National Electrical Installation Standards

Standards as High as Your Own

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Thursday, September 9, 2021

Question:

Hello CQD,

Are there uses not permitted for green unistrut? And where might I find unistrut sizing? 

Robert Roe

A

Answer:

Hello Robert,

Thanks for participating. Note that "green unistrut" may be a manufacturer's color choice but the color of the unistrut is not an NEC requirement. Article 384 contains requirements for strut-type channel raceways. Uses permitted are provided in 384.10 and uses not permitted are provided in Section 384.12. Section 384.22 provides requirements for number of conductors permitted to be installed in strut-type channel raceways. This section indicates that the number of conductors shall not exceed the percentages of conductor fill as indicated in Table 384.22. These maximum percentages of conductor fill are based on the size of the strut-type channel raceway.  

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