RBC4 Partex Butt Connectors, I/D 4mm, Red, pack 100

Why Choose the Partex RBC4 Red Insulated Butt Connector?

The Partex RBC4 Red Insulated Butt Connector is a pre-insulated electrical crimp connector designed to join two compatible copper conductors securely in an end-to-end connection. Featuring a 4 mm nominal insulated connector diameter, red PVC insulation and a copper crimp sleeve, the RBC4 provides a practical solution for extending, repairing and joining electrical wires in professional electrical installations.

Designed for 0.5–1.5 mm² stranded copper conductors (22–16 AWG), the Partex RBC4 allows two prepared wire ends to be inserted from opposite sides of the connector and secured using a suitable crimping tool. Its copper connection sleeve provides the electrical joining point, while the surrounding red PVC insulation helps protect the completed splice against accidental contact with adjacent conductive components.

Supplied in a convenient pack of 100 connectors, the Partex RBC4 is suitable for electrical contractors, control panel builders, maintenance engineers and equipment manufacturers. Its compact, straight-through design makes it particularly useful where small electrical conductors need to be joined without using a separate terminal block or screw connection.

Key Advantages

• Secure end-to-end wire joining: Designed to connect two compatible copper conductors using a permanent crimped splice.
• Red colour-coded insulation: Identifies the connector as suitable for the 0.5–1.5 mm² conductor range.
• PVC insulated construction: Helps protect the electrical connection against accidental contact and short circuits.
• Copper crimp sleeve: Provides an electrically conductive connection between correctly prepared wire ends.
• No soldering required: Allows efficient wire joining using compatible crimping equipment.
• Compact straight-through design: Suitable for joining wires within control panels, electrical assemblies and equipment wiring.
• Professional crimp termination: Supports repeatable electrical connections when installed using the correct tool and die.
• Useful for maintenance and repairs: Provides a practical solution for extending or replacing sections of compatible wiring.
• Pack of 100: Convenient for electrical installation projects, workshop stock and ongoing maintenance requirements.

Key Features

• Partex RBC insulated butt connector series.
• RBC4 manufacturer part number.
• Red PVC insulation for straightforward conductor size identification.
• 4 mm nominal insulated connector diameter.
• 0.5–1.5 mm² conductor compatibility.
• 22–16 AWG equivalent wire size range.
• Copper internal crimp sleeve for joining copper wires.
• Straight-through butt splice configuration.
• Pre-insulated design for electrical connection protection.
• Designed for installation using compatible insulated-terminal crimping tools.
• 100 red insulated butt connectors per pack.

Reliable PVC Insulated Crimp Connections for Electrical Wiring

Butt connectors provide a straightforward method of joining two electrical wires without a separate screw terminal or soldered joint. The Partex RBC4 uses an internal copper sleeve to connect the prepared conductor ends. Each wire is inserted into the appropriate side of the connector and crimped using the correct tooling, forming a mechanically retained and electrically conductive splice.

The connector's red PVC insulation provides an insulating covering around the joint and helps distinguish it from other colour-coded connector sizes. In the standard insulated crimp terminal colour system, red identifies the 0.5–1.5 mm² conductor range, while blue and yellow connectors are intended for larger conductor sizes. Selecting the correct colour and conductor range is important for achieving a suitable crimp connection.

The 4 mm nominal diameter refers to the insulated connector size used to identify this RBC4 variant. It should not be confused with a 4 mm² conductor rating. The RBC4 is intended for 0.5–1.5 mm² copper wires, making it suitable for smaller electrical wiring rather than large power cable terminations.

For correct installation, the conductor insulation should be stripped to the appropriate length without damaging the copper strands. The prepared wire ends are inserted into opposite sides of the connector and crimped using a suitable tool with the correct red insulated-terminal die. Both crimps should be inspected for mechanical security, and the completed splice should be checked for electrical suitability before the circuit is returned to service.

Although the PVC sleeve provides insulation around the splice, the RBC4 is not an adhesive-lined heat-shrink connector. Where an installation requires additional moisture protection, environmental sealing or enhanced strain relief, the appropriate connector and protective arrangement should be selected for those conditions.

Typical Applications

• Joining small stranded copper wires in electrical control panels.
• Extending compatible electrical equipment wiring.
• Industrial control cabinet wiring and maintenance.
• Electrical switchgear auxiliary and control circuit connections.
• Electrical equipment manufacturing and assembly.
• Repairing compatible wiring within suitably protected installations.
• Commercial electrical installation and maintenance projects.
• Connecting compatible wires in machinery control circuits.
• Workshop electrical wiring and cable assembly.
• Professional electrical contractor maintenance stock.