Which component should be used to protect cables passing through bulkhead holes?

• A. Grommets
• B. Sleeves
• C. Zip ties
• D. Heat shrink

Answer: (A)

Protecting cables passing through bulkhead holes from abrasion and edge damage is essential. A grommet provides a soft, smooth surface around the hole that the cable can move against, cushioning against vibration and preventing insulation wear where the edge of the hole could cut into the conductors. It also helps seal the opening against moisture and dust when needed. Sleeves protect the cable along its length but don’t shield the edge of the hole; heat shrink insulates and provides some strain relief at a termination, not the edge itself; zip ties secure the cable but can’t prevent edge abrasion. So, grommets are the appropriate choice for bulkhead protection.