Brass Neutral Links

Brass Neutral Links – Multi-Way Neutral Terminal Bars for Electrical Panels and Distribution Boards

Brass neutral links are multi-terminal electrical connectors used to interconnect neutral conductors in electrical distribution boards, consumer units, sub-distribution panels, and switchgear. Manufactured from high-quality free-machining brass (CW614N, C36000), brass neutral links provide a reliable, low-resistance neutral bus point with multiple screw-clamped ports for connecting incoming and outgoing neutral conductors. Used by electrical OEMs, EPC contractors, panel builders, and power utilities in the USA and globally, these components ensure safe, compliant neutral conductor management per NEC, IEC, and BS wiring regulations.

Product Overview

Brass and Copper Parts manufactures brass neutral links to BS 5775, IEC 60947-7-1, and customer-specific drawings. A neutral link consists of a solid brass body with multiple threaded terminal holes, each accepting a clamping screw for conductor insertion. The body is mounted on an insulated base (polyamide or polycarbonate) for panel installation. Brass neutral links are designed for use with copper conductors in AC single-phase and three-phase distribution systems, typically rated at 250V to 1000V depending on insulation and creepage design. They are distinct from neutral bars in having a removable link or bridging element that allows the neutral to be isolated for testing.

Product Types and Variants

By Number of Ways (Terminals)

• 2-Way Brass Neutral Link – Single incoming, single outgoing neutral; for small sub-distribution
• 4-Way Brass Neutral Link – 1 in + 3 out or 2+2 configuration
• 6-Way Brass Neutral Link – Standard for 6-way consumer units and small MCB boards
• 8-Way Brass Neutral Link – For 8-circuit distribution boards
• 12-Way Brass Neutral Link – For 12-way distribution boards, most common residential/commercial
• 16-Way Brass Neutral Link – For larger sub-distribution panels
• 24-Way Brass Neutral Link – For industrial MCB distribution boards
• Custom Multi-Way – Up to 36 ways and beyond per drawing

By Conductor Entry Configuration

• Single-Entry Neutral Links – All conductors enter from one side; compact panel design
• Double-Entry (Twin) Neutral Links – Conductors enter from both sides; for back-to-back panel wiring
• Staggered Entry Neutral Links – Alternating hole positions for high-density conductor routing

By Mounting Configuration

• DIN Rail Mounted Brass Neutral Links – Snap-fit onto 35mm DIN EN 50022 rail
• Panel (Screw) Mounted Neutral Links – Fixed mounting feet for direct panel base fixing
• Free-Standing (Chassis) Neutral Links – For custom panel fabrication without DIN rail

Key Features

• Free-machining brass body – excellent machinability, corrosion resistance, and conductivity
• Removable isolating link/bridge – allows neutral conductor isolation for testing (IT systems, TT systems)
• Multi-way configurations from 2 to 36 ways to match panel size requirements
• Accepts conductors from 1.5mm2 to 35mm2 depending on terminal size
• Insulated base rated 600V–1000V (UL/IEC); colour-coded blue for neutral identification
• Zinc-plated clamping screws for corrosion resistance
• Compact design for space-efficient panel installation
• Compatible with copper solid and stranded conductors; ferrule-terminated conductors

Technical Specifications

Raw Material Grades and International Equivalents

Applications in Industry

• Residential Electrical Panels: Neutral bar in consumer units, split-load distribution boards, and domestic circuit boards per NEC/BS 7671
• Commercial and Industrial MCB Boards: Neutral links in TPN (Three-Phase Neutral) distribution boards, sub-distribution panels in offices, factories, and commercial premises
• Electrical OEM Assembly: Pre-wired panel assemblies, busbar trunking sub-boards, motor control center neutral connections
• EPC Contractors: Neutral terminal bars in process plant distribution boards, instrumentation panels, and field junction boxes
• Renewable Energy Systems: Neutral links in solar PV AC distribution combiner boxes, battery inverter output panels, and EV charging distribution boards
• Data Centers and Telecom: Neutral terminal blocks in PDU (Power Distribution Units) and UPS output panels

Manufacturing Process

Brass neutral links at Brass and Copper Parts are CNC machined from free-machining brass bar (CW614N, ASTM B16) to achieve precise terminal hole dimensions, clamping screw thread accuracy, and body profile. Insulated bases are injection-moulded from UL 94 V-0 rated PA6.6. Assembly involves fitting the machined brass body onto the insulated base with retention features or screws, inserting clamping screws and the removable bridging link, and performing 100% electrical continuity and insulation resistance testing. Surface plating (nickel or tin) is applied before assembly when specified.

