JOURNEYMEN TEST 3
What is the minimum size conductor that may be used for an overhead feeder which is 35 feet in length from a residence to a remote garage? #10 cu. #8 cu. #6 cu. #4 cu.
#10 cu. Key word: Overhead spans Article 225.6(A)(1) Conductor Size and Support. (A) Overhead Spans. Open individual conductors shall not be smaller than the following: (1) For 1000 volts, nominal, or less, 10 AWG copper or 8 AWG aluminum for spans up to 15 m (50 ft) in length, and 8 AWG copper or 6 AWG aluminum for a longer span unless supported by a messenger wire
When supplying a nominal 120 v rated air conditioner, the length of the flexible supply cord shall not exceed ______ feet. 4ft. 6ft. 8ft. 10ft.
10ft. Key word: Air conditioner, Disconnecting means Article 440.64 Supply Cords. Where a flexible cord is used to supply a room air conditioner, the length of such cord shall not exceed 3.0 m (10 ft) for a nominal, 120-volt rating or 1.8 m (6 ft) for a nominal, 208- or 240-volt rating.
Nonmetallic sheath cable must be supported within ______ of a metal box. 6 inches 12 inches 24 inches 48 inches
12 inches Key word: Nonmetallic-sheated cable (Type NM, NMC, NMS) Support Article 334.30 Securing and Supporting. Nonmetallic-sheathed cable shall be supported and secured by staples; cable ties listed and identified for securement and support; or straps, hangers, or similar fittings designed and installed so as not to damage the cable, at intervals not exceeding 1.4 m (41∕2 ft) and within 300 mm (12 in.) of every cable entry into enclosures such as outlet boxes, junction boxes, cabinets, or fittings. Flat cables shall not be stapled on edge.
Underground service conductors and cables emerging from the grade must be protected from mechanical injury to a height of at least ____ feet. 12ft. 8ft. 15ft. 9ft.
8 ft. Key word: Underground wiring, protection of Article 300.5(D)(1) Underground wiring, protection of. (D) Protection from Damage. Direct-buried conductors and cables shall be protected from damage in accordance with 300.5(D)(1) through (D)(4). (1) Emerging from Grade. Direct-buried conductors and cables emerging from grade and specified in columns 1 and 4 of Table 300.5 shall be protected by enclosures or raceways extending from the minimum cover distance below grade required by 300.5(A) to a point at least 2.5 m (8 ft) above finished grade.
All fixtures installed in damp locations shall be marked ________. waterproof suitable for wet locations damp locations weatherproof
suitable for wet locations Key word: Luminaries, Damp, wet or corrosive locations Article 410.10(A) Luminaires in Specific Locations. (A) Wet and Damp Locations. Luminaires installed in wet or damp locations shall be installed such that water cannot enter or accumulate in wiring compartments, lamp-holders, or other electrical parts. All luminaires installed in wet locations shall be marked, "Suitable for Wet Locations." All luminaires installed in damp locations shall be marked "Suitable for Wet Locations" or "Suitable for Damp Locations."
Insulated bushings are required on conduit entering boxes, gutters, etc. if the conduit contains conductors as large as _______. #2 #4 #0 #6
#4 Key word: Conductors, Insulation, At bushing 300.4(G) (G) Insulated Fittings. Where raceways contain 4 AWG or larger insulated circuit conductors, and these conductors enter a cabinet, a box, an enclosure, or a raceway, the conductors shall be protected by an identified fitting providing a smoothly rounded insulating surface, unless the conductors are separated from the fitting or raceway by identified insulating material that is securely fastened in place.
A raceway containing 30 current carrying conductors, the ampacity of each conductor shall be reduced _____ percent. 80% 70% 45% 50%
45% Key word: Ampacities, Conductors Table 310.15(B)(3)(a) Adjustment Factors for More Than Three Current-Carrying Conductors Number of Conductors1 Percent of Values in Table 310.15(B)(16) Through Table 310.15(B)(19) as Adjusted for Ambient Temperature if Necessary 4-6/80 7-9/70 10-20/50 21-30/45 31-40/40 41 and above 35
Rod electrodes of steel or iron shall have a diameter of at least _______ . 1/2 inch 3/4 inch 1 inch 5/8 inch
5/8 inch Key word: Pipe electrodes Article 250.52(A)(5)(b) (A) Electrodes Permitted for Grounding. (5) Rod and Pipe Electrodes. Rod and pipe electrodes shall not be less than 2.44 m (8 ft) in length and shall consist of the following materials. (b) Rod-type grounding electrodes of stainless steel and copper or zinc coated steel shall be at least 15.87 mm (5 ∕ 8 in.) in diameter, unless listed.
The minimum headroom of working spaces about control centers shall be _______. 3 1/2ft. 1/2ft. 6ft. 6 1/2ft.
