Pit sprinklers located less than how many feet above the pit floor are exempt from causing shunt trip?

• A. 1'
• B. 2'
• C. 3'
• D. 4'

Answer: (A)

Shunt trips are designed to cut power to equipment when a sprinkler head releases water, coordinating fire protection with electrical safety. But not every sprinkler activation should automatically trip power. In pit areas, sprinklers that are extremely close to the pit floor are treated specially because their water discharge is unlikely to reach and affect electrical components in a way that would pose a hazard or cause a nuisance trip. Specifically, when a pit sprinkler is located less than one foot above the pit floor, it is exempt from causing a shunt trip. This small clearance means the water tends to stay at the bottom of the pit and does not create the conditions that would trigger the emergency power shutoff. Sprinklers higher up could reach electrical gear and potentially cause a trip, so they’re not exempt.