SK0-004 · Question #110
Which of the following power plug types would MOST likely be found in a medical facility?
The correct answer is D. Twist lock. Twist lock connectors physically lock when twisted into the receptacle, preventing accidental disconnection - a critical safety requirement for medical environments where power loss could endanger patients.
Question
Which of the following power plug types would MOST likely be found in a medical facility?
Options
- ATip/Ring/Sleeve
- BSpeed lock
- CTip/Ring
- DTwist lock
How the community answered
(47 responses)- A4% (2)
- B2% (1)
- C2% (1)
- D91% (43)
Why each option
Twist lock connectors physically lock when twisted into the receptacle, preventing accidental disconnection - a critical safety requirement for medical environments where power loss could endanger patients.
Tip/Ring/Sleeve (TRS) is a 3-conductor audio connector standard used for headphones and microphones, not an electrical power plug type.
Speed lock is not a recognized NEMA or IEC standard for electrical power connectors in any facility classification.
Tip/Ring is a 2-conductor audio or telephone connector, not an electrical power plug type used in facility wiring.
Twist lock connectors (NEMA L-series) require a rotational twist to both engage and disengage, creating a mechanical lock that prevents the plug from being accidentally pulled free. NFPA 99 (Health Care Facilities Code) mandates locking-type receptacles in clinical areas because inadvertent disconnection of power to life-critical medical equipment such as ventilators or monitors can directly threaten patient safety.
Concept tested: Medical facility locking power connector requirements (NEMA twist lock)
Source: https://www.nfpa.org/codes-and-standards/all-codes-and-standards/list-of-codes-and-standards/detail?code=99
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