Independent Electrical Contractors (IEC) 2A Practice Exam

These questions are part of the practice quiz. Start practicing

• When working near live parts, what must you be aware of?
• According to NEC® 300.6(A), which of the following metals are considered to be "ferrous"?
• PPE is required for head, face, neck, ___, hands, arms, feet and legs.
• What is the smallest size copper wire permitted to be used as a main bonding jumper in a 400-A main breaker panelboard?
• What is the smallest size wire permitted for a main bonding jumper in a panel with a 175-A main breaker, when the service entrance conductors are 2/0 AWG?
• Chemical manufacturers and importers must obtain or develop SDS sheets for each hazardous chemical they produce or import. These SDS sheets must be written in which language?
• Grounding electrodes made of galvanized RMC must meet which specification?
• What is required if live parts cannot be put in an electrically safe condition?
• For a 15° saddle installation, what would be the total bends when using four such saddles?
• Which lighting installation requires special attention to location suitability and regulations?
• What insulation rating must branch circuit conductors maintain if located within 3 inches of a ballast?
• What type of receptacles require GFCI protection in commercial repair garages?
• What is the primary focus of a Haz Com Program?
• What is the maximum length of a non-metallic conduit run without an expansion fitting?
• The volume of a 4" square box with depth of 11/2" can accommodate how many conductors of specified gauges?
• Which of the following types of cable does NOT require additional support if spaced appropriately?
• In a main lug panel receiving power from a 300-Amp breaker, what is the smallest EGC that can be run?
• Employees must be informed about the purpose and availability of which written program regarding hazardous chemicals?
• The classification of an area above a spray booth is primarily defined by what factors?
• How many additional supports are required between supports #1 and #2 for a 26-foot length of MC cable?
• The volume calculations of two 14/2 MC cables can yield what approximate cubic inches of space used in a box?
• When applying NEC standards, which of the following is NOT considered a grounding conductor?
• What encompasses the term 'Haz Com Program'?
• What is the minimum number of 1-hole straps needed to fasten 39' of 12-2 MC cable to a wall?
• What is the minimum airflow requirement in a repair garage when the facility is occupied?
• A listed appliance with a 16 AWG flexible power cord and a maximum rating of 15 A is protected by what type of circuit breaker?
• The smallest trade size EMT available that can be installed between two big pull boxes is?
• Which protective device must be used for conductors under 15 amps per NEC standards?
• When making 15° offsets for EMT surface mounting between two equipment enclosures, what is the maximum degree of saddles you can make?
• The minimum size of the equipment grounding conductor (EGC) between a 700-A breaker and a motor using three 350 kcmil conductors is?
• What type of raceway is installed for the BCES service feeder conductors between the pad-mount transformer and the Texas New Mexico power distribution pole?
• In a 6' length of FMC, which supports can be omitted?
• According to NEC, what is the cross-sectional area of an 8 AWG bare solid copper conductor?
• Compared to Schedule 80, what characteristic does Schedule 40 PVC possess?
• Ground rods made of aluminum RMC must meet which specification?
• For load connections with a 150-A circuit breaker and 1 AWG conductors, the minimum size grounding conductor installed between the panel and the pull box is?
• In an open-top spray booth, which vertical distance above the booth is considered a Class I, Division 2 location?
• In which class do buried raceways and cables in a bulk storage plant fall?
• What is the recommended insulation type for a flexible cord used in high-temperature environments?
• The smallest size copper wire permitted as a main bonding jumper in a 200-A main breaker panelboard is ___ AWG.
• The equipment grounding conductor installed between the main switchboard and the transient voltage surge suppressor is ___ AWG.
• Thirty feet of 3/8 inch rebar used to reinforce a poured building slab ___ permitted as a grounding electrode.
• What type of grounding electrode is required to accompany a metal underground water pipe for compliance with NEC®?
• How do support requirements for copper conductors in vertical conduit runs compare to aluminum conductors?
• What is the shortest permitted fixture whip length for a 14 AWG wire connected to a luminaire in a ceiling grid system?
• Article 300 covers wiring that is factory installed in which of the following?
• Which driven electrode can be used in conjunction with a metal underground water pipe as the grounding electrode for your service?
