Texas Journeyman Sign Electrician

Key Concepts

Code arrangement and enforcement (Article 90) - The Code is divided into the introduction and nine chapters; Chapters 1, 2, 3, and 4 apply generally. Chapters 5, 6, and 7 cover special occupancies, equipment, and conditions. Chapter 8 (communications) is not subject to Chapters 1 through 7 except where specifically referenced in Chapter 8. Chapter 9 consists of tables applicable as referenced. (90.3) - Mandatory rules use shall or shall not (90.5(A)); permissive rules use shall be permitted or shall not be required (90.5(B)); informational notes are informational only and not enforceable (90.5(C)); informative annexes are not part of the enforceable requirements (90.5(D)). - Metric units follow the International System of Units (SI) (90.9(A)). SI appears first with inch-pound in parentheses, based on hard conversion except as provided in 90.9(C) (90.9(B)). Soft conversion is permitted for trade sizes, extracted material, industry practice (90.9(C)(3)), and safety. Compliance with either system constitutes compliance (90.9(D)).…

Key Concepts

Scope and number of services. Article 230 covers service conductors and equipment for services not over 1000 volts ac or 1500 volts dc, nominal (230.1). A building or other structure served shall be supplied by only one service unless permitted in 230.2(A) through (D) — special conditions (fire pumps, emergency systems, legally required standby, optional standby, interconnected power production sources, multiple-supply systems for enhanced reliability), special occupancies by special permission, capacity requirements in excess of 2000 amperes at 1000 volts or less, or different voltages/frequencies/phases/uses (230.2). Where more than one service supplies a building, a permanent plaque or directory is required at each service disconnect location (230.2(E)). Service conductors shall not pass through the interior of another building (230.3; 230.5 in the 2026 text).

Topic: Electrical Feeders (3 questions, 4% of the exam)

Key Concepts

Minimum feeder conductor ampacity. Where a feeder supplies continuous loads or any combination of continuous and noncontinuous loads, the minimum feeder conductor size shall have an ampacity not less than the noncontinuous load plus 125 percent of the continuous load — 215.4(A)(1) (the verified practice question cites this rule as NEC 215.2(A)(1)). Three exceptions: assemblies listed for operation at 100 percent of rating; portions connected at both ends to separately installed pressure connections under 110.14(C)(2); and grounded conductors not connected to an OCPD, which may be sized at 100 percent of the load. Separately, 215.4(A)(2) requires ampacity not less than the maximum load after any adjustment or correction factors per 310.14; the conductor must satisfy the larger of (A)(1) or (A)(2) and comply with 110.14(C).

Key Concepts

Branch-circuit ratings. "The rating for other than individual branch circuits shall be 10, 15, 20, 30, 40, and 50 amperes" (210.18). Exception No. 1 permits multioutlet branch circuits greater than 50 amperes where only qualified persons service the equipment; Exception No. 2 states 10-ampere branch circuits shall not supply receptacle outlets. Ratings such as 25 amperes are not recognized.

Minimum conductor ampacity. Branch-circuit conductors must have an ampacity not less than the larger of: (1) the noncontinuous load plus 125 percent of the continuous load per 310.14, or (2) the maximum load served after adjustment/correction factors per 310.15 — and must comply with 110.14(C) for terminations (210.19(A)). Conductors supplying more than one receptacle for cord-and-plug-connected portable loads shall have an ampacity not less than the rating of the branch circuit (210.19(B)); with a 15-ampere minimum circuit, that is 14 AWG copper.

Key Concepts

Voltage and general limits - Chapter 3 wiring methods "shall be used for 1000 volts ac, 1500 volts dc, nominal, or less where not specifically limited elsewhere in Chapter 3" — 300.4(A). - Where raceways are installed in wet locations above grade, the raceway interior is a wet location, and conductors must comply with 310.10(C) — 300.9. The interior of enclosures or raceways installed underground is likewise a wet location — 300.5(B) (2023). - Metal raceways "shall not be supported, terminated, or connected by welding" unless specifically designed or permitted — 300.18(B).

