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Thursday, December 22, 2022
Question:
Hi CQD! Regarding the CQD on November 23. It was interesting to read that the 6" (min.) conductor required in a box can now be spliced or un-spliced. I agree with your interpretation of the change in 2023. Does this now mean that I could rough in a residence with NM cable and leave only a 1/2" of wire stubbed into the box with the intent to come back later and add a butt splice to get the required 6"?
I know this example is extreme, but with this change what is to stop someone from pushing the limits like the example given?
Regards, Eddie Guidry
A
Answer:
Eddie, thank you for your comments regarding the Code change in Section 300.14. It is clear you are very passionate about safety. During the 2023 revision process, there was support for the change as it clarified how Section 300.14 was already being interpreted by most AHJs. Section 300.14 never required the 6 inches of free conductor length to be free of splices, and the CMP recognized that there are times where splicing may be appropriate.
Additionally, there are other Code Sections that would allow an AHJ to prohibit installations that tried to abuse the clarified language. Here are some of the other Code Sections that AHJs use to prevent scenarios where the splices may cause a safety concern:
- Section 110.3 (A)-(C) Examination, Use and Listing of Equipment – This would ensure the proper equipment and listed products are going to be used to make a proper splice.
- Section 110.7 Wiring Integrity – Requires wiring installations are free from short circuits, ground faults, or any connections to ground other than as required or permitted elsewhere in this Code.
- Section 110.12(B) Mechanical Execution of Work - Requires equipment to be installed in a professional and skillful manner.
- Section 110.12(B) Integrity of Electrical Equipment.
- Section 110.14 Electrical Connections.
- Section 110.14(B) Splices