What are maximum intrinsically safe circuit levels of AC and DC volts and amps?

The maximum intrinsically safe circuit levels vary based on the specific application and certification standards, but generally, for AC circuits, the limit is around 10 volts and 0.5 amps, while for DC circuits, it can be up to 28 volts and 0.1 amps. These limits are designed to prevent ignition in hazardous areas by ensuring that the energy in the circuit is below the level that could cause arcing or sparking. Always refer to relevant standards, such as those from the National Fire Protection Association (NFPA) or International Electrotechnical Commission (IEC), for precise requirements.