• To avoid violating the NEC®, what is the maximum degree saddle that can be made while making 22.5° offsets?
• What is the requirement for protecting conduits passing through wooden framing members according to the NEC®?
• What is the permissible length of cable between supports in a typical electrical wiring configuration?
• What is the size of the grounding electrode conductor connected to the steel building structure from the BCES main service?
• Electrical wiring installed in aircraft hangar floors must comply with the requirements for which location type?
• What is the maximum number of 3 AWG THWN/THHN conductors that can be installed in a trade size 3 EMT?
• When a luminaire is rated for damp locations, what is its acceptability for different environments?
• Is the installation of 120-volt track lighting allowed on a wall 2 feet above a countertop that is 32 inches AFF according to NEC®?
• What is the main concern when identifying branch circuit conductors near components like ballasts?
• How many conduits for the BCES service feeder conductors are installed between the pad-mount transformer and the Texas New Mexico power distribution pole?
• What is the minimum size main bonding jumper required for a 175-amp service panel with 2/0 conductors?
• When installing flex conduit, what is the trade size of the largest available flex conduit?
• Employers are required to provide employees with what type of information and training on hazardous chemicals?
• What does it mean when spray application equipment is interlocked?
• When surface mounting EMT and making 30° offsets, what is the most degrees of saddles allowed for quick bends due to NEC® limitations?
• According to the BCES prints, what size is the main switchboard's service ground?
• What must a chemical distributor, manufacturer, or importer ensure about each container of hazardous chemical leaving the workplace?
• What is the classification for the interior of a closed container filled with flammable liquid?
• Which type of connector does the NEC permit for connecting power to a 1900 box with flex conduit?
• When considering service entrance conductors of 4/0 AWG, what is the smallest main bonding jumper permissible?
• Where should the concrete-encased electrode be installed during the construction process according to the BCES prints?
• A 3Ø piece of equipment has a nameplate rating of 54 amps at 240 volts 3-phase. What is the smallest AWG cord suitable for connection?
• In a section of 4" x 4" wireway, what is the maximum number of 8 AWG THHN/THWN conductors that can be installed?
• In a science lab, what is the ampacity of a circuit conductor with a GFCI breaker when the ambient temperature is 80°F?
• Are "S" loops allowed for ground movement where service lateral conductors emerge from an underground raceway adjacent to a pad-mounted transformer?
• What does the label "Suitable for thru-wiring" indicate on a luminaire terminal box cover?
• The minimum size GEC to a concrete-encased electrode is ___ AWG.
• Chemical-specific information must always be available through which formats?
• Which of the following constitutes a minor repair in a repair garage?
• Which of the following statements is true regarding conduit size in relation to the NEC®?
• What is one requirement of labeling hazardous chemicals?
• How many equipment grounding conductors are typically installed between the main switchboard and Panel HB1?
• What is the correct calculated width for a pull box if all conductors enter the bottom and exit the right side with the value 4" X 6"?
• When does no further support get necessary for tubing in the electrical box configuration?
• With three 3/0 AWG conductors in one conduit, what is the minimum size main bonding jumper that can be installed?
• What is the purpose of a fixture whip in electrical installations?
• Which statement is true regarding the installation of flexible cords and cables?
• What is the allowance for the smallest main bonding jumper that can be used given the largest ungrounded conductor is 3/0 AWG?
• What type of program should be maintained by employers for workplace hazards?
• Each conduit between the main switchboard and the disconnect switch for Chiller CH-2 contains how many equipment grounding conductors?
• What is the minimum diameter required for grounding electrodes made of aluminum?
• What is the main purpose of SDS sheets in the handling of hazardous chemicals?
• In a method of wiring, where distance from home run box is critical, how far can cable run from the box to the first luminaire?
• What is the maximum area of the flexible metal conduit that can be occupied by the circuit conductors?
• What is a consideration when selecting a lighting fixture for environmental locations?
• What is the smallest GEC that can be installed to building steel when a service panel is fed with four 3/0 AWG copper conductors?
• Which conduit installations are permitted by the NEC® when installed through wooden studs?
• For a 26-foot length of Type AC cable, what is the required number of additional supports between #1 and #2?
