The right copper lug should be selected by considering several technical and installation factors rather than choosing a product based only on cable size.
The first consideration is the conductor cross-sectional area.
The barrel of the lug must be compatible with the conductor being terminated. A properly matched lug allows the conductor to be inserted correctly into the barrel and crimped using the appropriate tooling.
Certa’s copper lug range covers conductor sizes from small electrical conductors through large power conductors, with the supplied range extending from 1.5 mm² to 1200 mm².
Selecting a lug based on the correct conductor size helps establish a consistent mechanical and electrical termination.
The equipment connection determines the required palm configuration.
One Hole copper lugs have a single mounting hole and are suitable for conventional bolted connections.
They are available in several configurations, including:
Two Hole copper lugs feature two mounting holes and can be used where the connection arrangement requires two fastening points.
Four Hole copper lugs provide a multi-hole palm arrangement for specific equipment and busbar connection requirements.
Therefore, the number and position of mounting holes should be checked before selecting the lug.
The barrel is the section into which the conductor is inserted.
Standard and long-barrel designs provide different termination configurations.
A One Hole Standard lug can be appropriate for conventional termination requirements, while a One Hole Long Barrel lug can be selected when the application requires an extended barrel configuration.
The barrel design should be considered together with the conductor size and required crimping arrangement.
The mounting hole must correspond to the fastening arrangement used on the electrical equipment.
A lug with an unsuitable palm hole size may not provide the required fit for the connection hardware.
For this reason, the equipment terminal or busbar connection should be checked before ordering the lug.
Copper is widely used for electrical cable termination because of its electrical conductivity.
Certa copper lugs are manufactured from E-Copper. The supplied product information also specifies a tin-plated finish for the copper tubular terminal range.
The material and surface finish should be considered when selecting a lug for a particular electrical installation.
Product standards provide an important reference when selecting electrical termination components.
The supplied Certa copper tubular terminal product information references IEC 61238-1:2003.
Where a project specifies particular standards, the selected product should be checked against the relevant project and installation requirements.
The same conductor size can be used in very different electrical systems.
Before selecting the lug, consider where it will be installed:
The connection design and available installation space can influence the appropriate lug configuration.
Several mistakes can be avoided by checking the technical requirements before purchasing.
Cable size is important, but it is not the only selection factor. The mounting hole and lug configuration must also match the equipment.
A correctly sized barrel does not automatically mean that the lug is suitable for the equipment connection.
Standard and long-barrel lugs have different designs. The required configuration should be confirmed before selection.
The lug and crimping system should be compatible. Appropriate tooling and installation procedures should be followed.
For larger electrical connections, dimensions such as barrel diameter, palm dimensions, hole diameter and overall length can be important.
Certa offers a broad copper lug range designed around different cable termination requirements, including:
The supplied technical information provides dimensional specifications across the copper lug range, allowing the appropriate configuration to be selected according to conductor size and connection requirements.
