Why Choose the Partex PXL300-20 Copper Tube Ring Terminal?
The Partex PXL300-20 is a heavy-duty copper tube ring terminal designed for terminating compatible 300 mm² copper conductors onto electrical connection points using an M20 stud or bolt. Supplied in a convenient pack of 10 terminals, this large-section copper cable lug offers a practical solution for electrical contractors, industrial engineers, power distribution specialists and equipment manufacturers requiring secure crimped cable terminations.
Part of the Partex PXL copper tube terminal range, the PXL300-20 combines a tubular conductor barrel with a flat ring-type connection palm. The stripped copper conductor is inserted into the barrel and secured using an appropriately matched crimping tool and die. When correctly installed, the compressed barrel establishes mechanical conductor retention and electrical contact, while the ring palm provides a bolted connection to a compatible M20 fixing point.
The Partex PXL300-20 300 mm² M20 copper cable lug is particularly relevant to industrial power distribution, large electrical assemblies, heavy machinery and other applications involving substantial copper conductors. Its copper construction provides good electrical conductivity, while the enclosed ring fixing helps retain the terminal on the stud until the fastening hardware is removed. The complete connection must be assessed for electrical loading, mechanical strength, contact area and equipment compatibility before installation.
Key Advantages
- Designed for 300 mm² copper conductors, providing a termination option for compatible large-section power cables.
- M20 stud fixing for secure bolted connections to appropriately designed electrical equipment.
- Copper tube construction provides good electrical conductivity.
- Compression crimp termination delivers secure mechanical conductor retention when correctly installed.
- Ring-type connection remains captured by the fixing stud until the fastening hardware is removed.
- Pack of 10 terminals supports industrial installation projects, cable assembly and maintenance stockholding.
- Suitable for consideration in heavy-duty power distribution and industrial electrical equipment.
- Uninsulated construction allows inspection and the application of suitable supplementary insulation.
- Practical for new installations, electrical equipment refurbishment and replacement cable terminations.
- Combines large-conductor crimping and a substantial bolted connection in one terminal.
Key Features
- Partex PXL series copper tube ring terminal.
- Manufacturer part number: PXL300-20.
- Conductor cross-sectional area: 300 mm².
- Compatible stud size: M20.
- Nominal stud diameter: 20 mm.
- Terminal material: Copper.
- Connection style: Ring-type bolted terminal.
- Conductor termination: Compression crimp.
- Barrel construction: Tubular.
- Insulation: Uninsulated terminal.
- Pack quantity: 10 pieces.
- Intended for compatible copper conductors and appropriately rated connection points.
- Requires a suitable crimping tool and correctly matched die.
- Provides a permanent crimped conductor termination with a removable bolted fixing.
Technical Specifications
- Manufacturer: Partex
- Product series: PXL
- Model / SKU: PXL300-20
- Product type: Copper tube ring terminal / cable lug
- Conductor cross-sectional area: 300 mm²
- Compatible stud size: M20
- Nominal stud diameter: 20 mm
- Terminal material: Copper
- Terminal design: Tubular barrel with ring palm
- Termination method: Compression crimping
- Electrical connection: Bolted stud connection
- Insulation type: Uninsulated
- Pack size: 10 terminals
- Compatible conductor material: Copper, subject to cable construction and crimping compatibility
- Primary application: Termination of compatible 300 mm² copper conductors onto suitably rated M20 connection points
- Crimping equipment: Compatible tool and die required; confirm manufacturer recommendations
- Connection suitability: Verify electrical rating, contact area, mechanical strength and equipment compatibility
Heavy-Duty 300 mm² Copper Cable Terminations for Power Distribution
Copper tube ring terminals are commonly used in electrical installations where large conductors must be securely connected to power distribution equipment. The Partex PXL300-20 is designed for 300 mm² copper cable and an M20 stud connection, providing a crimp-and-bolt termination method for appropriately designed electrical assemblies.
