How many receptacles are required in a 20'x20' meeting room? (210.52(A) math question)

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careful

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Location
USA
Occupation
Engineer
Let's use a simple 20'x20' square meeting room as an example. How many wall-mounted receptacles would you say are required?

I've seen it explained both ways online, which means different answers. Knowing each wall is 20' long, there are 4 walls, and a the per12' rule from 210.52(A):

Method 1:
(20 * 4)/12 = 6.67.
Round up to 7.
7 receptacles are required.

Method 2:
(20 / 12) = 1.67.
Round up to 2.
2 * 4 = 8
8 receptacles are required.
 
Depends on the location of the entries to the room. Each wall space is considered separately and will require some minimum number of receptacle outlets. Add those up to get the total. Then for a meeting room, 210.65 provides the flexibility to layout those receptacle outlets any way you want.

If there is only one entry to the room, with a single continuous wall space wrapping around the room, then 7 is your answer, as wall space length is measured around corners. Unless the opening is 8' or more, then we are down to 6.

Cheers, Wayne
 
careful said:
Let's use a simple 20'x20' square meeting room as an example. How many wall-mounted receptacles would you say are required?

I've seen it explained both ways online, which means different answers. Knowing each wall is 20' long, there are 4 walls, and a the per12' rule from 210.52(A):

Method 1:
(20 * 4)/12 = 6.67.
Round up to 7.
7 receptacles are required.

Method 2:
(20 / 12) = 1.67.
Round up to 2.
2 * 4 = 8
8 receptacles are required.
Click to expand...
210.52 is for residential.
Meeting rooms have their own section. 210.65

Ron
 
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