| Definition: | subdivision of a Type of Protection, correlating with the Equipment Protection Level, that differentiates the likelihood of the equipment becoming a source of ignition Note 1 to entry: For example, Type of Protection intrinsic safety "i" is subdivided into Levels of Protection "ia", "ib", and "ic", which correlate with EPL Ga, EPL Gb, and EPL Gc (for explosive gas atmospheres).
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