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Question 1General Electrical Knowledge and National Electrical Code Fundamentals

A resistive circuit connected to a 120-volt source draws 15 amperes. What is the resistance of the circuit?

  1. 1800 ohms
  2. 0.125 ohm
  3. 135 ohms
  4. 8 ohms Correct answer.

Explanation

Ohm's law states that resistance equals voltage divided by current. Dividing 120 volts by 15 amperes gives 8 ohms.

Question 2General Electrical Knowledge and National Electrical Code Fundamentals

Under the NEC Article 100 definition, a continuous load is a load in which the maximum current is expected to continue for how long?

  1. 4 hours or more
  2. 1 hour or more
  3. 3 hours or more Correct answer.
  4. 2 hours or more

Explanation

Article 100 defines a continuous load as one where the maximum current is expected to continue for 3 hours or more. This threshold drives the 125 percent sizing rules for conductors and overcurrent devices.

Question 3General Electrical Knowledge and National Electrical Code Fundamentals

Which color or colors are used to identify a grounded conductor?

  1. Blue
  2. Green
  3. White or gray Correct answer.
  4. Black

Explanation

Section 200.6 requires the grounded conductor to be identified by a continuous white or natural gray finish or marking. Green and green with yellow stripes are reserved for equipment grounding conductors.

Question 4General Electrical Knowledge and National Electrical Code Fundamentals

A 240-volt single-phase load draws 10 amperes. What is the power consumed by the load?

  1. 240 watts
  2. 24 watts
  3. 1200 watts
  4. 2400 watts Correct answer.

Explanation

Power in a resistive circuit equals voltage multiplied by current. Multiplying 240 volts by 10 amperes gives 2400 watts.

Question 5General Electrical Knowledge and National Electrical Code Fundamentals

In a series circuit, which quantity is the same at every point in the circuit?

  1. Resistance
  2. Current Correct answer.
  3. Voltage
  4. Power

Explanation

A series circuit provides only one path for current, so the same current flows through every component. The voltage divides across the loads in proportion to their resistances.

Question 6General Electrical Knowledge and National Electrical Code Fundamentals

Receptacle outlets installed in a dwelling unit bathroom must be provided with which of the following?

  1. GFCI protection Correct answer.
  2. AFCI protection
  3. Surge protection
  4. A standard thermal breaker

Explanation

Section 210.8(A) requires ground-fault circuit-interrupter protection for all 125-volt, 15- and 20-ampere receptacle outlets in dwelling unit bathrooms. GFCI protection protects people from lethal ground-fault current.

Question 7General Electrical Knowledge and National Electrical Code Fundamentals

Which of the following ampere ratings is a standard rating for an inverse-time circuit breaker in Table 240.6(A)?

  1. 85 amperes
  2. 95 amperes
  3. 75 amperes
  4. 70 amperes Correct answer.

Explanation

Table 240.6(A) lists standard ampere ratings, and 70 amperes appears in that list. The table steps from 60 to 70 to 80 to 90 amperes without the intermediate values.

Question 8General Electrical Knowledge and National Electrical Code Fundamentals

For a conductor of fixed material and cross-sectional area, doubling the conductor length causes the resistance to do which of the following?

  1. It is quadrupled.
  2. It is doubled. Correct answer.
  3. It is unchanged.
  4. It is halved.

Explanation

Resistance is directly proportional to conductor length. Doubling the length doubles the resistance when material and circular mil area stay the same.

Question 9General Electrical Knowledge and National Electrical Code Fundamentals

Along a dwelling unit kitchen countertop wall line, receptacle outlets must be installed so that no point along the wall line is more than what distance from a receptacle outlet?

  1. 12 inches
  2. 48 inches
  3. 24 inches Correct answer.
  4. 36 inches

Explanation

Section 210.52(C)(1) requires countertop receptacles so that no point along the wall line is more than 24 inches measured horizontally from a receptacle outlet. This spacing keeps appliance cords from reaching across sinks or being stretched.

Question 10General Electrical Knowledge and National Electrical Code Fundamentals

In box-fill calculations using Table 314.16(B), each 14 AWG conductor is counted as what volume?

  1. 1.75 cubic inches
  2. 2.00 cubic inches Correct answer.
  3. 1.50 cubic inches
  4. 2.25 cubic inches

Explanation

Table 314.16(B) assigns 2.00 cubic inches of free space to each 14 AWG conductor. Larger conductors receive proportionally larger allowances.

