Clarify a print

[skorper]

I have a question about the attached print.
The question concerns circuit referances. All are shown in the elipses.
The main light feed is from A-1 (Panel A, Breaker 1). The one room has its own switch for it. So far so good.
The lighting desginations in the reception area are A-1a and A-1b. The wall switch is labeled $ab.
Does this mean that there are really 2 switches at $ab, one for a lights and one for b lights? If so is it standard practice to have only one $ and not two $$ of ther are really multiple switches?

Thank you very much in advance for you help.

Steve

 

[masterinbama]

There will be 2 switches at the location marked $ab. The designer is wanting the ability to half light the room. So it should be $ $.
a b


The hallway show 3 ways marked c+d it should be $3 $3
c d

 

[skorper]

He did put double $$ in all the rooms for Title 24 requirements, but not in the hallways or common areas.

Than you for the clarification.

Steve

 

[cdslotz]

He did put double $$ in all the rooms for Title 24 requirements, but not in the hallways or common areas.

Than you for the clarification.

Steve

But the hallways are drawn with dual-level switching, even though it's not required.
We only have the energy codes on commercial here.
I think dual-level switching every other fixture is a terrible design, unless you're switching half of the lamps in the same fixture.
Are Occ sensors allowed in resi as an option?

 

[gndrod]

But the hallways are drawn with dual-level switching, even though it's not required.
We only have the energy codes on commercial here.
I think dual-level switching every other fixture is a terrible design, unless you're switching half of the lamps in the same fixture.
Are Occ sensors allowed in resi as an option?

Yes for incandescent (low efficacy) luminaire arrangements. A dimmer circuit still requires an Occ sensor/timer in room lighting that uses medium base sockets.

 

[iwire]

Send an RFI out to find out for sure.

 

[gndrod]

Hi Steve,
Without seeing a legend describing the lighting luminaire types used, most likely those are dual fluorescent troffers feeding in series from the A1 circuit. Like the earlier comments, this is a bogus design that should be better clarified. The lighting feed from another room into the reception area may not operate in this manner with safety in mind unless A1 is a 2pole fed circuit. The drafting is in error.

 

[skorper]

The entire print package is riddled with errors. I know for a fact that an inexperienced GC told a draftsman what to do. The funny thing about this project is that the city plans were approved. (Funny or sorry-you choose.)

Thank you for all of your help.

Steve

 

[stevenje]

The entire print package is riddled with errors. I know for a fact that an inexperienced GC told a draftsman what to do.

So these prints are not EE stamped?

 

[skorper]

Nope.

 

[buzzbar]

Iwire is right, send in a written RFI. Drawings are often incorrect.

 

[cowboyjwc]

If you are here in CA, then you know that any area over 100 sq ft requires dual switching, unless occupancy sensors or a lighting control system is installed. Even if the engineer didn't spec dual switching it would still be required. Just because it's not on the plans doesn't mean you don't have to install it.

 

[cowboyjwc]

If you are here in CA, then you know that any area over 100 sq ft (in commercial) requires dual switching, unless occupancy sensors or a lighting control system is installed.  Even if the engineer didn't spec dual switching it would still be required.  Just because it's not on the plans doesn't mean you don't have to install it.

 

[gndrod]

If you are here in CA, then you know that any area over 100 sq ft (in commercial) requires dual switching, unless occupancy sensors or a lighting control system is installed.  Even if the engineer didn't spec dual switching it would still be required.  Just because it's not on the plans doesn't mean you don't have to install it.

And the plan checker doesn't correct the electrical floor plan layouts either. Especially with a stamped set. 8j

 

[cowboyjwc]

And the plan checker doesn't correct the electrical floor plan layouts either. Especially with a stamped set. 8j

That is true. Since I'm the plan checker too, I try to make sure that it's there.