamps
- Aluminum Wedge Connectors, Aluminum Wedge Type Tap Connectors (related product)
Request a Quote
Cable Glands India supplies Aluminum Lay-in Lugs and Aluminum Lay-in Ground Lugs to electrical OEMs, EPC contractors, power utilities and distributors worldwide at US$ 8.50/kilogram. Submit your conductor size, port configuration and quantity for a formal export quotation. Email: sales@cableglandsindia.com | Phone: +91-22-43449300