Question 11General Electrical Knowledge and National Electrical Code Fundamentals

For equipment operating at 120/240 volts with no live parts on the opposite side of the working space and no grounded surfaces nearby, the minimum depth of the working space is which of the following?

  1. 3 feet Correct answer.
  2. 4 feet
  3. 3.5 feet
  4. 2.5 feet

Explanation

Table 110.26(A)(1) Condition 1 requires 3 feet of working space depth for equipment operating at 150 volts to ground or less where the opposite side has no live parts and no grounded surfaces.

Question 12General Electrical Knowledge and National Electrical Code Fundamentals

A design guideline limits voltage drop on a 240-volt branch circuit to 5 percent. What is that allowable drop in volts?

  1. 9 volts
  2. 6 volts
  3. 5 volts
  4. 12 volts Correct answer.

Explanation

Multiplying 240 volts by 0.05 gives 12 volts. The 5 percent figure is a commonly used design target that keeps equipment operating within its voltage range.

Question 13General Electrical Knowledge and National Electrical Code Fundamentals

A raceway contains five current-carrying conductors. Using Table 310.15(C)(1), what ampacity adjustment factor applies?

  1. 50 percent
  2. 60 percent
  3. 80 percent Correct answer.
  4. 70 percent

Explanation

Table 310.15(C)(1) applies an 80 percent adjustment factor when four to six current-carrying conductors are installed together. The factor accounts for the reduced ability of bundled conductors to dissipate heat.

Question 14General Electrical Knowledge and National Electrical Code Fundamentals

A 20-ampere branch circuit is protected by a 20-ampere circuit breaker. What is the minimum size copper equipment grounding conductor permitted?

  1. 12 AWG Correct answer.
  2. 8 AWG
  3. 10 AWG
  4. 14 AWG

Explanation

Table 250.122 sizes the equipment grounding conductor by the rating of the overcurrent device ahead of the circuit. A 20-ampere device requires a 12 AWG copper equipment grounding conductor.

Question 15General Electrical Knowledge and National Electrical Code Fundamentals

Which of the following describes the branch circuit required for receptacle outlets in a dwelling unit bathroom?

  1. A 20-ampere circuit that supplies only bathroom receptacle outlets Correct answer.
  2. A 15-ampere circuit that may also supply the bathroom lighting outlets
  3. A 20-ampere circuit that may also supply receptacles in other rooms
  4. A 30-ampere circuit dedicated to the bathroom exhaust fan

Explanation

Section 210.11(C)(3) requires at least one 20-ampere branch circuit to supply bathroom receptacle outlets, and that circuit is not permitted to supply outlets outside the bathroom.

Question 16General Electrical Knowledge and National Electrical Code Fundamentals

A dwelling unit must have a minimum of how many 20-ampere small-appliance branch circuits serving the kitchen, pantry, dining room, and similar areas?

  1. At least three
  2. At least four
  3. At least one
  4. At least two Correct answer.

Explanation

Section 210.11(C)(1) requires at least two 20-ampere small-appliance branch circuits for the kitchen, pantry, dining room, and similar areas. Additional circuits may be installed but are not the minimum.

Question 17General Electrical Knowledge and National Electrical Code Fundamentals

In a dwelling unit, arc-fault circuit-interrupter protection is required for branch circuits supplying which of the following?

  1. A 240-volt baseboard heater
  2. The service entrance conductors
  3. Bedroom receptacle outlets Correct answer.
  4. Bathroom receptacle outlets

Explanation

Section 210.12(A) lists bedrooms among the dwelling unit areas requiring AFCI protection of 120-volt branch circuits. Bathrooms are covered by GFCI requirements instead.

Question 18General Electrical Knowledge and National Electrical Code Fundamentals

Which statement about the grounded conductor of a 120-volt branch circuit is correct?

  1. It must terminate on the equipment grounding terminal of a receptacle
  2. It may serve as the equipment grounding conductor if it is bare copper
  3. It carries the unbalanced return current during normal operation Correct answer.
  4. It must be finished in green with a yellow stripe

Explanation

The grounded conductor provides the return path and carries normal operating current. It is separate from the equipment grounding conductor, which carries current only during a fault.

