District exam facts, verified Oct 19, 2026

District of Columbia Electrician Licensing Exam Prep

The District of Columbia exam is given by PSI and written on the NEC 2011. Check the exam format, license path and topic weights from District of Columbia's official sources.

District of Columbia journeyman exam

Open journeyman prep

District of Columbia master exam

Open master prep

District of Columbia electrician practice questions with answers

No reviewed NEC 2011 practice questions for District of Columbia yet.

Your District of Columbia exam at a glance

Exam provider
PSI Services (DC OPLA program).
Code edition the exam tests
NEC 2011

Code edition: the exam vs. the installation code

They differ. The District of Columbia exam tests the NEC 2011, but installations in District of Columbia follow the NEC 2014, in effect since May 29, 2020. Study the NEC 2011 for the exam.

What the exam is written on

2011 NEC. The PSI DC Contractor/Trades Candidate Information Bulletin (updated 8/25/2022) lists the 2011 National Electrical Code plus Ugly's Electrical References as the approved references for every DC electrician exam (220 Master, 307 Journeyman, 824 Residential Maintenance, 338 Journeyman Sign, 309 Low-voltage).

Adopted for installations

Installation code: the 2017 DC Construction Codes, effective May 29, 2020. They include the 2014 NEC (NFPA 70-2014) as amended by 12-C DCMR (the DC Electrical Code).

Who licenses electricians in District of Columbia, and the license path

Licensing authority: DC Board of Industrial Trades, staffed by the Department of Licensing and Consumer Protection (DLCP), Occupational and Professional Licensing Administration.

  1. Apprentice Electrician

    Registered without an exam, no experience needed.

  2. Journeyman Electrician (called 'Electrician' in 17 DCMR 218)8,000 hours

    Statute §47-2853.92(b) requires a class on Title 12C DCMR (DC Electrical Code) or an equivalent code completed within 2 years before applying, plus one of: (1) at least 8,000 hours as an apprentice over at least 4 years; (2) an electrical engineering degree plus 2 years of practical experience certified by a licensed master; or (3) Board-approved equivalent experience.

  3. Master Electrician

    Statute §47-2853.92(c): meet all journeyman requirements in (b), including the 12C code class within 2 years, plus at least 4 years working as a journeyman electrician.

  4. Master Electrician Limited (Low Voltage) / Master Electrician Specialist

    Statute §47-2853.92(b) applies the journeyman eligibility rules to the 'master electrician limited (low voltage)'.

  5. Other electrician classes

    Residential Maintenance Electrician (PSI #824: 60 questions, 3 hours, open book).

District of Columbia exam content outline

Topics and weights from the District of Columbia exam outline
TopicWeight
MASTER (#220): General Knowledge and Plan Reading12%
MASTER (#220): Services and Service Equipment16%
MASTER (#220): Feeders4%
MASTER (#220): Branch Circuits and Conductors16%
MASTER (#220): Wiring Methods and Materials19%
MASTER (#220): Equipment and Devices10%
MASTER (#220): Control Devices3%
MASTER (#220): Motors and Generators8%
MASTER (#220): Special Occupancies, Equipment, and Conditions12%
JOURNEYMAN (#307): General Knowledge6%
JOURNEYMAN (#307): Services and Service Equipment11%
JOURNEYMAN (#307): Feeders4%

Key District of Columbia amendments

  • The 12-C DCMR (2017 DC Electrical Code) amends NFPA 70-2014.
  • The DC Electrical Code amendments are not among the approved exam references.

Common misconceptions about the District of Columbia exam

  • That the DC exam is on the 2020, 2023 or 2017 NEC. The PSI bulletin and DLCP both say the 2011 NEC.
  • That DC enforces the 2020 or 2023 NEC. It still enforces the 2014-NEC-based 2017 DC Construction Codes.
  • That the DC exams are closed book. All the electrician exams are open book.
  • Using the wrong question counts or times: master is 100 questions in 5 hours and journeyman is 80 questions in 4 hours. Do not mix these up with other states' PSI numbers (for example 3-hour or 4.5-hour exams).
  • Inventing a published passing score such as 70% or 75%. The PSI DC bulletin gives no percentage, and passing candidates see only 'PASS'.
  • That the journeyman needs 4,000 hours. That is the outdated figure in 17 DCMR 218.1.

Official sources for District of Columbia

Facts verified Oct 19, 2026 against these official sources.

Go beyond free District of Columbia practice

Free practice questions are open to everyone. Mock exams, adaptive practice and the full question bank need a paid exam-prep plan.

District of Columbia exam questions people ask

Which code edition does the District of Columbia exam test?

The NEC 2011. That is not the code installations follow: District of Columbia enforces the NEC 2014 (effective May 29, 2020). Study the edition the exam is written on.

Who gives the District of Columbia exam?

PSI Services (DC OPLA program).