Max Receptacles for Empty Space

[scnkapc]

For an empty store front, can I put 13 receptacles on one 20amp circuit? Art. 220.12 (I) says that says that I have to calculate 180va for each receptacle. For 13 at 180va=2340va / 120v =19.5 amps.

 

[RICK NAPIER]

Yes

 

[scnkapc]

How do you figure?

 

[RICK NAPIER]

you have already done your load calculations and it works providing the receptacles are not for specific loads or other limiting condition.

 

[Ponchik]

How do you figure?

generally store fronts/commercial do not have the same requirements as do dwellings. So you dont need any receptacles for a empty unit. But if you are installing them then your calculation is fine.

 

[scnkapc]

Thanks

 

[dicklaxt]

Back in the day we were limited to 80% of the branch ckt rating 210.23(A)(1) may have been the answer 2008...........don't know what 2011 says.

dick

 

[kwired]

Where does it say that 180VA per outlet is continuous or non continuous load? That is what the 80% loading is all about.

Some have suggested in the past that the 180VA per outlet is for figuring feeders and service calculations and not necessarily for branch circuits. Not sure what I really think about that, but generally do not put that many general purpose receptacles on one circuit that it matters anyway.

 

[Sierrasparky]

if those are 13 duplex then you need to double the load!

 

[texie]

if those are 13 duplex then you need to double the load!

Why so?

 

[Sierrasparky]

if you are using 180 V/A per receptacle then you need to calculate 360 per duplex.
A duplex is 2 receptacles.

 

[jumper]

if you are using 180 V/A per receptacle then you need to calculate 360 per duplex.
A duplex is 2 receptacles.

Ummm....

220.14(I) Receptacle Outlets. Except as covered in 220.14(J)
and (K), receptacle outlets shall be calculated at not less
than 180 volt-amperes for each single or for each multiple
receptacle on one yoke. A single piece of equipment consisting
of a multiple receptacle comprised of four or more receptacles
shall be calculated at not less than 90 volt-amperes per
receptacle. This provision shall not be applicable to the receptacle
outlets specified in 210.11(C)(1) and (C)(2).

 

[Ponchik]

if you are using 180 V/A per receptacle then you need to calculate 360 per duplex.
A duplex is 2 receptacles.

It is 180VA per strap. either one receptacle or multiple receptacles on the strap.

edited to add >>As posted earlier. I was a bit late.

 

[Sierrasparky]

It seems that I missed that in the changes for the 2005 NEC. I don't do much that requires this type of calculation these days. Most EE specify more circuits because of customer requirements.




:?OOOOPS

 

[kwired]

It seems that I missed that in the changes for the 2005 NEC. I don't do much that requires this type of calculation these days. Most EE specify more circuits because of customer requirements.




:?OOOOPS

I think the only thing that changed was this part: "single piece of equipment consisting
of a multiple receptacle comprised of four or more receptacles
shall be calculated at not less than 90 volt-amperes per
receptacle"

The 180 VA per yoke has been there for a long time.