Two "hot" Wires In One Romex? - Electrical - Page 2 - DIY Chatroom Home Improvement Forum
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Old 07-29-2010, 02:01 PM   #16
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Quote:
Originally Posted by kboothe View Post
Thanks!

one last question, you wrote:
You can't have current running down one cable and coming back thru a second, whether it be a hot and neutral or a switch leg.

Why is this not allowed (current running from one cable and back a different cable)?

NEC 300.3 Conductors
(B) Conductors of the Same Circuit. All conductors of the same circuit and, where used, the grounded conductor and all equipment grounding conductors and bonding conductors shall be contained within the same raceway, auxiliary gutter, cable tray, cablebus assembly, trench, cable, or cord, unless otherwise permitted in accordance with 300.3(B)(1) through (4).
Its the fundamental requirement of this section that single conductors shall be grouped together to mitigate the parasitic effects of magnetic and electric fields. One of the ways to achieve grouping is by using conduit/raceways etc. If a raceway etc is used, all conductors of the circuit must be contained therein.


There are acceptations when using romex in plastic boxes, that will relieve the heating in metal boxes. But it's still not good practice, you are introducing unwanted electrical and magnetic fields into your home.
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Old 07-29-2010, 02:18 PM   #17
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Thanks!
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Old 07-29-2010, 04:27 PM   #18
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Cool !!!!!

Last edited by 57_Hemi; 07-29-2010 at 04:28 PM. Reason: prob solved
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