SK0-004 · Question #366
A datacenter technician encounters a power receptacle labeled NEMA L5-30. Which of the following powers is the socket rated for?
The correct answer is A. 115v 30 amp. The NEMA L5-30 designation identifies a locking receptacle rated for 125V single-phase at 30 amperes, corresponding to a nominal 115V circuit.
Question
A datacenter technician encounters a power receptacle labeled NEMA L5-30. Which of the following powers is the socket rated for?
Options
- A115v 30 amp
- B208v 30 amp
- C220v 1 phase
- D440v 3 phase
How the community answered
(32 responses)- A91% (29)
- B6% (2)
- C3% (1)
Why each option
The NEMA L5-30 designation identifies a locking receptacle rated for 125V single-phase at 30 amperes, corresponding to a nominal 115V circuit.
The NEMA numbering system encodes both voltage class and amperage directly in the receptacle designation. The '5' in L5-30 specifies a 125V (nominal 115V) 2-pole, 3-wire configuration, and '30' indicates the 30-ampere current rating. The 'L' prefix denotes a twist-locking plug design common in data center and commercial environments. Together, these make the L5-30 a 115V/30A locking receptacle.
208V locking receptacles use the NEMA L6 series (e.g., L6-30), not the L5 series, which is exclusively defined for 125V circuits.
220V single-phase power corresponds to NEMA L6 or L14 series receptacles, not the L5 series designation reserved for 125V nominal circuits.
440V three-phase power requires high-voltage NEMA designations such as the L16 or L19 series, which are entirely separate from the L5 series.
Concept tested: NEMA receptacle naming convention and voltage/amperage ratings
Source: https://www.nema.org/standards/view/ANSI-NEMA-WD-6
Topics
Community Discussion
No community discussion yet for this question.