Quality Standards and Certifications

• IEC 60947-7-1 – Ancillary Equipment – Terminal Blocks for Copper Conductors
• BS 5775 – Neutral Links and Bars for Distribution Boards
• UL 508A – Industrial Control Panels
• EN 50022 – DIN Rail 35mm Mounting Compatibility
• UL 94 V-0 – Insulator Base Flammability Rating
• RoHS 2 Directive Compliant
• ISO 9001:2015 Quality Management System

Why Choose Brass and Copper Parts

• Full range from 2-way to 36-way, DIN rail and screw mount configurations
• CNC-machined brass bodies for precise terminal fit and reliable clamping
• UL 94 V-0 insulated bases – fire-safe panel installation
• Custom configurations, conductor size ranges, and current ratings to OEM drawings
• Bulk supply for panel builder and distribution board OEM programs
• Export-ready documentation and compliance certificates for USA and European markets

Frequently Asked Questions

What is a brass neutral link?

A brass neutral link is a multi-terminal connector block used in electrical distribution boards to connect all neutral conductors at a single bar. It consists of a brass body with multiple screw-clamped terminals, mounted on an insulated base, and includes a removable bridging link for neutral isolation during testing.

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

A neutral link has a removable or hinged bridging element that allows the neutral conductor to be isolated from the earth bar during insulation resistance testing. A neutral bar (or neutral bus) is a fixed connection bar without an isolation facility. Neutral links are used where TT or IT earthing systems require neutral isolation, or where testing accessibility is needed.

What conductor sizes do brass neutral links accept?

Depending on the model and clamping screw size, brass neutral links accept conductors from 1.5mm2 (small 2-4 way links with M4 screws) up to 35mm2 (large 12-24 way links with M8 screws). Specify required conductor range when ordering.

Are brass neutral links rated for three-phase systems?

Yes. Brass neutral links are used in single-phase and three-phase distribution boards as the neutral (N) terminal bar. They are rated for the neutral current of the system, sized to match the main incomer conductor cross-section.

What voltage rating do brass neutral links have?

Standard brass neutral links on PA6.6 insulated bases are rated at 600V (UL) or 1000V (IEC 60947-7-1), suitable for 240V, 415V, and 480V distribution systems.

Can the bridging link be removed for testing?

Yes. The removable brass bridge link or hinged link can be disconnected to isolate the neutral from earth for insulation resistance (IR) testing of the installation. This is a requirement under BS 7671 for certain earthing arrangements.

Are DIN rail mounting neutral links compatible with standard 35mm DIN rail?

Yes. Our DIN rail mounted brass neutral links are compatible with 35mm symmetric DIN rail per EN 50022 (DIN EN 50022), which is the universal standard for panel and control cabinet component mounting.

Do you supply nickel-plated brass neutral links?

Yes. Nickel-plated brass neutral links are available for improved tarnish and corrosion resistance, particularly for export and tropical climate applications.

What is the current rating of brass neutral links?

Current ratings depend on the body cross-section and number of ways. Typical ratings range from 100A (6-way, small conductor) to 400A (24-way, 35mm2 conductor). Provide system current requirements when specifying.

Do you offer custom-way and custom-current brass neutral links?

Yes. We manufacture custom neutral links up to 36 ways with custom conductor entry sizes, current ratings, and body dimensions per customer drawings or samples. OEM programs with custom branding are available.

Request a Quote

Need brass neutral links in standard or custom configurations? Brass and Copper Parts supplies multi-way brass neutral links to electrical OEMs, EPC contractors, panel builders, and distributors in the USA and worldwide. Contact us for specifications, pricing, and OEM supply programs.