What is used to bond detachable metallic parts of equipment cabinets?

• A. Grounding jumper
• B. Bonding screw
• C. Isolation strap
• D. Shielding tape

Answer: (A)

Maintaining a continuous ground path between all metal parts of an equipment cabinet is essential for safety and EMI control. When parts like doors or panels detach, you need a flexible, removable conductor to reestablish the bond so every metal piece stays at the same earth potential. A grounding jumper provides that quick, portable connection, linking the cabinet frame and its detachable components so the bonding path remains intact even as parts are opened or removed.

Other choices don’t fit this use: a bonding screw is a fixed bond point and may not maintain continuity when a part is detached; an isolation strap is used to isolate equipment in specific testing or configuration scenarios; shielding tape is for shielding surfaces, not for creating a reliable bonding path between detachable parts.