• In a service conduit containing three 4/0 AWG conductors, what is the smallest GEC that can be installed to building steel?
• What is the maximum size of the GEC required for a system fed with 600 kcmil conductors?
• According to NEC® standards, the maximum area that can be occupied by circuit conductors in a 12' run of 21/2 inch FMC is?
• What type of metal is galvanized steel considered to be?
• What is the purpose of including an equipment grounding conductor in underground wiring at bulk storage plants?
• Which type of wiring must be installed in metal raceways or specific cable types in aircraft hangars?
• According to electrical codes, how should grounding electrodes be treated when made of RMC?
• According to safety standards, where should safety data sheets be made available?
• What is the current-carrying capacity of a 10 AWG SJO flexible cord when connected to a 120/240-volt, 3-phase system?
• For a 225-amp service using 4/0 AWG service entrance conductors, what is the smallest main bonding jumper allowed?
• What type of bonding jumper is used for lightning protection at the BCES parking lot pole bases?
• What is the minimum length requirement for grounding electrodes made of non-metallic materials?
• How is wiring flexibility defined in electrical installations regarding connecting methods?
• What is the largest size copper wire required when installing a GEC to the main water line from a 200-A main breaker panel?
• What size equipment grounding conductor is required between the safety switch and BCES Chiller 2?
• What type of conduit body is identified as Type T?
• What is the implication of using cords that are not rated for specific temperatures near high-heat components?
• Electrical equipment located under a canopy preventing ignitable vapor accumulation must meet which suitability requirements?
• What is the correct size of the equipment grounding conductor between the MSB and the transient voltage suppressor?
• Is a junction box required where cables, suitable for direct burial, are spliced underground?
• What type of persons are allowed to perform work on live or energized equipment?
• What is the smallest AWG size of SOO flexible cord needed for equipment requiring 2 ungrounded and 1 grounded conductor?
• During what condition does the Equipment Grounding Conductor carry current between the two panels?
• Where can the code reference for GFCI protection of receptacles in commercial garages be found?
• Is the use of lighting tails made from 3/8-inch FMC a violation of the NEC® when connecting recessed luminaires above a lay-in grid ceiling?
• Motor fuel dispensing areas for dispensing gasoline are classified as which type of location?
• Which type of receptacles in aircraft hangars require GFCI protection?
• For a string of fluorescent luminaires connected by 'looping', what is the maximum distance allowed between the home run box and support #1?
• What type of conduit body is represented in the given diagram at IV?
• What must be avoided according to NEC when using dissimilar metals in electrical installations?
• What classification is applied to buried raceways and cables under Class I locations in bulk storage plants?
• What is the required size main bonding jumper for a service entrance feeding a 400-A panelboard with copper conductors?
• What type of lamp is NOT typically associated with high-intensity discharge (HID) luminaires?
• What electrical component must comply with NEC guidelines when being installed outdoors?
• The maximum number of 2/0 AWG THHN/THWN conductors that can be installed in a 6" x 6" wireway is?
• In what classification is a dip or coating tank location categorized?
• The interior of a coating tank containing flammable liquid is classified as what location?
• Is the fryer indicated on the BCES food service drawings gas-fired?
• What is one potential hazard of not bonding equipment enclosures together?
• Does the NEC permit the installation of a box supported only by conduits as described?
• What is a requirement for MC cable support according to NEC guidelines?
• For underground wiring in a bulk storage plant, what is required regarding an equipment grounding conductor?
• True or False: Written Haz Com programs must describe how labels and other forms of warning will be met.
• MSDS sheets must contain what type of specific information regarding the chemicals?
• For a 12" x 12" junction box with a depth of 6", what is the minimum length of conductors measured from where they emerge from the conduit?
• What minimum distance must be maintained for the top of a box when it is supported by conduits according to NEC?
• Which flexible cord type is required for connecting equipment with specific grounding and ungrounded conductor needs?
• Which of the following is not a requirement when performing electrical work?
• The damaged power cord on a 120-volt appliance can be replaced with a 6-ft length of flexible SJO cord not smaller than ___ AWG, connected to a 15-A branch circuit.
• With a 200-Amp branch circuit using a 6 AWG EGC, if 12 AWG wire is used instead, how will this affect the circuit breaker response time during a ground fault?
