COMMUNITY FORUM

JonathanGennick

05:36AM | 06/06/04
Member Since: 11/02/02
69 lifetime posts
Bvelectrical
My house has a surface-mounted service panel. When I run a new circuit, must I run conduit into the joist area before I can begin running NM-B cable? Somewhere I read that NM-B cannot be exposed on a basement wall. At the moment though, I can't find that in my copy of the NEC, so I remain open to being wrong.

The following links show three views of my panel:

http://gennick.com/panel1.jpg (front view)

http://gennick.com/panel2.jpg (left-side view)

http://gennick.com/panel3.jpg (right-side view)

The panel was put in two years ago by an electrician, who swapped out my old, 60-amp, 4-fuse box. Since then, I've added two circuits, one for each of two bathrooms. Those circuits are the two conduits you see in the photo. In each case, I ran conduit containing THHN up to the joist area, to a 4-inch box, and then ran NM-B to the bathroom outlets.

I don't have a lot of room to put in more conduit, and I wonder whether I really need to (or should) use conduit at all. On the one hand, it doesn't seem right to have exposed NM-B coming that far down the side of the box. On the other hand, the electrician two years ago ran one NM-B cable out the right-hand-side. It's the white one you see in panel3.jpg. So maybe ok to do that?

I did realize the other day that the electrician also ran most of the cables out the top of the box. Frankly, I hadn't thought about that. If I go out the top, does that obviate the need for conduit? Does it matter that the cables are exposed for a couple inches before entering the joist area?

Bottom-line, do I need to use conduit when running a new circuit, or does code allow me to run NM-B from the joist area down through one of the knockouts on the side of the box? What would best-practice be? How would you run the cables coming out of this box?

Jonathan Gennick
" target="blank">http://gennick.com


Tom O

05:49AM | 06/06/04
Member Since: 09/17/02
477 lifetime posts
The requirement for protection is a judgement call. The likelyhood of damaging cables up high is far smaller than damaging an exposed cable on the wall at 3 or 4 feet above the floor.

I don't see any problem with bringing the cable to the panel without protection. Your panel looks fairliy typical & makes me wonder if you live in WV.

Cables are required to be secured within 12 inches of the panelboard, it appears that some of your cables aren't.

In the right view, if you were to run multi wire circuits in the conduit (looks like 1/2" EMT) you would have room in the conduit for a total of six 2 wire circuits. You would need a bigger junction box though.

Tom

JonathanGennick

06:02AM | 06/06/04
Member Since: 11/02/02
69 lifetime posts
Tom, Thanks for taking the time to look at my photos and answer my question. BTW, I'm in northern Michigan. That conduit on the right-hand side is 3/4-inch EMT. I'm not sure I want to mess with that again. I had the devil of a time knocking the 3/4-inch ring on the box. The 1/2-inch ring popped out easily, but the larger ring was a bit of a battle to get loose. I wonder whether there's some sort of knockout-removal tool that I can buy.

You're right. Some of the original wiring just hangs loose. In fact, none of the original wiring is secured near the box. I don't want to second-guess the electrician who installed the new panel for me, but I think his approach was to pop in the new panel, and as for everything else, I think he just left well-enough alone. Though he also didn't secure (nor GFCI) the kitchen counter outlet that he installed for me at the same time that he replaced the panel.

Jonathan Gennick
" target="blank">http://gennick.com


Click_to_reply_button
Inspiration_banner

INSPIRATION GALLERY



Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.

Reply_choose_button

Anonymous

Post_new_button or Login_button
Register

Write a message on your pumpkin but avoid the trouble of etching or carving. Go for chalkboard paint instead! Filling an underutilized area beneath the stairs is a smart way to save space. Doing so with a stash of wood, however, is ... The Audubon Society inspired wallpaper in this Adirondack-styled entryway will get you in the outdoor mood. Grab your coat... Chalkboard paint opens up endless possibilities for customizing your dresser time and time again. Use chalk to label the c... A fireplace in the bathroom creates the ultimate setting for relaxation. Homeowners often choose electric or gas over wood... Yes, a freestanding garage can become its own tiny house. Artist Michelle de la Vega has all the comforts of a modern resi... There’s nothing like a new set of cabinet hardware to refresh a room. The possibilities are endless: Go modern, rustic, or... A kitchen in a greenhouse—who wouldn't enjoy spending time in this light-filled space? Details that enhance the conservato... Chalkboard paint features prominently in this elegant yet unpretentious headboard design. Add a new message daily to reflec... Twine lanterns add pops of crafty—but sophisticated—flair to any outdoor setting. Wrap glue-soaked twine around a balloon ... The indecisive homeowner need not fret over choosing one (or even two) cabinet colors. The kitchen cabinets in this artist... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... Simple and striking, a couple of pieces of "lovingly used" furniture creates a special kind of charm. A weathered chair fo... The Infinite Artisan Fire Bowl from Eldorado Outdoor is made from glass-fiber reinforced concrete, and offered in Oak Barr... The vibrant green of Granny Smith apples make a beautifully natural alternative to the traditional evergreen wreath. Brigh...
Follow_banner_a
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon
 
webapp2