Weidmuller Screw Clamp Technology (Cage Clamp)

Secure and Vibration Resistant Wiring Connection

The cage clamp design works well with nearly every size and type of wire and requires no special wire preparation. Just strip the wire and insert it into the block. Tightening the screw compresses the wire against the current bar and provides a secure and reliable connection for any application.

The Weidmuller cage clamp design achieves a high contact force between the conductor and the current bar. A torque of 6.02 in. lb (0.68 Nm) on the WDU 2.5 clamping yoke provides a contact force of 169 ft. lbs (750 Nm). Clamps with a low contact force will allow the conductor to move or be pulled out. In addition, contaminants can infiltrate the system and increase contact resistance.

The mechanical system in the Weidmuller cage clamp is made from hardened steel for superior strength and is electro-plated to inhibit corrosion.

• Insert the conductor in the ample space provided by the cage clamp.
• Tighten the screw until the contactor is contacting both the hardened steel of the cage clamp and the busbar. Notice the trapezoidal shape of the bottom portion of the cage clamp. This helps redirect the force of the clamping system into the wire (conductor) and then up into the current bar. This provides the maximum surface contact between the wire and the busbar.
• As the screw is further tightened, the top two folds of the cage clamp begin to deform. This forms a "self-locking" system that insures the wire stays in place

Three Steps to a Secure Connection Utilizing Weidmullers Screw Clamp Technology (Cage Clamp)

In addition to the features described above, all clamps and current bars have serrate surfaces to increase the force required to pull out installed conductors.

The Weidmuller screw clamp (cage clamp) design is well-proven in thousands of applications worldwide to provide tough, vibration-proof, and secure wiring connections.