Washington 06A Limited Energy Systems Electrician EXAM
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Washington 06A Limited Energy Systems Electrician Exam – Study Guide
10-Line Exam Coverage in Points Form
1. Exam Structure & Logistics – 2 exams: 06A-HVAC/R (NEC & Theory) [34 questions, 2
hours] + 06A-HVAC/R (WA Laws & Rules) [17 questions, 1 hour] ; 70% passing score
required per WAC 296-46B-960; all exams are open-book ; PSI exam provider ; exam
application fee $82.80
2. License Scope & Work Limitations – Unlimited by voltage, phase, or amperage (trainees
limited to <600V) ; no work on circuits >600V ; scope excludes new service panels and
motor control centers; includes line-voltage components inside HVAC units, 6-ft flexible
whips, low-voltage control wiring, and bonding gas piping to existing grounding
3. Licensing Requirements – 4,000 hours work experience + 48 hours basic classroom
instruction required ; affidavit of experience must be notarized and filed with L&I ;
application processing ~4 weeks ; 06B hours may credit 2,000 hours toward 06A
4. NEC & Theory Exam Content – 34 questions; includes: NEC 430–450 (Motors, HVAC,
Generators, Transformers) [8 questions], NEC 300–398 (Wiring Methods) [6 questions],
NEC 240 (Overcurrent Protection) [5 questions], NEC 250 (Grounding & Bonding) [5
questions], General Trade Knowledge [10 questions]
5. Washington Laws & Rules Exam – 17 questions; covers RCW 19.28 (Electrical laws) and
WAC 296-46B (Administrative rules) ; open-book; 1-hour time limit
6. Class 2 & Class 3 Circuits – Class 2 circuits: limited energy output, reduced shock/fire
risk; separation from Class 1 conductors required; Class 2 systems typically 0–30V or 0–
60V ; Class 3: higher energy than Class 2 but still power-limited ; NEC Article 725 governs
remote-control and signaling circuits
7. Grounding & Bonding – Low-voltage system grounding; bonding gas piping to existing
grounding conductors ; common exam focus: NEC 250 (Grounding & Bonding) ;
equipment grounding conductor sizing; grounding electrodes for communications
systems
8. Fire Alarm & Security Systems – NFPA 72 governs fire alarm installation and
performance ; power-limited fire alarm circuits; fire alarm circuits must remain
operational during emergencies ; Class 2 low-voltage systems for CCTV and access
control systems, including electric strikes
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9. Cabling & Wiring Methods – Separation of conductors required for safety and
interference prevention ; low-voltage cable routing must avoid mechanical damage and
interference ; structured cabling for data/communications; separation from power
conductors required; plenum/riser cable types; fiber optics for long-distance
transmission in CCTV/security systems
10. State Licensing Process – Complete application including work history; original notarized
affidavits required; no self-verification of experience accepted ; Washington hours not
credited without valid Electrical Training Certificate ; L&I contact: (360) 902-5269 ;
reciprocity with Idaho ; continuing education: 24 hours per licensing period
100 MCQ Questions with Rationales
1. What is the minimum passing score for the Washington 06A HVAC/Refrigeration Limited
Energy Systems Electrician examination?
A) 60%
B) 65%
C) 70%
D) 75%
Correct Answer: C
Rationale: WAC 296-46B-960 requires a minimum passing score of 70% on any examination or
examination section. This applies to both the NEC & Theory exam and the WA Laws & Rules
exam .
2. How many questions are on the 06A-HVAC/R NEC and Theory exam?
A) 34
B) 50
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C) 17
D) 100
Correct Answer: A
Rationale: The 06A-HVAC/R NEC and Theory exam consists of approximately 34 questions. The
specific number of questions in each section may vary slightly .
3. What is the time limit for the 06A-HVAC/R WA Laws and Rules exam?
A) 30 minutes
B) 1 hour
C) 2 hours
D) 3 hours
Correct Answer: B
Rationale: The 06A-HVAC/R WA Laws and Rules exam has a 1-hour time limit. The NEC and
Theory exam has a 2-hour time limit .
4. How many hours of work experience are required to qualify for the Washington 06A
license?
A) 2,000 hours
B) 4,000 hours
C) 6,000 hours
D) 8,000 hours
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Correct Answer: B
Rationale: The 06A HVAC/Refrigeration specialty requires 4,000 hours of work experience in the
appropriate specialty. 06B (restricted) license requires only 2,000 hours .
5. How many hours of basic classroom instruction are required before taking the 06A exam?
A) 24 hours
B) 36 hours
C) 48 hours
D) 72 hours
Correct Answer: C
Rationale: Applicants must complete 48 hours of "basic classroom instruction" before they can
take the 06A exam .
6. Which of the following best describes the voltage limitation for the Washington 06A
license?
A) Limited to 50 volts
B) Limited to 120 volts
C) Limited to 240 volts
D) Not limited by voltage, phase, or amperage
Correct Answer: D
Rationale: The 06A HVAC/refrigeration specialty is not limited by voltage, phase, or amperage.
However, electrical trainees may not work on circuits over 600 volts .