• After checking a receptacle with an ohmmeter, what should the meter indicate between specified points if the leads are correctly placed?
• The ampacity of each conductor of a 16/3 AWG multiconductor Type SPT-2 flexible cord is ___ amps.
• In a scenario with a 400-amp main breaker, how is the minimum grounding electrode conductor (GEC) determined?
• What type of connection is permitted between the ground wire and ground rod at the BCES parking lot light pole base?
• What is the minimum ampacity rating for a flexible cord connected to a 20 A branch circuit?
• Where 6 AWG/7-conductor Type G flexible cable is used to supply fastened-in-place utilization equipment with a metal enclosure, it has an ampacity of ___ amps.
• According to the NEC®, is it permissible to mount luminaires directly to a tree?
• Which flexible wiring method is permitted between a time clock and a panel?
• What is the smallest metal wireway that can be used for the service "gutter" for a 3Ø, 4-W feeder consisting of eight 600 kcmil conductors?
• What type of support is required for EMT conduit installations according to NEC?
• The smallest diameter of conduit allowed for width calculations in a pull box configuration is what measurement?
• Which element shall not support luminaires weighing over 6 lbs?
• Which of the following bends are permitted in a conduit run between two junction boxes per the NEC?
• What type of receptacle is used for a fryer connection in the BCES food service drawings?
• Which AWG ungrounded conductors are installed from BCES Transformer XE to Panel LE?
• For a load fed with 12 AWG conductors connected to a 20-amp breaker, the smallest EGC that can be installed is?
• In a panel with four conductors measuring 500 kcmil, which size of wire can be utilized as a main bonding jumper?
• At what distance is the space considered a Class I, Division 2 location in a spray booth?
• For a 3600 watt, 240-volt load supplied from a 2-pole, 30-amp breaker, how many amps does each ungrounded conductor carry?
• How many 1-hole straps are needed to secure 128' of EMT to a wall?
• In a 30-foot run of conduit containing one conductor, what is the maximum cross-sectional area that can be occupied by the conductor?
• What may happen if conductors are not spaced correctly in vertical runs?
• A 400-Amp switch using three 4/0 AWG conductors requires what minimum size EGC to the motor?
• A grounding conductor installed in a conduit with circuit conductors carries current ___.
• What is the minimum trade size difference required for two conduits to be supported from one another according to the NEC®?
• How many conduits are installed between the pad-mount transformer and the Texas New Mexico power distribution pole?
• If branch circuits from a 120/240 volt panel are run in the same conduit as circuits from a 277/480 volt panel, is it a Code violation?
• What is the smallest permitted GEC to the ground rod from a 400 amp main breaker panel not subject to physical abuse?
• What is the minimum number of bends that can be made when using the NEC® rules for conduit runs between fixtures?
• A 4-point saddle shown in Figure 208.45 has a total of how many degrees of bend?
• What is the minimum size of the EGC required between a 200-A safety switch and a motor with three 2 AWG conductors?
• What NEC reference permits the use of steel threaded rigid couplings with aluminum rigid metal conduit?
• Which of the following screw types is used for mounting a cover on Box I?
• How does properly tightening couplings and connectors in conduit affect the circuit breaker response time during a short-circuit?
• Which of the following is NOT a factor influencing the ampacity of a flexible cord?
• Which of the flexible cords or cables listed below can be used in dry locations?
• Under the National Electric Code, equipment grounding conductors must be sized based on what factors?
• What is the minimum number of straps required to support conduit between two enclosures spaced 123 feet apart?
• Which of the following driven electrodes can be used as an additional grounding electrode?
• For a service panel fed with four 3/0 AWG conductors, what is the smallest GEC that can be connected to building steel?
• When connecting a GEC to building steel, what must be considered regarding the size of the conductor?
• For a 120/240v 1-phase 3-wire service panel fed with three 1 AWG copper conductors, what is the minimum size GEC connected to building steel?
• The smallest equipment grounding conductor permitted to be installed with 1 AWG conductors fed from a panel is ___ AWG.
• When connecting a 3-phase air handler unit, is it necessary to install an Equipment Grounding Conductor with Flexible Metal Conduit?
