Black Insulated In-Line Splice 4 Set Screws

Overview: In-Line Splice with Four Set Screws

These connectors are designed for straight-through (in-line) conductor splicing, where wires enter from opposite ends of the block. The four-set-screw configuration provides enhanced clamping force, allowing each conductor to be secured with two screws instead of one—ideal for larger conductors, demanding mechanical environments, or applications requiring maximum reliability.

Key Features & Benefits

• Enhanced mechanical grip: Four set screws (two per conductor) deliver superior compression, making the connector highly secure in environments subject to vibration or mechanical stress.
• Durable black insulation: High-dielectric rubber or plastisol insulation provides impact resistance, abrasion resistance, and long-term stability in commercial and industrial settings.
• Professional dual-rated performance: Many connectors are CU/AL rated, allowing safe use with copper or aluminum conductors—ideal for mixed systems.
• 600-Volt rating: Designed for power distribution applications including feeders, branch circuits, troughs, and panelboard wiring.
• Factory-insulated design: Eliminates the need for taping or heat-shrink, saving time during installation and improving consistency across jobs.

Typical Applications

• Feeder splices in panelboards and switchgear where added mechanical reliability is required
• Splicing or extending large conductors in cable troughs, raceways, and junction enclosures
• Retrofit and service upgrades where existing conductors must be securely joined in-line
• Industrial or commercial installations requiring elevated security beyond standard 2-set-screw models

Note: These are insulated mechanical splice blocks—not ring, spade, fork, or device lugs. Designed for larger conductors and in-line power distribution connections, not for low-voltage control wiring.

How to Choose the Correct 4-Screw In-Line Splice Connector

1. Conductor size & material: Confirm copper, aluminum, or both. Check the supported wire gauge range and whether dual-rated performance is required.
2. Mechanical requirements: Select a 4-set-screw model when extra clamping strength or vibration resistance is needed.
3. Space & layout: Ensure an in-line style fits your routing — conductors enter opposite sides, not from a single entry point.
4. Voltage & listing: Choose models rated for 600 V systems and listed to appropriate UL/CSA standards.
5. Temperature & environment: Review insulation temperature limits and confirm compatibility with the install location.

Why Buy from Brand Name Lighting?

Brand Name Lighting offers a comprehensive selection of black insulated in-line splice connectors with four-screw configurations—sourced from trusted manufacturers and ready for fast shipping. If you don’t see the exact wire range or configuration you need, our team can help you locate it or recommend an appropriate alternative.

Select from the products above to equip your project with a durable, secure, and installation-ready in-line splice solution built for professional power distribution environments.