electrical apparatus which contains both energy-limited and non-energy-limited circuits and is constructed so that the non-energy-limited circuits cannot adversely affect the energy-limited circuits
NOTE – Associated energy-limited apparatus may be either:
a)electrical apparatus which has an alternative method of protection included in IEC 60079-15 for use in the appropriate explosive gas atmosphere [nL];
b)electrical apparatus which has an alternative type of protection listed in IEC 60079 0 for use in the appropriate explosive gas atmosphere [nL];
c)electrical apparatus not so protected and which therefore shall not be used within an explosive gas atmosphere, for example, a recorder which is not of itself in an explosive gas atmosphere but is connected to a thermocouple situated within an explosive gas atmosphere where only the recorder input circuit is energy-limited [Ex nL].
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