| Definition: | electrical apparatus that contains both intrinsically safe circuits and non-intrinsically safe circuits and is constructed so that the non-intrinsically safe circuits cannot adversely affect the intrinsically safe circuits Note 1 to entry: Associated apparatus is either: - additionally protected by a Type of Protection suitable for use in the appropriate explosive atmosphere, or
- not protected by a Type of Protection suitable for use in the appropriate explosive atmosphere and, therefore, is not to be used within an explosive atmosphere.
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