| device constructed to minimize the risk of occurrence of arcs or sparks capable of creating an ignition hazard during conditions of normal operation Note 1 to entry: Normal operation is considered to exclude the removal or insertion of components with the circuit energized. Note 2 to entry: "nA" has been replaced by "ec" in IEC 60079-7, Explosive atmospheres – Part 7: Equipment protection by increased safety "e".
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