Q: How is the cable shield connected in an EMC cable gland?

EMC cable glands are designed to provide 360° contact with the cable shield. This is usually achieved with a spring or clamp solution that presses against the cable shield. This connection is crucial to ensure good EMC performance and to minimize electromagnetic interference in sensitive installations.

Question 1

When should you choose EMC cable glands?

Accepted Answer

EMC cable glands should be selected when shielded cables are used and the cable shield needs to be electrically connected to the enclosure.
They are crucial in installations where electromagnetic interference can affect function, safety or communication.

Common applications:

frequency converter and motor control
automation systems and control cabinets
sensitive measuring and control equipment
metal enclosures with grounding requirements

Question 2

When are EMC cable glands not the right choice?

Accepted Answer

EMC cable glands are not necessary in installations where cables are unshielded or where EMC requirements do not apply.

Avoid EMC glands when:

unshielded cables are used
installation is simple and interference-free
plastic enclosure used without grounding

Suitable options in these cases:

➡ Metal cable glands

➡ Plastic cable glands

Question 3

When is 360° screen connection needed?

Accepted Answer

360° shield connection is needed when the cable shield is to be connected around the entire circumference of the cable to provide effective attenuation of electromagnetic interference.
This is particularly important in installations with high EMC requirements, such as frequency converters, motor control or fast communication, where point-to-point connection does not provide sufficient shielding.

Question 4

What materials are used in EMC cable glands?

Accepted Answer

EMC cable glands are most often made of brass or stainless steel. The material and any surface treatment affect the corrosion protection and thus the product's lifespan, especially in industrial environments where moisture, chemicals or vibrations are present.

Question 5

Is metal screw connection sufficient without EMC function?

Accepted Answer

No, a standard metal gland without EMC function is not sufficient when the cable shield must be electrically connected to the enclosure.
Without a special EMC connector, there is no controlled shield connection, which can lead to poor EMC performance even if the screw connection is made of metal.

Question 6

Does incorrect mounting affect EMC performance?

Accepted Answer

Yes, incorrect assembly can significantly affect EMC performance. Insufficient contact with the cable shield or housing, incorrect tightening torque or dirty contact surfaces can impair the shield connection and thus reduce electromagnetic attenuation.

Question 7

How is the cable shield connected in an EMC cable gland?

Accepted Answer

EMC cable glands are designed to provide 360° contact with the cable shield. This is usually done with a spring or clamp solution that presses against the cable shield.

This connection is essential to ensure good EMC performance and to minimize electromagnetic interference in sensitive installations.

Question 8

How does assembly affect EMC function?

Accepted Answer

Correct assembly is essential for the EMC cable gland to function as intended. To achieve effective shielding, good electrical contact with the enclosure wall is required, so that interference can be conducted away via grounding. In installations with many cables or complex cabling, cable glands may instead be a more suitable solution.