Texas - Journeyman Lineman Electrician

Mandatory rules use 'shall' or 'shall not' and are specifically required or prohibited, while permissive rules use 'shall be permitted' or 'shall not be required' and describe allowed but not required options.

Informational notes are included for reference purposes only and are not enforceable, whereas mandatory rules characterized by 'shall/shall not' are legally enforceable requirements.

Chapters 1–4 apply generally to all electrical installations, while Chapters 5–7 apply only to special occupancies, special equipment, or other special conditions and may supplement or modify Chapters 1–4.

Chapter 8 covers communications systems and is NOT subject to the requirements of Chapters 1–7 except where specifically referenced, making it largely self-contained.

Grounded (neutral) conductor terminals must be white or silver-colored, while equipment grounding conductor terminals are identified by green or bare copper.

Conductors 6 AWG or smaller must have a continuous white or gray outer finish for identification, while larger conductors may use other approved identification methods.

Continuous loads require conductors sized at 125% of the load, whereas noncontinuous loads only require conductors sized at 100% of the load when calculating minimum branch-circuit conductor ampacity.

Dwelling unit GFCI requirements (210.8(A)) cover specific locations like kitchens, bathrooms, garages, and areas near sinks, while commercial bathroom requirements (210.8(B)) apply to all 125V–250V receptacles supplied by single-phase circuits rated 150V or less to ground.

The purpose (90.1) defines why the Code exists—practical safeguarding of persons and property from electrical hazards—while the scope (90.2) defines which installations the Code covers and explicitly excludes (e.g., ships, aircraft).

The AHJ is responsible for making interpretations of NEC rules and approving equipment as a standard duty, but may only waive specific NEC requirements by special permission when equivalent safety objectives can be achieved by alternative methods.

SI (metric) units appear first in the NEC dual system, but where there is a conflict between SI and inch-pound values, the inch-pound values govern.

Compliance with the NEC results in an installation essentially free from hazard but not necessarily efficient, convenient, or adequate for good service; the Code is not intended as a design specification or instruction manual for untrained persons.