Question

The maximum time delay between the flow of water from the machine room or hoistway sprinkler and the elevator shunt trip must not exceed ________?

1) 10 seconds
2) 30 seconds
3) 60 seconds
4) 90 seconds

Answer 1

3) 60 seconds, The maximum time delay for the elevator shunt trip activation in response to water flow from machine room or hoistway sprinklers is 30 seconds as per safety regulations.

Step-by-step explanation:

The question concerns the specification for the activation time of an elevator shunt trip in response to water flow from the machine room or hoistway sprinkler system. As per safety regulations, the maximum time delay allowed is typically 30 seconds. This requirement ensures that power is quickly removed from the elevator system to prevent a potential electrical fire when water is deployed from the sprinkler system.

The maximum time delay between the flow of water from the machine room or hoistway sprinkler and the elevator shunt trip must not exceed **60 seconds**. This safety measure is critical to ensure a swift response in the event of a fire.

The shunt trip mechanism is designed to disconnect power to the elevator in case of a fire emergency, preventing it from being used and facilitating safe evacuation. The 60-second limit aims to minimize delays, allowing the shunt trip to act promptly upon detecting water flow from the sprinkler system, contributing to effective fire suppression and building safety protocols.