National Electrical Installation Standards

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Wednesday, December 28, 2016


Re: CQD answer published December, 20, 2016 -Class 2 Circuits

Per NEC(2017) 725.130(A) Exception No. 2, Class 2 circuits can be installed in same raceway with non power limited circuits under conditions stated.

David Green



Hey David thanks for your comment. That is true if the all conditions are complied with, which might not be easy to do. The power supply markings need to be removed from the Class 2 source, and Part II of Article 725 now applies, including overcurrent protection as stated in 725.43. Because the Class 2 circuit is reclassified as stated in 725.130(A) Exception No.2, Informational Note, everything from the power supply must meet these conditions. The submitter indicated this was a security system (likely for the house) so it didn't seem a viable solution, but could be possible.

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