Conductors - Minimum size for ratings up to 2000 volts: 16 AWG copper, 14 AWG copper-clad aluminum, 12 AWG aluminum, except as permitted elsewhere — 310.5(A). - Conductors 8 AWG and larger in raceways shall be stranded unless permitted/required to be solid — 310.5(C). - Vertical raceway support: conductors must be supported where the rise exceeds Table 300.19(A); at least…

Electrical Equipment and Devices (Articles 404, 406, 408, 410, 422/440, 430, 445, 450)

Key Concepts

Receptacles (Article 406) - All 15- and 20-ampere, 125- and 250-volt nonlocking-type receptacles in guest rooms and guest suites of hotels and motels and their common areas must be listed tamper-resistant receptacles — 406.26(2). The same list also covers dwelling units, child care facilities, dormitories, and park and recreation areas. - Receptacles of 15 and 20 amperes, 125 and 250 volts in a wet location require an enclosure that is weatherproof whether or not the attachment plug is inserted; an outlet box hood installed for this purpose shall be listed and identified as extra-duty — 406.9(B)(1). - Receptacles shall not be installed within a zone measured 900 mm (3 ft) horizontally from any outside edge of a bathtub or shower stall and 2.5 m (8 ft) vertically from the floor — 406.9(C)(1). - Screwless push-in terminals: not greater…

Key Concepts

• Conductors for a single continuous-duty motor: ampacity not less than 125 percent of the motor full-load current rating as determined by 430.6(A)(1) (430.22).
• Which current to use: For ampacity of conductors, current ratings of switches, and branch-circuit short-circuit and ground-fault protection, use the values in Table 430.247 through Table 430.250 instead of the nameplate current (430.6(A)(1)). The nameplate current rating is used for separate motor overload protection and for motors built for low speeds (less than 1200 RPM), high torques, canned pumps, or multispeed motors (430.6(A)(2)). The rating of an inverse time circuit breaker must be based on the table full-load current, not nameplate amperage (430.52(B)).
• Feeder conductors (430.24): 125 percent of the highest rated motor's FLC plus the sum of the full-load currents of the other motors in the group. The highest rated or smallest rated motor is determined from Table 430.247–430.250 (430.17).
• **Overload protection, continuous-duty motors…

Key Concepts

Sign and outline lighting disconnects - Each sign and outline lighting system, feeder conductors, or branch circuits supplying a sign, outline lighting system, or skeleton tubing must be controlled by an externally operable switch or circuit breaker that opens all ungrounded conductors and controls no other load (600.6). Exceptions: exit directional signs inside a building, and cord-connected signs with an attachment plug. Signs in fountains follow 680.13. - The disconnect must be accessible and located per 600.6(A)(1) point of entry, 600.6(A)(2) within sight of the sign, or 600.6(A)(3) within sight of the controller (600.6(A)). - Within sight of the sign: if out of the line of sight of any section able to be energized, it must be lockable in accordance with 110.25, plus permanent field-applied marking on the sign visible during servicing (600.6(A)(2)). - Within sight of the controller: located within sight of, or in the same enclosure with, the controller; must…

Electric Signs and Outline Lighting (Article 600)

Key Concepts

Listing and marking - Fixed, mobile, or portable electric signs, section signs, outline lighting, PV powered signs, and retrofit kits, regardless of voltage, shall be listed and labeled, provided with installation instructions, and installed in conformance with that listing — NEC 600.3. Exceptions: field-installed skeleton tubing is not required to be listed where installed in conformance with the Code (600.3(A)), and outline lighting need not be listed as a system when it consists of listed luminaires wired per Chapter 3 (600.3(B)). - Listing labels and markings identifying input voltage and current rating shall be visible after installation and located in a position visible prior to servicing; the marking is permitted in a location not viewed by the public — 600.4(B). - Signs with lampholders for incandescent lamps must be marked with maximum allowable lamp wattage, in permanently installed letters at least **6 mm (¼…