// CODE SNIPPET
210.21 Outlet Devices
JUMP TO FULL CODE CHAPTER
Where connected to a branch circuit having a rating in excess of 20 amperes, lampholders shall be of the heavy-duty type. A heavy-duty lampholder shall have a rating of not less than 660 watts if of the admedium type, or not less than 750 watts if of any other type.
A single receptacle installed on an individual branch circuit shall have an ampere rating not less than that of the branch circuit.
Exception No. 1: A receptacle installed in accordance with 430.81(B).
Exception No. 2: A receptacle installed exclusively for the use of a cord- and-plug-connected arc welder shall be permitted to have an ampere rating not less than the minimum branch-circuit conductor ampacity determined by 630.11(A) for arc welders.
Informational Note: See the definition of receptacle in Article 100.
Where connected to a branch circuit supplying two or more receptacles or outlets, a receptacle shall not supply a total cord-and-plug-connected load in excess of the maximum specified in Table 210.21(B)(2).
Table 210.21(B)(2) Maximum Cord-and-Plug-Connected Load to Receptacle
| Circuit Rating (Amperes) | Receptacle Rating (Amperes) | Maximum Load (Amperes) |
|---|---|---|
| 15 or 20 | 15 | 12 |
| 20 | 20 | 16 |
| 30 | 30 | 24 |
Where connected to a branch circuit supplying two or more receptacles or outlets, receptacle ratings shall conform to the values listed in Table 210.21(B)(3), or, where rated higher than 50 amperes, the receptacle rating shall not be less than the branch-circuit rating.
Exception No. 1: Receptacles installed exclusively for the use of one or more cord-and-plug-connected arc welders shall be permitted to have ampere ratings not less than the minimum branch-circuit conductor ampacity determined by 630.11(A) or (B) for arc welders.
Exception No. 2: The ampere rating of a receptacle installed for electric discharge lighting shall be permitted to be based on 410.62(C).
Table 210.21(B)(3) Receptacle Ratings for Various Size Circuits
| Circuit Rating (Amperes) | Receptacle Rating (Amperes) |
|---|---|
| 15 | Not over 15 |
| 20 | 15 or 20 |
| 30 | 30 |
| 40 | 40 or 50 |
| 50 | 50 |
The ampere rating of a range receptacle shall be permitted to be based on a single range demand load as specified in Table 220.55.
Related Code Sections
(D) Wiring and Protection, Outlet Devices
The rating or setting shall not exceed that specified in 210.21 for outlet devices ...
National Electrical Code 2020 of Minnesota > 2 Wiring and Protection > 210 Branch Circuits > 210.20 Overcurrent Protection > (D) Outlet Devices
(3) Wiring and Protection, Receptacle Ratings
Where connected to a branch circuit supplying two or more receptacles or outlets, receptacle ratings shall conform to the values listed in Table ...
National Electrical Code 2020 of Minnesota > 2 Wiring and Protection > 210 Branch Circuits > 210.21 Outlet Devices > (B) Receptacles > (3) Receptacle Ratings
(4) Wiring and Protection, Range Receptacle Rating
The ampere rating of a range receptacle shall be permitted to be based on a single range demand load as specified in Table 220.55 ...
National Electrical Code 2020 of Minnesota > 2 Wiring and Protection > 210 Branch Circuits > 210.21 Outlet Devices > (B) Receptacles > (4) Range Receptacle Rating
(A) Wiring Methods and Materials, Box Volume Calculations
× 1 1 / 2 )
device
123
7.5
5
4
3
3
3
2
1
75 × 50 × 50
(3 × 2 × 2)
device
164
10.0
6
5
5
4
4
3
2 ...
National Electrical Code 2020 of Minnesota > 3 Wiring Methods and Materials > 314 Outlet, Device, Pull, and Junction Boxes; Conduit Bodies; Fittings; And Handhole Enclosures > 314.16 Number of Conductors in Outlet, Device, and Junction Boxes, and Conduit Bodies > (A) Box Volume Calculations