How many branch circuits are required for car lighting, ventilation, and heating per elevator car?

How many branch circuits are required for car lighting, ventilation, and heating per elevator car?

• A. 1
• B. 2
• C. 3
• D. 4

Answer: (B)

The requirement for branch circuits in elevator cars is based on the need to ensure that car lighting, ventilation, and heating systems operate effectively and safely. For each elevator car, two separate branch circuits are typically required. One circuit is dedicated to the lighting system, which ensures that the interior of the elevator is well-lit for passenger safety and comfort. The second circuit is used for the ventilation and heating system, which is important for maintaining a comfortable environment, particularly in extreme weather conditions. This separation of circuits helps prevent overloads and enhances reliability, allowing for one system to operate independently of the other. Having two dedicated circuits can also contribute to easier troubleshooting and maintenance, isolating issues without disrupting both systems at once. Overall, this approach aligns with safety standards and ensures that all necessary functions for elevator operation are met without compromising the system's integrity.

The requirement for branch circuits in elevator cars is based on the need to ensure that car lighting, ventilation, and heating systems operate effectively and safely. For each elevator car, two separate branch circuits are typically required.

One circuit is dedicated to the lighting system, which ensures that the interior of the elevator is well-lit for passenger safety and comfort. The second circuit is used for the ventilation and heating system, which is important for maintaining a comfortable environment, particularly in extreme weather conditions. This separation of circuits helps prevent overloads and enhances reliability, allowing for one system to operate independently of the other.

Having two dedicated circuits can also contribute to easier troubleshooting and maintenance, isolating issues without disrupting both systems at once. Overall, this approach aligns with safety standards and ensures that all necessary functions for elevator operation are met without compromising the system's integrity.