ES3J | Questions with 100% Verified Answers | Latest Update
2026/2027
Question: A frequency that has been amplified to four frequencies is called
Answer: frequency multiplex
Question: Class 1 circuits are allowed a minimum wire size of
Answer: 18 awg
Question: According to the NEC class III circuits are allowed a minimum wire size of?
Answer: 18 awg
Question: Class three circuits are all allowed a minimum of
Answer: 18 awg
Question: On transmitting stations what is the smallest size copper grounding conductor that would be
permitted?
Answer: 10 awg
Question: What is the minimum size grounding conductor for communication circuits?
Answer: 14 awg
Question: interconnections on a solar photovoltaic system?
Answer: 18 awg
Question: You will find difficulty using UF cable as a ground because?
Answer: Trenching and corrosion damage
Question: What type of wire is to be used for common direct burial?
Answer: USE
Question: Type CMUC communications wires and cables shall be permitted to be installed where?
Answer: under carpet
Question: Interconnecting cables under raised floors that support information shall be type?
Answer: DC
Question: What type of cable is permissible on module interconnections within a photovoltaic array that are
exposed to the weather?
Answer: USE-2
Question: moisture and heat resistance wire is
Answer: THW
Question: Which of the following is the best choice for risers in CATV or radio distribution systems?
Answer: CMR or CATVR
,Question: Type OFNG and OFCG shall be listed as being suitable for general purposes use with the exception of
risers and plenums and shall be listed as being?
Answer: Resistant to the spread of fire
Question: In a class II power limited circuit what is the cable of choice for a plenum?
Answer: CL2P
Question: An electrical conduit buried 18" below grade shall have warning tape at how many inches
above the conduit?
Answer: 12 inches
Question: What is the minimum required separation between communication cables and lighting conductors?
Answer: 6 ft
Question: Landscape lighting buried a minimum of
Answer: 6 inches
Question: Raceways cable trays and other wiring methods for intrinsically safe system wiring shall be identified
with permanently affixed labels with the wording intrinsic safety wiring at what maximum spacing?
Answer: 25 ft
Question: All of the following are acceptable as a ground except?
Answer: 10 ft gas pipe
Question: Ariel Communication cable should not be connected to same arm as high voltage, and should
maintain a minimum separation of
Answer: 12'' from high voltage.
Question: minimum length of a grounding rod
Answer: 8 ft
Question: Coax entering a building should be grounded within
Answer: 30' of entrance.
Question: What is the color of an equipment ground wire?
Answer: Green with yellow stripes
Question: Which of the following affects the resistance of a conductor?
Answer: material
Question: A current that leaves its intended path and returns to the source bypassing the load causes the
circuit to be?
Answer: shorted
Question: the grounding bus shall be connected?
Answer: Through the green colored antiquated conductor
, Question: Cable is being installed in an area that is above a suspended ceiling that contains completely
enclosed air ducts. What term or word identifies this location?
Answer: accessible
Question: According to the NEC electrical equipment may not be mounted on concrete, cinder block, or brick
walls with?
Answer: wooden plugs
Question: What is the function of the green wire in a manufactured home?
Answer: grounding connection
Question: Where are splices allowed in conductors in surface mount raceways if they do not have removable
covers?
Answer: only in junction boxes
Question: Insulated conductors of #6 or smaller intended for use as grounding conductors in a circuit must be
either of the following colors?
Answer: White, gray, or have three continuous white stripes on other than green insulation
Question: What percent of fill is allowed in a conduit with three conductors?
Answer: 40%
Question: Which of the following is an acceptable marking method for the grounding conductor on a grounding
type receptacle?
Answer: A green colored hexagon, headed screw or nut
Question: What is the maximum allowable output of a class I power limited circuit?
Answer: 1000 VA
Question: Supply circuits and interconnecting cable under raised floors supplying information technology
equipment in a data processing room must be?
Answer: accessible
Question: The best type of connection to electrode rod ground are
Answer: listed clamps
Question: Over head runs should be no less than
Answer: 8 feet about the roof tops
Question: On a multi conductor cable what is the outer layer called?
Answer: jacket
Question: Telecom wire grounded on each end what is the electrical path called?
Answer: ground loop
Question: Locations where easily ignitable fibers are stored are?