6 1/2Ft. Key word: Control Center, Working space Article 110.26(A)(3) Spaces About Electrical Equipment. (3) Height of Working Space. The work space shall be clear and extend from the grade, floor, or platform to a height of 2.0 m (6 1∕2 ft) or the height of the equipment, whichever is greater.
The height of a circuit breaker used as a switch shall not exceed ______ above the floor. 4ft. 4 1/2ft. 5ft. 6 feet 7 inches
6 feet 7 inches Key word: Circuit Breaker, Accessibility and grouping Article 404.8(A) Accessibility and Grouping. (A) Location. All switches and circuit breakers used as switches shall be located so that they may be operated from a readily accessible place. They shall be installed such that the center of the grip of the operating handle of the switch or circuit breaker, when in its highest position, is not more than 2.0 m (6 ft 7 in.) above the floor or working platform.
For household ranges rated ______ or more rating, the minimum branch circuit rating shall be 40 amperes. 4kw 6kw 8kw 8 3/4kw
8 3/4kw Ranges, branch circuits Article 210.19(A)(3) (3) Household Ranges and Cooking Appliances. Branch-circuit conductors supplying household ranges, wall-mounted ovens, counter-mounted cooking units, and other household cooking appliances shall have an ampacity not less than the rating of the branch circuit and not less than the maximum load to be served. For ranges of 83∕4 kW or more rating, the minimum branch-circuit rating shall be 40 amperes.
The ampacity of the phase conductors from generator terminals to the first overcurrent device shall not be less than ______ percent of the nameplate current rating of the generator. 80% 115% 125% 150%
115% Key word: Generator, Conductor ampacity Article 445.13 Ampacity of Conductors. (A) General. The ampacity of the conductors from the generator output terminals to the first distribution device(s) containing overcurrent protection shall not be less than 115 percent of the nameplate current rating of the generator.
Except where fire stops are required, it shall be permissible to extend cablebus vertically through dry floors and platforms, provided the cablebus is totally enclosed at the point where it passes through the floor or platform and for a distance of _______ feet above the floor or platform. 6ft. 8ft. 10ft. 4ft.
6 ft Key word: Cablebus, Support and extension through walls and floors Article 370.18(B) Cablebus Installation. (B) Through Dry Floors and Platforms. Except where fire-stops are required, cablebus shall be permitted to extend vertically through dry floors and platforms, provided that the cablebus is totally enclosed at the point where it passes through the floor or platform and for a distance of 1.8 m (6 ft) above the floor or platform.
When the voltage to a building is 480/277, and the service drop runs not more than four feet past the edge of the overhang of the roof, how high must it be above the roof? 18 inches 3ft. 4ft. 8ft.
8 feet. Key word: Overhead service conductors, clearances Article 230.24(A) (A) Above Roofs. Conductors shall have a vertical clearance of not less than 2.5 m (8 ft) above the roof surface. The vertical clearance above the roof level shall be maintained for a distance of not less than 900 mm (3 ft) in all directions from the edge of the roof.
Conductors run above the top level of a window shall be permitted to be less than the ______ requirement. 2ft. 3ft. 4ft. 8ft.
3ft. Key word: Services (This is the only word you need find the Article/Section) Article 230.9 Exception; Clearances on Buildings. Service conductors and final spans shall comply with 230.9(A), (B), and (C). (A) Clearances. Service conductors installed as open conductors or multi-conductor cable without an overall outer jacket shall have a clearance of not less than 900 mm (3 ft) from windows that are designed to be opened, doors, porches, balconies, ladders, stairs, fire escapes, or similar locations. Exception: Conductors run above the top level of a window shall be permitted to be less than the 900 mm (3 ft) requirement.
Tap conductors in a metal raceway for recessed fixture connections shall be limited to ______ feet in length. 2ft. 4ft. 6ft. 10ft.
6 ft. Key word: Recessed luminaries, wiring Article 410.117(C) Wiring. (C) Tap Conductors. Tap conductors of a type suitable for the temperature encountered shall be permitted to run from the luminaire terminal connection to an outlet box placed at least 300 mm (1 ft) from the luminaire. Such tap conductors shall be in suitable raceway or Type AC or MC cable of at least 450 mm (18 in.) but not more than 1.8 m (6 ft) in length.
Five pieces of kitchen equipment in a restaurant would have a feeder demand factor of _______ percent. 65% 70% 80% 90%
70% Key word: Kitchen equipment, commercial Article 220.56 Kitchen Equipment — Other Than Dwelling Unit(s). It shall be permissible to calculate the load for commercial electric cooking equipment, dishwasher booster heaters, water heaters, and other kitchen equipment in accordance with Table 220.56.