The terminal's tubular copper barrel receives the prepared conductor. During installation, a suitable crimping tool compresses the barrel around the conductor using the correct die profile and compression procedure. This process creates mechanical retention and establishes electrical contact between the conductor and terminal when the components and tooling are correctly matched.
The M20 ring-type connection palm provides a substantial bolted fixing interface. Unlike an open-ended fork terminal, the ring terminal cannot be lifted away from the stud without removing the fastening hardware. This retained connection arrangement is useful where a secure mechanical attachment is required.
For a conductor as large as 300 mm², the correct crimping equipment is especially important. Suitable hydraulic or other manufacturer-approved compression tooling may be required to achieve the specified crimp profile. Installers should verify the correct die, crimping sequence, conductor insertion depth and number of compressions rather than assuming that any tool labelled for 300 mm² cable will be compatible.
The completed connection must also be protected against excessive mechanical stress. Large copper cables can impose significant forces on equipment terminals because of their weight and stiffness. Appropriate cable routing, bending clearance and mechanical support help minimise unwanted loading on the crimped terminal and the equipment connection point.
Choosing the Correct 300 mm² M20 Copper Ring Terminal
Selecting a suitable cable lug requires more than matching the conductor cross-sectional area. The Partex PXL300-20 is identified for 300 mm² copper conductors and M20 fixing studs, but conductor construction, barrel compatibility, ring palm dimensions and equipment connection requirements must also be considered.
Different ring terminals can accommodate the same conductor size while using different fixing hole diameters. Selecting the correct stud size helps ensure that the ring palm can be fitted securely to the intended electrical connection. However, the stud size alone does not establish the current-carrying capacity or suitability of the completed assembly.
For large power conductors, the terminal palm, stud, contact surface, fixing hardware and equipment terminal must all be suitable for the expected electrical load and operating conditions. The current-carrying capacity of a 300 mm² copper conductor must not be treated as proof that the bolted connection can safely carry the same current. The complete assembly should be assessed using the applicable manufacturer data and installation requirements.
The PXL300-20 is a copper terminal intended for compatible copper conductors. Aluminium conductors and mixed-metal connections require appropriately specified termination components. Where electrical insulation is required, suitable heat-shrink tubing, insulating sleeving or enclosure protection should be provided.
Installation Guidance for the Partex PXL300-20
Before installation, confirm that the cable is a compatible 300 mm² copper conductor and that the equipment connection is designed to accept an M20 ring terminal. The terminal's contact area, equipment electrical rating, fixing hardware and available installation clearance should all be checked.
The conductor should be stripped to the correct length using an appropriate cable preparation tool. Care must be taken to avoid damaging or removing conductor strands. The prepared conductor should be inserted fully into the terminal barrel before crimping.
A compatible crimping tool and die should be used in accordance with the manufacturer's instructions. For a large-section conductor, this may involve hydraulic compression equipment and a specified sequence of crimps. The completed crimp should be inspected for correct conductor insertion, complete compression and visible damage.
The ring palm should then be positioned over the M20 stud and secured using the equipment manufacturer's specified fastening arrangement. The bolted connection must be tightened to the recommended torque rather than an assumed value. Excessive tightening can damage the connection, while insufficient tightening may compromise electrical contact.
Suitable cable support should be provided to minimise mechanical loading on the termination. Because 300 mm² cables can be heavy and relatively stiff, cable bending radius, routing and support arrangements are particularly important. The completed installation should be inspected and tested in accordance with applicable electrical standards, equipment instructions and project specifications.
Typical Applications
- Industrial low-voltage power distribution equipment.
- Large electrical switchboards and distribution assemblies.
- Busbar connections with suitably rated M20 fixing points.
- Heavy industrial machinery and electrical equipment.
- Motor control and power distribution installations.
- Electrical equipment connections designed for large copper conductors.
- Industrial power supply and infrastructure projects.
- Equipment bonding and earthing connections where appropriately specified.
- Electrical equipment refurbishment and replacement cable terminations.
- Specialist cable assembly workshops and industrial maintenance operations.
