How many independent entrapment protection means are required per entrapment zone for vehicular gate operators?

• A. At least two
• B. One
• C. Three
• D. Four

Answer: (A)

Redundancy in entrapment protection is required for vehicular gate operators. For each entrapment zone, there must be two independent entrapment protection means so a single fault can’t leave the zone unprotected. Independent means the devices use different sensing methods or separate circuits, ensuring that a failure in one device doesn’t disable the other. For example, pairing a non-contact device like a photoelectric beam with a contact device such as a safety edge satisfies the requirement, since they rely on different principles and wiring. If there are multiple entrapment zones around a gate, each zone must have its own set of two independent means. This redundancy helps prevent entrapment injuries even when one device fails.