OR Electrician study guide
OR Electrician · Work through your exam, one topic at a time.
The Oregon electrician licensing exam is the credentialing pathway for electricians who want to work as journeyman or master electricians under Oregon's electrical program, which is administered by the Building Codes Division (BCD) of the Oregon Department of Consumer and Business Services. The exam is built around five bodies of knowledge: the National Electrical Code (NFPA 70), the Oregon Electrical Specialty Code, Oregon statutes and administrative rules governing electrical work, electrical theory and load calculations, and installation safety and trade practices. The OR Electrician study guide has 5 sections and about 1,828 words.
01National Electrical Code (NFPA 70): Structure, Rules, and Application
NFPA 70 is arranged in nine chapters: 1 general, 2 wiring and protection, 3 wiring methods and materials, 4 equipment for general use, 5 special occupancies, 6 special equipment, 7 special conditions, 8 communications systems, and 9 tables. Article numbers track the chapter (210, 250, 310, 430), so knowing the chapter tells you what kind of rule you are reading.
351 words, about 2 min02Oregon Electrical Specialty Code: The NEC as Amended in Oregon
Oregon adopts the National Electrical Code by reference and publishes it with Oregon amendments as the Oregon Electrical Specialty Code (OESC). The OESC is administered by the Building Codes Division (BCD) of the Department of Consumer and Business Services, with oversight advice from the Electrical and Elevator Board.
371 words, about 2 min03Oregon Statutes and Administrative Rules for Electrical Work
Oregon Revised Statutes chapter 479 is the electrical safety law; it establishes licensing, permitting, inspection, and enforcement authority. ORS chapter 455 supports the Building Codes Division structure.
370 words, about 2 min04Electrical Theory and Load Calculations
Ohm law and power relationships drive almost every calculation: E = I x R, P = E x I, and P = I squared x R. In series circuits current is common and voltage divides; in parallel circuits voltage is common and current divides.
384 words, about 2 min05Installation Safety and Trade Practices
Electrical work in Oregon is also governed by Oregon OSHA rules (OAR chapter 437), which adopt federal workplace standards including lockout/tagout and electrical safety requirements. NFPA 70E supplies the consensus practice model: an electrical safety program, risk assessment before energized work, shock and arc flash boundaries, an energized work permit, and personal protective equipment matched to the hazard.
352 words, about 2 min