Answer: Class III division II
2026/2027
Question: A frequency that has been amplified to four frequencies is called
Answer: frequency multiplex
Question: Class 1 circuits are allowed a minimum wire size of
Answer: 18 awg
Question: According to the NEC class III circuits are allowed a minimum wire size of?
Answer: 18 awg
Question: Class three circuits are all allowed a minimum of
Answer: 18 awg
Question: On transmitting stations what is the smallest size copper grounding conductor that would be
permitted?
Answer: 10 awg
Question: What is the minimum size grounding conductor for communication circuits?
Answer: 14 awg
Question: interconnections on a solar photovoltaic system?
Answer: 18 awg
Question: You will find difficulty using UF cable as a ground because?
Answer: Trenching and corrosion damage
Question: What type of wire is to be used for common direct burial?
Answer: USE
Question: Type CMUC communications wires and cables shall be permitted to be installed where?
Answer: under carpet
Question: Interconnecting cables under raised floors that support information shall be type?
Answer: DC
Question: What type of cable is permissible on module interconnections within a photovoltaic array that are
exposed to the weather?
Answer: USE-2
Question: moisture and heat resistance wire is
Answer: THW
Question: Which of the following is the best choice for risers in CATV or radio distribution systems?
Answer: CMR or CATVR
,Question: Type OFNG and OFCG shall be listed as being suitable for general purposes use with the exception of
risers and plenums and shall be listed as being?
Answer: Resistant to the spread of fire
Question: In a class II power limited circuit what is the cable of choice for a plenum?
Answer: CL2P
Question: An electrical conduit buried 18" below grade shall have warning tape at how many inches
above the conduit?
Answer: 12 inches
Question: What is the minimum required separation between communication cables and lighting conductors?
Answer: 6 ft
Question: Landscape lighting buried a minimum of
Answer: 6 inches
Question: Raceways cable trays and other wiring methods for intrinsically safe system wiring shall be identified
with permanently affixed labels with the wording intrinsic safety wiring at what maximum spacing?
Answer: 25 ft
Question: All of the following are acceptable as a ground except?
Answer: 10 ft gas pipe
Question: Ariel Communication cable should not be connected to same arm as high voltage, and should
maintain a minimum separation of
Answer: 12'' from high voltage.
Question: minimum length of a grounding rod
Answer: 8 ft
Question: Coax entering a building should be grounded within
Answer: 30' of entrance.
Question: What is the color of an equipment ground wire?
Answer: Green with yellow stripes
Question: Which of the following affects the resistance of a conductor?
Answer: material
Question: A current that leaves its intended path and returns to the source bypassing the load causes the
circuit to be?
Answer: shorted
Question: the grounding bus shall be connected?
Answer: Through the green colored antiquated conductor
, Question: Cable is being installed in an area that is above a suspended ceiling that contains completely
enclosed air ducts. What term or word identifies this location?
Answer: accessible
Question: According to the NEC electrical equipment may not be mounted on concrete, cinder block, or brick
walls with?
Answer: wooden plugs
Question: What is the function of the green wire in a manufactured home?
Answer: grounding connection
Question: Where are splices allowed in conductors in surface mount raceways if they do not have removable
covers?
Answer: only in junction boxes
Question: Insulated conductors of #6 or smaller intended for use as grounding conductors in a circuit must be
either of the following colors?
Answer: White, gray, or have three continuous white stripes on other than green insulation
Question: What percent of fill is allowed in a conduit with three conductors?
Answer: 40%
Question: Which of the following is an acceptable marking method for the grounding conductor on a grounding
type receptacle?
Answer: A green colored hexagon, headed screw or nut
Question: What is the maximum allowable output of a class I power limited circuit?
Answer: 1000 VA
Question: Supply circuits and interconnecting cable under raised floors supplying information technology
equipment in a data processing room must be?
Answer: accessible
Question: The best type of connection to electrode rod ground are
Answer: listed clamps
Question: Over head runs should be no less than
Answer: 8 feet about the roof tops
Question: On a multi conductor cable what is the outer layer called?
Answer: jacket
Question: Telecom wire grounded on each end what is the electrical path called?
Answer: ground loop
Question: Locations where easily ignitable fibers are stored are?
Answer: Class III division II
