SK0-004 · Question #50
A datacenter technician encounters a power receptacle labeled NEMA L5-30. Which of the following powers is this socket rated for?
The correct answer is A. 115v 30 amp. NEMA L5-30 is a locking receptacle rated for 125V (nominally ~115V) at 30 amps, making option A the correct rating.
Question
A datacenter technician encounters a power receptacle labeled NEMA L5-30. Which of the following powers is this socket rated for?
Options
- A115v 30 amp
- B208v 30 amp
- C220v 1 phase
- D440v 3 phase
How the community answered
(27 responses)- A85% (23)
- B4% (1)
- C4% (1)
- D7% (2)
Why each option
NEMA L5-30 is a locking receptacle rated for 125V (nominally ~115V) at 30 amps, making option A the correct rating.
In the NEMA designation L5-30, 'L' indicates a locking connector, '5' designates the 125V (nominal ~115V) configuration class, and '30' specifies the 30-amp current rating. This is a standard single-phase locking receptacle commonly found in data centers for high-draw equipment requiring a secure, non-accidentally-disconnectable connection.
208V 30A corresponds to NEMA L6-30, not L5-30 - the '6' designator in the NEMA system identifies 250V/208V class receptacles.
220V single-phase would correspond to a NEMA L6 or L7 series receptacle, not the NEMA 5-series which is strictly 125V class.
440V 3-phase is a high-voltage 3-phase rating associated with NEMA L16 or similar 3-phase locking designations, not the single-phase NEMA L5 series.
Concept tested: NEMA receptacle voltage and amperage ratings
Source: https://www.nema.org/standards/view/ANSI-NEMA-WD-6-Wiring-Devices-Dimensional-Requirements
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