Does the NEC define a "dining room"? 210.52(B)(1)

Question

I've attached a rough sketch of our house layout. My question is about the room labeled with a "?". Would the NEC consider this a "dining room", even if there isn't any typical dining room furniture - that is, no dining room table/chairs, no buffet/sideboard, no dish/china storage, etc? (We have a couch, a piano, and a desk in there.) It's largely open to what we call the "living room", with an open doorway to the kitchen. All walls are full ceiling height. The kitchen has a small table (like a breakfast nook) in it where we usually eat, when we're not eating in the living room in front of the TV, or outside on the back patio. We don't have any room in particular that we use as a "dining room", but if a future owner were to have a dining room, this "?" room would most likely be it.

The question arises because the NEC requires 20 amp circuitry in a "dining room", per 210.52(B) below. The house is currently wired such that that entire "?" room is served by one (dedicated) 15 amp circuit, with 14/2 wiring and a 15 amp breaker, for all the receptacles and lighting in that room.

(The kitchen does have the 2 required 20amp small appliance circuits.)

EDIT to clarify: the house is about 100 years old; the 15amp circuitry is already in place (an has been for decades). There are some wiring updates happening - addition of a couple of receptacles. I know I can just ask the inspector, but... I'm afraid to even raise the issue, in case he never raises it either. :)

I believe the 2014 NEC says the following:

210.52 Dwelling Unit Receptacle Outlets.

(B) Small Appliances.

(1) Receptacle Outlets Served. In the kitchen, pantry, breakfast room, dining room, or similar area of a dwelling unit, the two or more 20-ampere small-appliance branch circuits required by 210.11(C)(1) shall serve all wall and floor receptacle outlets covered by 210.52(A), all countertop outlets covered by 210.52(C), and receptacle outlets for refrigeration equipment.

EDIT to add: After reading the answers below... I still don't know if the room is even required to be classified as a "dining room" (which was my original question), but if it is, then I guess that if I want to add 2 wall receptacles to that room, code would require hooking them up to one of the existing 20-amp kitchen circuits, rather than hooking them up to the existing 15-amp circuitry in that room.

Or just keep everything as is and continue using extension cords as we have been. (Safe? No. Compliant? Yes.)

It's funny that the reason we want to add receptacles of course has nothing to do with "dining room" purposes; we just want a convenient outlet for an audio system and a computer. Tying those in to the kitchen circuitry seems absurd, as does installing a new 20-amp circuit just for those outlets. But oh well. Maybe somebody someday will want to put a hot plate in that room, and boy will they thank me for having put in a couple of 20-amp outlets! (Even though they're not required to be labeled as such. Go figure. Here's hoping they don't plug the hot plate into the wrong outlet, or the breaker will trip. Heavens! I can see why the NEC can't allow that!)

Answer 1

Regs are designed to account for common usages and provide safe levels of service. Dining rooms often use hotplates or coffee makers that might need higher amperage. A 20 amp circuit requirement attempts to account for that.

There is no use inspector who comes in after your construction to make sure that you follow convention. But houses that do not meet basic expectations are harder to sell, and often result in a compliance problem when they are sold (No closing until we get a new certificate of occupancy!)

That argues for equipping rooms in compliance with what the typical inspector would expect. Most inspectors would think that the room in question was a dining room (since most people would have one in that location). I would wire it as a dining room, but use it as I saw fit. Wiring to a higher standard is never frowned upon, and only costs a bit of wire and a little time, and may avoid headaches down the road.

And, who knows, you may want a dining room and a hotplate someday?

SUPPLEMENT: After reading Ed Beal's answer, I am inclined to agree so long as there are no countertops in the room in question.

Answer 2

There are 4 required 120V 20 amp branch circuits in a dwelling unit 210.12.C (1,2,3). 2 for the kitchen small appliance branch circuit, 1 for the laundry and 1 for the Bathroom. Other than the spacing (no point more than 6' from an outlet 210.52.A.1) There is no requirement for the size of other 120v branch circuit. The 20A small appliance branch circuits can be used in A pantry and dining room 210.52.B.1 but they are not required to be on the Small appliance branch circuits. A single 15A dedicated circuit in a dining room is legal (and exceeds general code requirements) in the 2014 code 20A is not required. Response two long for a comment so added to answer. The 2 small appliance branch circuits must be available in the kitchen even if there are only 2 outlets. It is Ok to use them in the dining and pantry but not required unless there is a local code amendment and they can not be used in any other rooms (210.52.B.2 No other outlets) exceptions A clock outlet in the kitchen, Pantry or dining room is allowed Outlet for the ignition circuit on a gas fired range.

The code reference states General provisions A1 thru A4 . A1 spacing no space greater than 6' to an outlet. A2 wall space any space 2' or more needs outlet. A3 outlets on floor need to be within 18" of wall to count for that space. A4 counter top 210.52.C outlets do not count for required outlets in 210.52.a That is the requirement A1-A4. This has been code for many cycles the addition of the 20A circuit is newer and I have not been required to change the ampacity of wiring when doing updates like this. 4 Wire Electric ranges are required by current code but 3 wire systems in older homes like yours are still legal unless a local code change is in place.