Question 19General Electrical Knowledge and National Electrical Code Fundamentals

Bonding, as defined in NEC Article 100, is best described as which of the following?

  1. Connecting metallic parts together to establish electrical continuity and conductivity Correct answer.
  2. Connecting equipment to a grounding electrode so fault current reaches the earth
  3. Driving a ground rod at a separately derived system
  4. Isolating conductive parts to prevent circulating currents

Explanation

Article 100 defines bonding as the connection of metallic parts to form an electrically conductive path that ensures electrical continuity. Bonding is distinct from grounding, which connects the system to earth.

Question 20General Electrical Knowledge and National Electrical Code Fundamentals

A 20-ampere branch circuit supplies a continuous load. What is the maximum continuous load current permitted on this circuit?

  1. 16 amperes Correct answer.
  2. 20 amperes
  3. 24 amperes
  4. 12 amperes

Explanation

Sections 210.19(A)(1) and 210.20(A) require conductors and overcurrent devices to be sized at 125 percent of the continuous load. The inverse of that rule limits a continuous load to 80 percent of the circuit rating, or 16 amperes on a 20-ampere circuit.

Question 21General Electrical Knowledge and National Electrical Code Fundamentals

A box contains 10 copper 12 AWG conductors, two device yokes each holding a receptacle, and internal cable clamps. What is the minimum box volume required?

  1. 31.50 cubic inches
  2. 24.75 cubic inches
  3. 29.25 cubic inches
  4. 33.75 cubic inches Correct answer.

Explanation

Each 12 AWG conductor counts as 2.25 cubic inches, and each yoke counts as two conductor volumes. The total is 10 conductors plus one clamp plus four yoke volumes, or 15 allowances, times 2.25 cubic inches, which equals 33.75 cubic inches.

Question 22General Electrical Knowledge and National Electrical Code Fundamentals

Chapter 9, Table 1 limits the fill of a raceway containing more than two conductors to what percentage of the raceway cross-sectional area?

  1. 53 percent
  2. 60 percent
  3. 31 percent
  4. 40 percent Correct answer.

Explanation

Chapter 9, Table 1 permits a raceway containing more than two conductors to be filled to 40 percent of its interior cross-sectional area. Single conductors are limited to 53 percent and two conductors to 31 percent.

Question 23General Electrical Knowledge and National Electrical Code Fundamentals

A 240-volt, 50-ampere single-phase load is supplied by 100 feet of 10 AWG copper conductors. Using K = 12.9 and a circular mil area of 10380 for 10 AWG, what is the approximate voltage drop?

  1. 1.5 volts
  2. 6.2 volts
  3. 3.1 volts
  4. 12.4 volts Correct answer.

Explanation

The single-phase voltage drop formula is 2 x K x I x L divided by the circular mil area. Substituting gives 2 x 12.9 x 50 x 100 divided by 10380, which is approximately 12.4 volts.

Question 24General Electrical Knowledge and National Electrical Code Fundamentals

A service is supplied by 2/0 AWG copper conductors. What is the minimum size copper grounding electrode conductor permitted by Table 250.66?

  1. 2 AWG
  2. 6 AWG
  3. 8 AWG
  4. 4 AWG Correct answer.

Explanation

Table 250.66 specifies the grounding electrode conductor by the size of the largest service-entrance conductor. For 1/0 through 2/0 copper service conductors, the minimum copper grounding electrode conductor is 4 AWG.

Question 25General Electrical Knowledge and National Electrical Code Fundamentals

For a motor branch circuit, an inverse-time circuit breaker used for short-circuit and ground-fault protection is generally permitted to be sized at not more than what percentage of the motor full-load current?

  1. 250 percent Correct answer.
  2. 200 percent
  3. 175 percent
  4. 125 percent

Explanation

Table 430.52 permits an inverse-time circuit breaker to be rated up to 250 percent of the motor full-load current. This higher allowance accommodates motor starting current while still providing short-circuit protection.

Question 26General Electrical Knowledge and National Electrical Code Fundamentals

Under NEC Article 100, a continuous load is one in which the maximum current is expected to continue for:

  1. 3 hours or more Correct answer.
  2. 4 hours or more
  3. 2 hours or more
  4. 1 hour or more

Explanation

Article 100 defines a continuous load as one where the maximum current is expected to continue for 3 hours or more. The 3-hour threshold is what triggers the 125 percent sizing rules for conductors and overcurrent devices serving such loads.

