Cable laid grommets should have a minimum circumferential length of how many times their body diameter?

• A. 64 times
• B. 96 times
• C. 120 times
• D. 80 times

Answer: (B)

Maintaining enough wrap around a cable in a grommet prevents damaging bends and pinch points. When a cable passes through a grommet, a larger circumferential length distributes bending stress over a wider area, reducing the risk of insulation damage, wear, and future movement fatigue.

The recommended minimum of 96 times the cable’s body diameter gives a generous bend radius and clearance, helping the conductor and insulation endure movement, temperature changes, and vibration without sharp compression at the grommet edge. Shorter values would create tighter bends and higher stress, increasing the chance of damage, while a value like 120 times is more than necessary for typical installations and isn’t as practical.