COMMUNITY FORUM

rollnpc

06:38AM | 09/25/06
Member Since: 09/24/06
5 lifetime posts
Bvelectrical
Hello all, I am having a hard time finding some information about residential new construction wiring (California).

I am building my own home and running all my own electrical. My service entrance is on the end of my garage and my Bedrooms are the furthest they can be from that point...

My distance from service to the very last plug in my master bathroom may be as far as 140 to 160 feet away. This will be a 110v 20amp circuit. I also have another bathroom and a bedroom that will be 100-140 feet from my service. I plan on running 12/3 throughout my entire house.

My questions are -

1. On these long runs, will 12/3 suffice or should i be running a 10/3 or?

2. Also can anyone point me to a good reference web site for the home builder/electrician?

3. Can my lights/fans in these rooms be powered on the same circuit as the wall plugs, or do i have to run separate lighting circuits?

Thanks!


Billhart

07:11AM | 09/25/06
Member Since: 04/25/05
1918 lifetime posts
"I plan on running 12-3 through the house".

Unless you are talking about running multi-wire circuits you will want to use 12-2 cable.

My convention the ground wire is also assumed and is not list. Thus 12-2 consists of a black, white, and bare ground wire.

A house like yours is idea for using a sup-panel near the bedrooms.

The NEC allows any mix of receiptacles and lighting fixture on a circuit. However, some local admendments might limit this.

For convience if you are paints, replacign a light or receptacle, etc I prefer to keep the lights on a separate circuits.


rollnpc

07:19AM | 09/25/06
Member Since: 09/24/06
5 lifetime posts
you are right about the 12/2, that is what i want to use, i miss qrote. Thanks for that reminder.

As far as the sub pannel goes, i am beyond the point where a subpannel will work. In hind sight i should have put a sub pannel on my garage/house wall cutting off about 60' from my long runs. I dont think that is a good option now, there really is not a location that would be acception to place a sub pannel.

Do you think that a sub pannel is my only option for these long runs? I have no problem, other than it is going to cost me, to run 10/2 all the way to these distance rooms, then run 12/2 after the first plug. I dont want to under rate anything and would much rather run thicker guage if needed.

I was told i can get away with 12/2 up to 100' but want further opinions.

Thanks again.

Billhart

08:14AM | 09/25/06
Member Since: 04/25/05
1918 lifetime posts
http://www.elec-toolbox.com/calculators/voltdrop.htm

http://www.csgnetwork.com/voltagedropcalc.html

That 3% is fairly restrictive. You could go to 5%. But watch any circuit that will have a heavy load (heater, including hair driers; motors; laser printer).

And by keeping receptacle loads off of lighting you won't see flicker when you run the vac, etc.

For the light you might want to design for a max of 10 amp and use a 15 amp breaker. Taht is easy to do with lighting as you know the max size of bulbs that each will take.

But I am questioning your number for the distance. AS I read it that is LENGTH of the cable run. And that is how those two calculators are setup. 160 ft is a very, very, very long run in a house.

But if you go do raw calculations you need to use the CIRCUIT LENGTH, which is twice the cable lenght as you have both the supply and return wires.

See http://www.stealth316.com/2-wire-resistance.htm

A sub-panel can get into any place that is wide enough for clearnace and not in a bathroom or clothes closet.

Hallway, bedroom. You can hange a picture over it or put it behind a door (but check with you local building inspector before you put it behind a door).


rollnpc

09:16AM | 09/25/06
Member Since: 09/24/06
5 lifetime posts
I am figuring my length from pannel to last outlet. garage is 40 feet, over great room (20'), to master bath (50'), down walls and to last plug (about 30')
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

captcha
type the code from the image

Anonymous

Post_new_button or Login_button
Register

Deep blue grays like the shade shown in this example "have a nautical, serene feeling," says Amy Hendel, designer for Hend... Built on a rocky island in the Drina River, near the town of Bajina Basta, Serbia, this wooden house was cobbled together ... Large steel-framed windows flood the interior of this remodeled Michigan barn with daylight. The owners hired Northworks A... Edging formed with upside-down wine bottles is a refreshing change. Cleverly and artistically involving recycled materials... A Washington State couple called on BC&J Architects to transform their 400-square-foot boathouse into a hub for family bea... Similar to the elevated utensil concept, hanging your pots and pans from a ceiling-mounted rack keeps them nearby and easy... Few projects are more fun than upcycling a vintage piece in a surprising way. Outfitted with a sink and a delicately tiled... The thyme growing between these stepping stones adds a heady fragrance to strolls along this lush, low-maintenance garden ... Decoupage is an easy way to add any paper design to your switch plate, whether it is wallpaper, scrapbook paper, book page... 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... Reluctant to throw away any of those unidentified keys in your junk drawer? Hang them from a few chains attached to a simp... A stripped-down model, sans screened porch, starts out at $79,000. Add the porch, a heated floor for the bath, and all the... Salvaged boards in varying widths and colors make up the dramatic accent wall in this attic space. The high-gloss white of... This garden shed has been decked out to the nines. Designer Orla Kiely created the intimate home for a flower trade show, ...
Follow_banner_a
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon
 
webapp1