• What is the minimum size conduit that can be used for home runs on BCES?
• Within sight, what is the maximum distance in feet from an object referenced in electrical standards?
• What conditions must be met for a 1900 box to be supported by EMT when it does not contain devices?
• What type of conduit body is identified as Type X?
• Employers must maintain copies of MSDS sheets in which location?
• In what class are areas with flammable gases classified under the NEC?
• What must be maintained when installing conduits through framing according to NEC® standards?
• What does the "W" suffix in any of the "S-type" flexible cords designate?
• What is the minimum size Grounding Electrode Conductor (GEC) required for a service with a 400-amp main breaker and specified conductors?
• What type of wire is allowable in the wiring method shown for feeding power into the box in the flexible setup?
• What does a cord marked with "H07RN-F" signify?
• When installing a GEC to the main water line from a 200-A main breaker, what is the largest size copper wire required?
• What is the classification of any spray area in direct path of spray operations?
• Is a lightning rod required to be installed at each BCES pole lighting standard and connected to the pole?
• What do qualified persons need to work safely with equipment and hazards?
• What is required of employers regarding a written hazard communication program?
• In major repair garages, the area within 18 inches of the ceiling is considered unclassified under what condition?
• The purpose of the Haz Com standard is to ensure that the hazards of all chemicals are what?
• What is the minimum calculated height of a pull box where all conductors enter the bottom and exit the right side?
• What is the permitted temperature rating for insulated conductors in residential wiring?
• What is the conduit size needed for home runs on BCES?
• What is the required distance between the lightning rods and the pole bases installed at BCES?
• When calculating space in a box, which factor contributes the most to the volume calculation?
• An expansion fitting is required in an 80' run of Schedule 40 PVC because it would expand ___ inches between winter and summer when temperatures change from -5°F to 100°F.
• What is the required ventilation rate in a ventilated pit at minor repair garages?
• A location that is 9 feet from a liquefied natural gas dispenser enclosure is classified as what location?
• When three 4/0 AWG conductors are used, the smallest EGC that can be installed is?
• Examples of raceways include which of the following?
• When calculating box volume allowances for EGCs, what is the volume allowance for a 12 AWG conductor?
• In a 120/240-volt, 1-phase, 3-wire service with a 125-A main breaker, what is the smallest main bonding jumper that can be installed?
• How is the power supplied to the 20 Qt mixer according to the BCES food service drawings?
• What is the significant factor for providing ventilation in a vehicle servicing area?
• What type of disconnecting means is not permitted for circuits leading to motor-fuel-dispensing equipment?
• For continuous operations, what voltage rating can be expected for SOO flexible cords used in a specific equipment configuration?
• What is a key characteristic of tap conductors in relation to their protection?
• If spray application equipment automatically stops when the exhaust ventilation fails, what descriptor applies?
• According to the NEC®, which conduit is required to have bushings?
• What is required for the equipment grounding conductor installed in a location with multiple circuit feeds to unique equipment panels?
• Which connectors can be used to splice 4 AWG conductors inside an LB type conduit body?
• What location designation describes the space within 915 mm of open containers containing flammable liquids?
• How is the minimum calculated height of a pull box determined with given measurements like 6" X 6"?
• Which of the following is an example of a raceway?
• Is the use of a 90° flex connector permitted at the box for a 4 square box flush mounted behind a sheetrock wall?
• What is the primary purpose of bonding metal equipment enclosures, metal raceways, and the grounded power supply together?
• Which of the following statements is true regarding the installation of luminaires?
• In a conduit configuration, if G is situated on the side that is adjacent to the box, where is it located?
• The grounded conductor between two panels carries current during ___.
• The smallest GEC that can be installed to building steel if there is one 4/0 AWG conductor is ___ AWG or kcmil.
• What component is necessary for the operation of an electric-discharge luminaire?
• What is the minimum standard size wireway required for installing 32 3 AWG, 48 2 AWG, and 18 3/0 AWG THHN/THWN conductors?
• Which piece of equipment is specifically covered under Article 300 when it's factory installed?
• What is the maximum distance permitted between support #5 and support #6 for MC cable in a wiring method?
• What does the "J" designation in "S-type" flexible cords indicate?
