How many amps is a NEMA 5-30R receptacle rated to support?

The correct answer is D. 30 amps. A NEMA 5-30R receptacle is rated for 30 amps, which is encoded directly in its designation - the number after the hyphen always indicates the amperage rating. Option A (5 amps) is wrong because the "5" in NEMA 5-30R identifies the configuration type (125V, 2-pole, 3-wire…

Power Systems in the Data Center

Question

How many amps is a NEMA 5-30R receptacle rated to support?

Options

A5 amps
B15 amps
C20 amps
D30 amps

How the community answered

(43 responses)

A
9% (4)
B
5% (2)
C
2% (1)
D
84% (36)

Explanation

A NEMA 5-30R receptacle is rated for 30 amps, which is encoded directly in its designation - the number after the hyphen always indicates the amperage rating. Option A (5 amps) is wrong because the "5" in NEMA 5-30R identifies the configuration type (125V, 2-pole, 3-wire grounding), not the amperage. Options B and C are wrong because 15 and 20 amps correspond to different receptacles: a NEMA 5-15R handles 15 amps and a NEMA 5-20R handles 20 amps.

Memory tip: In NEMA receptacle codes, read past the hyphen to find the amps - the number after the dash is the amperage rating.

Topics

#NEMA receptacle#power rating#electrical standards#amperage

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