11:27PM | 02/03/07
Member Since: 02/03/07
1 lifetime posts
I'm finishing a 13x13' room in a friend's basement. I finished my own basement including the electrical that involved installing a six-circuit sub-panel with a 60-Amp feed from the main panel located in the garage. All was Code compliant, so I am reasonably fluent in household electrical wiring.

With my friend's basement, I plan to use grooved 1" or 1.5" rigid foam board. I will secure the foam board on to the poured concrete slab walls with 1x3" furring strips via a powder actuated gun and drive pins. Standard one-half inch drywall will follow.

Does Code allow slitting the rigid foam board insulation and pressing sheathed electrical cable into the slitted cavities? Or, does Code require running conduit down along the furring strips (outside the drywall) to an electrical outlet? If the former is allowable, what kind of outlet boxes would you recommend along with how to fasten them given the situation described?



05:09AM | 02/04/07
Member Since: 04/25/05
1916 lifetime posts
This is similar to wiring an insulated concrete form (ICF) house.

Common practice is to cut a slot for the wire and then use a few dabs of foam to hold it in place.

These reference that I am linking to show a special box, but on also shows using a regular Carlon box (blue). But note the tab on side. That tab will be screwed or nailed to the front of the furing strip.

NM does not need to be protected if it is more than 1 1/4" from a nailing surface (furing strip). Run it several inches from the furring strips and then over to the box.

Also note that these boxes have to be shallow. So, at least in some places, they used a 4 sq box and then put a single gang mud plate on it. That gives you much more space for box fill.


Post a reply as Anonymous

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


type the code from the image


Post_new_button or Login_button

An affordable way to introduce color and pattern to your retro kitchen is with tablecloths, dish towels, and curtains. Opt... Reused steel windows create an eye-catching splashguard in this walk-in shower. The vintage factory windows bring an inter... A galvanized steel tub is a surprising but charming fixture in this bright and breezy screened patio. It's perfect for was... If you're not crazy about the idea of commingling plants and pool, this modern variation may be more to your liking. The s... Yes, a freestanding garage can become its own tiny house. Artist Michelle de la Vega has all the comforts of a modern resi... If you lack plumbing skills but have a good sturdy tree, here's the easiest outdoor shower solution of all: Simply attach... Pursue what's known as the stack effect. To achieve it, open the windows on both the upper and lower floors, and as warm a... How do you like this smart use for an old bottle? Clamp an empty wine bottle to a fence or wall near your outdoor deck or ... Simple and striking, a couple of pieces of "lovingly used" furniture creates a special kind of charm. A weathered chair fo... Twine lanterns add pops of crafty—but sophisticated—flair to any outdoor setting. Wrap glue-soaked twine around a balloon ... When securely fastened to a tree or the ceiling of a porch, a pallet and some cushioning make the ideal place to lounge. V... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... For the cost of a can of exterior paint , you can totally transform your porch. Paint the floor a hue that complements yo... Repurpose birthday hats to create a string of lanterns for your porch, patio, or garden. Cut the tip of the cone, punch h... This garden shed has been decked out to the nines. Designer Orla Kiely created the intimate home for a flower trade show, ...
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon