National Electrical Installation Standards

Standards as High as Your Own

Thursday, October 15, 2020


Charlie Trout Flashbacks Question: 
Is there a restriction on the length of conduit which I can run before I am forced to have a fitting or a box? I say no, and I cannot find one. My partner says that you must have a fitting or box every 100 ft. I agree that it is a good idea, but not required.


Charlie Trout Flashbacks Answer: 
You are not required (forced) by the NEC to install a box or fitting to facilitate the installation of conductors in a raceway. You are correct in it is a good idea, and you are required to install pull points by good design. The NEC is not intended as a design specification and leaves this requirement up to the designer and the well-trained journeyman electrician. Requirements such as 300.18 prevent installing conductors before the run is complete, and subsections .24 and .26 in the raceway articles restrict the bend radius and the number of bends between pull points. NEC Reference: 300.18, 358.24, 358.26

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CHARLIE TROUT: Charles M. Trout, better known as Charlie, was a nationally known NEC® expert and author. He served on several NEC® technical committees and is past chairman of CMP-12. In 2006 Charlie was awarded the prestigious Coggeshall Award for outstanding contributions to the electrical contracting industry, codes and standards development, and technical training. Even though Charlie passed away in October of 2015, his work continues in spirit. NECA continues to maintain this question forum for its many subscribers in memory and recognition of all his significant contributions to making the NEC what it is today.

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IMPORTANT NOTICE: Unless the question requests a response based on a specific edition, all answers are based on the latest edition of NFPA 70® National Electrical Code®.

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