How well do you understand the requirements for panic hardware on electric rooms?

Question 1
According to the National Electric Code, which electric rooms need doors equipped with “panic bars, pressure plates, or other devices that are normally latched but open under simple pressure”?
A
Rooms housing large equipment – 600 Volts, nominal or less, 1200 amperes or more.
B
Rooms housing conductors and equipment used on circuits of over 600 Volts, nominal.
C
Transformer Vaults
D
All of the Above
Question 1 Explanation: 

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