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What is the power limitation for communication systems inside a hyperbaric chamber as specified by NFPA 99?
No more than 28 volts
No more than 12 volts
No more than 50 watts
No more than 0.5 watts
The correct answer is: No more than 28 volts
The specification regarding the power limitation for communication systems inside a hyperbaric chamber, as outlined by NFPA 99, indicates that the system must not exceed 28 volts. This limit is significant due to several safety considerations in the hyperbaric environment, where increased pressure can elevate the risk of electrical hazards. Maintaining a maximum voltage of 28 volts helps to reduce the likelihood of electric shock, ensures equipment compatibility, and diminishes the risk of sparking, which could potentially ignite flammable materials or gases present in a chamber. Additionally, this measure aligns with the general trend in safety standards to minimize electrical hazards in confined or high-pressure environments. While other voltage levels and power limitations exist for different devices and systems, the specific limit of 28 volts for communication systems has been established to ensure the greatest safety margin for patients and staff working within the hyperbaric conditions.