When connected to a branch circuit supplying two or more receptacle outlets, receptacle ratings should conform to table 210.21(b)(3) of the NEC, unless higher than what amperage?

Receptacle ratings for circuits supplying two or more outlets need to adhere to specific guidelines to ensure safety and proper functionality. According to the National Electrical Code (NEC), when receptacles are connected to a branch circuit, they typically need to follow the ratings outlined in table 210.21(b)(3). However, this requirement changes when the branch circuit is rated higher than 50 amperes.

When the branch circuit exceeds this amperage, receptacles do not have to conform to the lower rating specified in that table. Instead, they can accommodate higher capacity devices or connections, thus allowing for a more robust usage of the branch circuit without compromising safety or performance.

This understanding is crucial for ensuring the correct application of receptacle ratings in higher amperage scenarios since using receptacles rated for less than the circuit’s capacity could lead to overheating, equipment failure, or fire hazards. In summary, receptacle ratings must align with the NEC guidelines, but when the circuit exceeds 50 A, higher ratings become permissible, promoting safe and efficient electrical installations.