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Code Question Of The Day
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Saturday, May 17, 2008
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Subject: Refrigerator Receptacle
Why is it required to use a single receptacle when using Exception No. 2 to 210.52(B)(1)? The handbook explanation does not cover this and is confusing.
Ed Buttran
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code question and answer:
Thursday, May 15, 2008
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Subject: Securing NM Cable
Hey Charlie, the explanation in the 2008 NEC Handbook under 334.30(A) states in part – Where the cable terminates at a nonmetallic outlet box that does not contain a cable clamping device, the cable may be secured (fastened in place) within 8 in. of the outlet box, according to 314.17(C), Exception – Does this mean that at any nonmetallic box without a cable clamping means I can use the provisions of 314.17(C)?
Robert T.
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Answer:
Hey yourself Robert, I agree the wording of the explanation does imply that at any nonmetallic outlet box without clamping means you are permitted to secure the cable within 8 in. of the outlet box and securing of the cable to the box is not required. However that is not what it means. The last sentence of 314.17(C) says – In all instances, all permitted wiring methods shall be secured to the boxes-. This is followed by the exception for single gang boxes not larger than 2¼ x 4 mounted in walls or ceilings where securing to the box is not required if the cable is fastened within 8 in. of the box. Don’t overlook the mounted in walls or ceilings part.
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Section: 334.30(A), 314.17(C)
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Source: Charlie Trout
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ANSWERS: Answers are the author’s opinions and do not represent formal interpretations of the National Electrical Code.
All answers are based on the latest edition of the NEC, unless the question requests a response based on a specific edition.
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ABOUT THE AUTHOR: Charlie Trout is a nationally-known NEC expert and author. He served on three different National Electrical Code-Making Panels and is past chairman of CMP-12. He is also a member of the NECA Codes & Standards Committee. In 2006 Charlie Trout won the prestigious Coggeshall Award, given to recognize outstanding contributions to the electrical contracting industry in the technical and training area.
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