Question 27General Electrical Knowledge and National Electrical Code Fundamentals

One horsepower is equivalent to approximately how many watts?

  1. 1,000 watts
  2. 746 watts Correct answer.
  3. 550 watts
  4. 1,341 watts

Explanation

The mechanical equivalent of one horsepower is about 746 watts, a conversion used constantly when comparing motor output ratings with electrical input power. Motor current calculations typically start from the horsepower rating converted to watts or taken directly from the motor tables.

Question 28General Electrical Knowledge and National Electrical Code Fundamentals

Ohm's law relates voltage, current, and resistance. Which equation correctly states that relationship?

  1. E = R ÷ I
  2. E = I² × R
  3. E = I ÷ R
  4. E = I × R Correct answer.

Explanation

Ohm's law states that voltage equals current multiplied by resistance, written E = I × R. The other forms, I = E/R and R = E/I, follow by algebraic rearrangement of the same relationship.

Question 29General Electrical Knowledge and National Electrical Code Fundamentals

Two 10-ohm resistors are connected in parallel. What is the total resistance of the combination?

  1. 20 ohms
  2. 5 ohms Correct answer.
  3. 0.1 ohm
  4. 10 ohms

Explanation

For two equal resistors in parallel, the total resistance is half of one resistor's value because the reciprocal formula 1/RT = 1/R1 + 1/R2 gives 1/RT = 0.1 + 0.1 = 0.2, so RT = 5 ohms. Parallel paths always produce a total resistance lower than the smallest individual resistor.

Question 30General Electrical Knowledge and National Electrical Code Fundamentals

A balanced three-phase 208-volt load draws 20 amperes per phase. What is the approximate apparent power?

  1. about 12.5 kVA
  2. about 7.2 kVA Correct answer.
  3. about 2.4 kVA
  4. about 4.2 kVA

Explanation

For a balanced three-phase load, apparent power equals the square root of three times line voltage times line current: 1.732 × 208 × 20 ≈ 7,205 VA, or about 7.2 kVA. The square root of three accounts for the phase relationship among the three lines.

Question 31General Electrical Knowledge and National Electrical Code Fundamentals

A circuit uses 90°C-rated conductors, but the circuit breaker terminals are rated 75°C and the equipment terminals at the load are rated 60°C. Which temperature rating limits the conductor ampacity?

  1. The average of the three ratings
  2. 60°C Correct answer.
  3. 90°C
  4. 75°C

Explanation

NEC 110.14(C) requires that conductor ampacity not exceed the lowest temperature rating of any connected termination, conductor, or device. With a 60°C load termination in the circuit, the ampacity must be based on the 60°C column even though the conductors themselves are rated 90°C.

Question 32General Electrical Knowledge and National Electrical Code Fundamentals

Article 100 defines "readily accessible" as capable of being reached quickly for operation, renewal, or inspection under which condition?

  1. Without climbing over or removing obstacles Correct answer.
  2. Only after notifying the owner
  3. Only with a key or special tool
  4. Only by using a portable ladder

Explanation

The Article 100 definition requires that the item be reachable quickly without requiring a person to climb over or remove obstacles or to resort to portable ladders. Access that depends on keys, tools, or owner notification does not meet the definition.

Question 33General Electrical Knowledge and National Electrical Code Fundamentals

A 100-ampere feeder is wired with THHN copper conductors and all terminations are rated 75°C. What is the minimum conductor size permitted?

  1. 1/0 AWG
  2. 2 AWG
  3. 4 AWG
  4. 3 AWG Correct answer.

Explanation

With 75°C terminations, the conductor is selected from the 75°C ampacity column of Table 310.16. A 3 AWG copper conductor is rated 100 amperes at 75°C, making it the smallest size that satisfies the requirement.

Question 34General Electrical Knowledge and National Electrical Code Fundamentals

A 25 kVA single-phase transformer has a 240-volt secondary. What is its full-load secondary current?

  1. 83 amperes
  2. 52 amperes
  3. 208 amperes
  4. 104 amperes Correct answer.

Explanation

Full-load current for a single-phase transformer equals the volt-ampere rating divided by the voltage: 25,000 VA ÷ 240 V ≈ 104 amperes. This is the current the secondary conductors and overcurrent protection must be designed to carry.

