The Last Step That Protects Every Connection

In terminal block wiring, stranded conductors left unprotected at the wire end are exposed to fraying, spreading, and short-circuit risk the moment they enter the terminal clamp. In multi-conductor connections where two wires share a single terminal point, that risk doubles. Paprsky Crewel Tube Pre-Insulating Terminals solve both problems at once, providing a tinned copper ferrule that consolidates two stranded conductors into a single, protected, insertion-ready end that fits cleanly into any terminal block clamp without fraying, spreading, or contact risk between adjacent connections.

What Are Crewel Tube Pre-Insulating Terminals?

Crewel tube pre-insulating terminals, also known as twin wire ferrules, are crimp-type end sleeves designed to terminate two conductors simultaneously into a single insulated ferrule body. The twin barrel accepts one conductor in each chamber, and when crimped, compresses both conductors into a unified, solid pin that inserts directly into a terminal block. The pre-insulated collar over the barrel provides electrical isolation between the conductor entry point and the terminal block face, preventing contact between adjacent ferrules in dense wiring layouts. This dual-conductor design is the standard solution for wiring configurations where two conductors must share a single terminal point cleanly, safely, and in compliance with installation standards.

Product Information

Paprsky Crewel Tube Pre-Insulating Terminals are rated to 150 degrees Celsius with an insulation voltage of 300V, and are available in thirteen variants covering conductor sizes from 2 x 0.5mm² through to 2 x 16.0mm². Pin lengths across the range run from 8mm up to 14mm, accommodating the insertion depth requirements of different terminal block types and sizes. Colour coding follows international standard identification across the full range, with White for 0.5mm², Blue for 0.75mm² and 2.5mm², Grey for 0.75mm² and 2.5mm², Red for 1.0mm², Black for 1.5mm², Orange and Grey for 4.0mm², Green and Yellow for 6.0mm², Brown, Green, and Red for 10.0mm², and Milky White and White for 16.0mm². This comprehensive size and colour coverage makes the range suitable for the full spectrum of control panel, industrial, and building wiring applications.

Key Features 

• Dual conductor design terminates two stranded wires simultaneously into a single clean, insertion-ready ferrule pin
• Rated to 150 degrees Celsius and 300V insulation voltage for reliable performance in demanding panel environments
• Pre-insulated collar prevents contact between adjacent ferrules in dense terminal block wiring layouts
• Tinned copper ferrule pin ensures low-resistance, corrosion-resistant contact at the terminal block connection point
• Thirteen size variants from 2 x 0.5mm² to 2 x 16.0mm² covering light signal wiring through to heavy power conductors
• International standard colour coding across all variants for compliant, organised, and auditable wiring installations
• Crimp design consolidates stranded conductors fully, eliminating fraying and strand spreading at the terminal entry point

Industrial and Professional Applications

• Electrical control panels and terminal blocks for terminating dual control and signal conductors into shared terminal points cleanly and safely
• Industrial automation and PLC wiring for connecting two conductors to a single terminal on input and output modules
• Building management and facility wiring for organising dual-conductor connections in distribution boards and junction boxes
• Switchgear and relay panels for securing two conductors per terminal point without strand contact or short-circuit risk
• Data, communication, and low-voltage wiring for clean dual-conductor terminations in structured and signal wiring assemblies

Every Dual-Conductor Connection Done Right

Where two conductors share one terminal, the ferrule that joins them determines whether that connection is safe, compliant, and long-lasting — or a risk waiting to surface during an inspection or under load. Paprsky Crewel Tube Pre-Insulating Terminals provide the standard answer to that requirement across thirteen size variants, international colour coding, and a 150-degree, 300V rated insulated body that protects every dual-conductor termination in the panel from the crimp to the clamp.

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CREWEL TUBE PRE-INSULATING TERMINAL