electrical detached garage ?

Posted by on February 26, 2009, 11:13 am

> jamesgan...@gmail.com wrote:

> > wrote:

> >> Bill wrote:
> >>> What does your code say about the additional ground rod?
> >>> Could cause problems with two separate grounds.
> >>>> Any electricians in the group? =A0Building a detacted garage about 1=

> >>>> feet from the house. =A0Want to put in a 70amp subpanel. =A0From wha=

t I've

> >>>> read the garage need's to have it's own grounding rod. And I need to
> >>>> run both hots, a neutral, and a ground from the main panel. =A0And t=

> >>>> ground and neutral need to NOT be connected together in the sub pane=

> >>>> Have I got this right???
> >> you cannot have too many grounds. =A0 BUT, having said that, he still
> >> needs the separate ground all the way back to the main panel if he has
> >> ANY other metallic connections between the buildings.
> >> steve

> > Since phone and tv count looks like I do.
> > I returned my 6 space box and picked up a 12 space one. =A0So I'll have
> > 2 for hot water, 2 for the hvac, one 20 for the garage outlets, one 20
> > for the garage 3/4 bath, one 20 for the bar area, one 15 for all the
> > lights and one 15 for the upstairs outlets. =A0And 3 spares.

> Sounds like a deal. =A0'cept i'd run a 20 to those upstairs outlets. =A0I
> don't use any 14 ga wire at all any more except for some limited
> lighting circuits. =A0How many outlets upstairs and what's going to be
> plugged into them?- Hide quoted text -
> - Show quoted text -

TV, stereo, table lamps, that sort of stuff. Seems to me that if I
have to put the 3/4 bath on it's own circuit and I'm running a 20amp
circuit for the wet bar I don't really need a 20amp circuit for the
outlets in the rest of the room. When you do that you also buy the
20amp outlets instead of the 15amp ones?

Posted by Wayne Whitney on February 26, 2009, 12:05 pm

> TV, stereo, table lamps, that sort of stuff. Seems to me that if I
> have to put the 3/4 bath on it's own circuit and I'm running a 20amp
> circuit for the wet bar I don't really need a 20amp circuit for the
> outlets in the rest of the room. When you do that you also buy the
> 20amp outlets instead of the 15amp ones?

The only time you are required to use a 20 amp receptacle is when the
receptacle is fed by a dedicated 20 amp circuit. It's very common to
use 15 amp receptacles on a 20 amp branch circuit. Given the minimial
price difference between 14/2 and 12/2 Romex, I think it makes sense
to only run 20 amp circuits.

Cheers, Wayne

Posted by on February 26, 2009, 12:20 pm

> > TV, stereo, table lamps, that sort of stuff. =A0Seems to me that if I
> > have to put the 3/4 bath on it's own circuit and I'm running a 20amp
> > circuit for the wet bar I don't really need a 20amp circuit for the
> > outlets in the rest of the room. =A0When you do that you also buy the
> > 20amp outlets instead of the 15amp ones?

> The only time you are required to use a 20 amp receptacle is when the
> receptacle is fed by a dedicated 20 amp circuit. =A0It's very common to
> use 15 amp receptacles on a 20 amp branch circuit. =A0Given the minimial
> price difference between 14/2 and 12/2 Romex, I think it makes sense
> to only run 20 amp circuits.
> Cheers, Wayne

Interesting. I would have thought that would be a problem. After all
you could pull 20amps through one outlet without causing a fault if
it's breakered at 20amps. Not that I really have a problem with it
since I realize in real life you are much more likely to have several
loads that add up. Just sort of surprised cause it seems like the
sort of thing that would be disallowed by the code.

I am going to use 20 amp outlets on the 20 amp circuit in the garage
circuit but there is a lot more chance of a single large load in a
garage.

Posted by Wayne Whitney on February 26, 2009, 12:49 pm

> I am going to use 20 amp outlets on the 20 amp circuit in the garage
> circuit but there is a lot more chance of a single large load in a
> garage.

My understanding is that, at least for spec grade and above, the
innards of a 15 amp and 20 amp receptacle are identical; the only
difference is the extra slot for the T-shaped neutral prong. I've
never even seen any equipment with a 20 amp plug, so practically there
is little value to the 20 amp receptacle.

Cheers, Wayne

Posted by on February 26, 2009, 1:00 pm

> > I am going to use 20 amp outlets on the 20 amp circuit in the garage
> > circuit but there is a lot more chance of a single large load in a
> > garage.

> My understanding is that, at least for spec grade and above, the
> innards of a 15 amp and 20 amp receptacle are identical; the only
> difference is the extra slot for the T-shaped neutral prong. =A0I've
> never even seen any equipment with a 20 amp plug, so practically there
> is little value to the 20 amp receptacle.
> Cheers, Wayne

That's really good to know. Perhaps I'll just use the regular outlets
on the garage floor then. I agree, never see anything with that odd
plug. Thanks :-)

Page 5 of 13 < 1 2 3 > last >>

Similar Threads	Posted
Adding 2nd floor above detached garage	March 18, 2007, 7:07 pm
How do I install a drain in my detached garage?	February 4, 2009, 2:32 pm
adequate spacing between detached garage and house?	August 19, 2006, 12:37 pm
detached garage insulation- vapor barrier needed?	August 10, 2006, 10:27 am
Adding Electrical To garage	September 29, 2008, 8:33 am
Electrical Wiring Q	July 20, 2006, 8:50 pm
ELECTRICAL QUESTION	November 29, 2006, 10:24 pm
alt.building.electrical?	April 2, 2007, 8:44 pm
Electrical Professional	May 4, 2008, 4:26 pm
Electrical: centralized breakerbox	November 19, 2006, 8:52 pm

electrical detached garage ? - Page 5