Question 35Wiring Methods, Materials, and Installation Requirements

Type NM cable is permitted to be installed in which of the following locations?

  1. Inside a wet location such as a sump pump pit
  2. Exposed on the exterior surface of a commercial building
  3. Directly buried in soil beneath a patio
  4. Concealed inside a dry interior wall of a dwelling Correct answer.

Explanation

Type NM cable is listed for dry locations and is typically concealed in wall, floor, and ceiling cavities of dwellings. It is not permitted in wet locations, in the voids of masonry block foundations, or where it would be exposed to physical damage.

Question 36Wiring Methods, Materials, and Installation Requirements

In a dwelling unit, receptacle outlets along wall spaces must be installed so that no point along the floor line is more than what distance from a receptacle outlet?

  1. 10 ft (3.0 m)
  2. 6 ft (1.8 m) Correct answer.
  3. 4 ft (1.2 m)
  4. 8 ft (2.4 m)

Explanation

Section 210.52(A) requires receptacle outlets in dwelling unit wall spaces so that no point along the floor line of any wall space is more than 6 ft from a receptacle. The 6 ft is measured along the floor line, and wall spaces 2 ft or wider are included.

Question 37Wiring Methods, Materials, and Installation Requirements

A 125-volt, 15- or 20-ampere receptacle outlet installed in a dwelling unit bathroom requires which of the following?

  1. GFCI protection Correct answer.
  2. Special permission from the AHJ
  3. A weatherproof enclosure
  4. A dedicated 30-ampere branch circuit

Explanation

Section 210.8(A) requires ground-fault circuit-interrupter protection for all 125-volt, 15- and 20-ampere receptacle outlets installed in dwelling unit bathrooms. The protection is required regardless of the receptacle's distance from the tub or shower.

Question 38Wiring Methods, Materials, and Installation Requirements

The conductor intended to serve as the grounded conductor of a branch circuit is identified by which color?

  1. Green with a yellow stripe
  2. Orange
  3. White or gray Correct answer.
  4. Bare copper

Explanation

Section 200.6 requires the grounded conductor to be identified by a continuous white or gray finish, or by three continuous white stripes on other than green insulation. Green, green with yellow stripes, and bare copper identify equipment grounding conductors.

Question 39Wiring Methods, Materials, and Installation Requirements

Type UF cable installed directly in the earth beneath a residential lawn that is not subject to vehicular traffic must have a minimum cover of:

  1. 6 in (150 mm)
  2. 12 in (300 mm)
  3. 18 in (450 mm)
  4. 24 in (600 mm) Correct answer.

Explanation

Table 300.5 lists 24 in as the minimum cover for direct-buried Type UF cable in areas not subject to vehicular traffic. Lesser depths are permitted only where the installation meets one of the specific exceptions, such as added physical protection.

Question 40Wiring Methods, Materials, and Installation Requirements

Splices and joints in conductors of a wiring method must be:

  1. Insulated with two layers of tape
  2. Enclosed in an approved box Correct answer.
  3. Made only with solderless connectors
  4. Accessible only to qualified persons

Explanation

Section 300.15 requires joints and splices to be made with approved splicing means and enclosed in an approved box, conduit body, or other enclosure. The enclosure must also remain accessible as required by 314.29.

Question 41Wiring Methods, Materials, and Installation Requirements

Which receptacles installed in a dwelling unit must be listed as tamper resistant?

  1. Only receptacles installed in attached garages
  2. Only bathroom receptacles located near a sink
  3. Only receptacles within 6 ft of a laundry sink
  4. 125 V, 15- and 20-A receptacles in dwellings Correct answer.

Explanation

Section 406.12 requires all 125-volt, 15- and 20-ampere receptacles installed in dwelling units to be listed as tamper resistant, with limited exceptions such as those located more than 5.5 ft above the floor. The requirement applies throughout the dwelling, not just in selected rooms.

Question 42Wiring Methods, Materials, and Installation Requirements

Electrical metallic tubing must be securely fastened in place at intervals not exceeding:

  1. 6 ft
  2. 10 ft Correct answer.
  3. 3 ft
  4. 12 ft

Explanation

Section 358.30 requires EMT to be securely fastened at intervals not exceeding 10 ft and within 3 ft of each box, cabinet, conduit body, or termination. Fastening must also be within 3 ft of the raceway termination point.

