Certified Hyperbaric Technologist Practice Test

Question: 1 / 625

According to NFPA 99, what is a limitation on portable battery-powered equipment inside a class A chamber?

No more than 48 watts

No more than 12 volts and 48 watts

The limitation on portable battery-powered equipment inside a class A hyperbaric chamber, as per NFPA 99, specifies that the equipment must not exceed 12 volts and 48 watts. This regulation is critical for maintaining safety within hyperbaric environments, where the combination of high pressure and potential ignition sources can pose significant risks. By limiting the voltage to 12 volts, the risk of electric shock and arcing is considerably reduced, as higher voltages could increase the danger of electrical hazards. Additionally, the wattage limitation ensures that the equipment does not generate excessive heat, which can also be a fire risk in an environment where oxygen levels may be elevated. This combination of specifications is designed to enhance safety and prevent incidents that could arise from using electrical devices in a high-pressure setting.

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No more than 120 volts

No more than 12 volts and nitrogen purging required

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