• In major repair garages servicing lighter-than-air fuel vehicles, the unclassified area below the ceiling is considered up to how many inches?
• What should employee training include regarding hazardous chemicals in the workplace?
• What type of connector is typically used for splicing conductors within an indoor junction box?
• How many 6 AWG THWN/THHN conductors can fit in a 10" x 10" wireway?
• The minimum size EGC run with three 350 kcmil conductors is what size?
• Which flexible cord type is suitable for outdoor use in wet locations?
• What is the primary purpose of Personal Protective Equipment when worn?
• In a 120/240-volt, 1Ø, 3-wire panel where each ungrounded conductor carries 16 amps, how many amps will the neutral in Conduit A carry?
• Conductors enclosed in Schedule 80 PVC are protected from which of the following?
• The maximum number of 2/0 AWG conductors allowed in a specific wireway is defined by which of the following calculations?
• When connected to a 1Ø piece of equipment that operates at 240 volts, a 12 AWG SJO flexible cord can carry ___ amps.
• What classification applies to the space below the floor level in a ventilated pit at minor repair garages?
• Which term describes a complete lighting unit that includes a light source and parts for positioning and connecting it to power?
• What must training on hazardous chemicals include regarding measures to protect employees?
• The primary purpose of bonding metal equipment is to ___.
• What type of cable is permitted for fixed wiring in aircraft hangars not in a Class 1 location?
• Which of the following is NOT a type of location where a luminaire can be installed according to NEC®?
• If a service panel is fed with four 1 AWG copper conductors, what is the smallest GEC that can be installed to building steel?
• In calculating width, the minimum dimension for a pull box containing a 5" conduit is what measurement?
• What must be ensured when installing a luminaire in a wet location?
• Which type of 2-inch raceway has the smallest cross-sectional area?
• What is a possible consequence of running different voltage circuits in the same conduit?
• When a conduit passes through an exterior wall and enters a panel mounted on the interior, are seals or plugs required?
• According to the BCES food service drawings, how is the fryer connected to electrical power?
• Where above ground exterior branch circuit conduits enter a building, what is required to prevent condensation according to the NEC®?
• What is the minimum size of the EGC that needs to be installed between a 400-A safety switch and a 3Ø motor using three 250 kcmil conductors?
• Where must the electrician provide a bonding jumper on the horizontal cable tray at the BCES project?
• A PAR lampholder in a weatherproof box can be supported by RMC when which conditions are met?
• Which of the flexible cables or cords listed below could be used to connect a piece of equipment that operates at 480 volts 3-ph?
• Article 300 applies to wiring that is part of which of the following?
• The maximum length of a flexible cord used to connect data-processing equipment to a branch circuit outlet box is ___.
• The minimum depth of a "4 square" box according to NEC® should be what measurement to avoid violation?
• Where a 250 kcmil copper GEC is subject to physical damage, it ___.
• What is the maximum number of 4/0 AWG THWN/THHN conductors that can be installed in an 8" x 8" gutter?
• Which types of lamps are used in an HID luminaire?
• What do "tap conductors" refer to in electrical systems?
• Which type of grounding electrode is NOT compliant with the NEC when combined with a water pipe?
• How many total degrees of bend does a 15° saddle represent?
• In the application of flexible metal conduit for an air-handling unit, what must be included to ensure safety?
• What is the minimum size grounding electrode conductor (GEC) to the ground rod required for a panel fed from a transformer with four 500 kcmil copper conductors?
• What is the smallest equipment grounding conductor permitted to be installed with 1/0 AWG circuit conductors connected to a 150-amp breaker?
• When might a bushing be required on a conduit installation?
• Which grade of receptacle is considered the highest in the electrical industry?
• Employers must ensure that employees are provided with what essential resources in the event of a spill or leak of a hazardous chemical?
• A run of EMT with offsets and saddles involves a total of how many degrees of bends?
• What is the standard ampacity for a 12 AWG conductor?
• True or False: A written Haz Com program requires a list of hazards and methods for informing employees of these hazards.
• Training on hazardous chemicals must include knowledge about which type of hazards?
• Are luminaires marked "Suitable for Wet Locations" permitted in an open porch of a one-family dwelling?
• What will the booster heater on the BCES project be connected through?