Question 43Wiring Methods, Materials, and Installation Requirements

Where three or more conductors are installed in a raceway, the conductors may occupy no more than what percentage of the raceway's interior cross-sectional area?

  1. 40 percent Correct answer.
  2. 31 percent
  3. 60 percent
  4. 53 percent

Explanation

Chapter 9, Table 1 limits conductor fill in a raceway to 40 percent of the interior cross-sectional area where three or more conductors are installed. One conductor is limited to 53 percent and two conductors to 31 percent.

Question 44Wiring Methods, Materials, and Installation Requirements

A raceway contains six current-carrying 10 AWG THHN copper conductors. What ampacity adjustment factor applies to these conductors?

  1. 100 percent
  2. 50 percent
  3. 70 percent
  4. 80 percent Correct answer.

Explanation

Table 310.15(C)(1) requires an 80 percent adjustment factor where four, five, or six current-carrying conductors are installed in a single raceway. A 70 percent factor applies to seven through nine conductors.

Question 45Wiring Methods, Materials, and Installation Requirements

Where a cable is run through a bored hole in a wood framing member, the hole must be at least what distance from the nearest edge of the member unless the cable is protected by a steel plate?

  1. 2-1/2 in (64 mm)
  2. 1-1/4 in (32 mm) Correct answer.
  3. 3/4 in (19 mm)
  4. 1 in (25 mm)

Explanation

Section 300.4(A)(1) requires bored holes in wood members to be at least 1-1/4 in from the nearest edge, or the cable must be protected by a steel plate at least 1/16 in thick. The plate protects the cable from nails and screws driven into the framing.

Question 46Wiring Methods, Materials, and Installation Requirements

A receptacle outlet serving a dwelling unit kitchen countertop must be installed not more than what height above the countertop?

  1. 12 in
  2. 18 in
  3. 20 in Correct answer.
  4. 24 in

Explanation

Section 210.52(C)(5) requires countertop receptacles to be installed not more than 20 in above the countertop surface. Receptacles higher than that do not count toward the required countertop receptacle coverage.

Question 47Wiring Methods, Materials, and Installation Requirements

Arc-fault circuit-interrupter protection is required for 120-volt, 15- and 20-ampere branch circuits supplying which of the following in a dwelling unit?

  1. Bathroom branch circuits
  2. Living room and bedroom outlets Correct answer.
  3. Fire alarm system circuits
  4. Outdoor 240-volt lighting circuits

Explanation

Section 210.12 requires AFCI protection for branch circuits supplying outlets and devices in dwelling unit kitchens, family rooms, dining rooms, living rooms, parlors, libraries, dens, bedrooms, closets, hallways, and similar areas. AFCI protection is intended to detect arcing faults in branch circuit wiring and cords.

Question 48Wiring Methods, Materials, and Installation Requirements

A 208Y/120-volt panelboard is installed in an electrical room with exposed live parts on one side and no grounded parts on the other. What is the minimum depth of the working space in front of the panelboard?

  1. 36 in Correct answer.
  2. 24 in
  3. 30 in
  4. 48 in

Explanation

Table 110.26(A)(1) specifies a minimum working space depth of 3 ft (36 in) for equipment operating at 150 volts or less to ground under Condition 1. Greater depths apply at higher voltages or where grounded surfaces face the working space.

Question 49Wiring Methods, Materials, and Installation Requirements

Rigid nonmetallic conduit (Schedule 40 PVC) installed underground beneath a residential driveway must have a minimum cover of:

  1. 6 in
  2. 24 in
  3. 12 in
  4. 18 in Correct answer.

Explanation

Table 300.5 requires 18 in of cover for rigid nonmetallic conduit installed under a residential driveway. Where the conduit runs under a public street or highway, 24 in of cover is required.

Question 50Wiring Methods, Materials, and Installation Requirements

Nonmetallic-sheathed cable must be secured within what maximum distance of a box or fitting?

  1. 12 in Correct answer.
  2. 6 in
  3. 18 in
  4. 24 in

Explanation

Section 334.30 requires NM cable to be secured within 12 in of every box or fitting and at intervals not exceeding 4-1/2 ft along the run. These supports keep strain off terminations and keep the cable in place.