Electrical NEC 2020

where equipment operating at 1000 volts, nominal, or less to ground and likely to require examination, adjustment, servicing, or maintenance while energized is required by installation instructions or function to be located in a space with limited access, and where equipment is installed above a lay-in ceiling, there shall be an opening not smaller than _________. 6 in x 6 in 12 in x 12 in 22 in x 22 in 22 in x 30 in

22 in x 22 in

a circuit breaker having an interrupting current rating of other than ________ shall have its interrupting rating marked on the circuit breaker 5,000a 10,000a 22,000a 50,000a

5,000a

"within sight from" means visible and not more than _________ ft distant form the equipment 10 20 25 50

50

tightening torque values for terminal connections shall be as indicated on equipment or in installation instructions provide by the manufacturer. an approved means shall be used to _________ the indicated torque value maximize adjust optimize achieve

achieve

article 200 provides the requirements for _________. identification of terminals grounded conductors in premises wiring systems identification of grounded conductors all of these

all of these

overcurrent protection shall not exceed __________. 15a for 14 AWG copper 20a for 12 AWG copper 30a for 10 AWG copper all of these

all of these

the standard ampere ratings for fuses include(s) _________. 1a 6a 601a all of these

all of these

_________ on equipment to be grounded shall be removed from contact surfaces to ensure good electrical continuity paint lacquer enamel any of these

any of these

the continuity of a grounded conductor shall not depend on a connection to __________. a metallic enclosure a raceway cable armor any of these

any of these

the __________ has the responsibility for deciding on the approval of equipment and materials manufacturer authority having jurisdiction testing agency the owner of the premises

authority having jurisdiction

where portions of cable raceways or sleeves are required to be sealed due to different temperatures, sealants shall be identified for use with ________, a bare conductor, a shield, or other components. low temperature conditions high temperature condtions a stranded conductor cable and conductor insulation

cable and conductor insulation

equipment and devices shall only be permitted within ducts or plenum chambers specifically fabricated to transport environmental air if necessary for their direct action upon, or sensing of, the ________ contained air air quality air temperature humidity

contained air

alternating-current circuits of less than 50v shall be grounded if supplied by a transformer whose supply system exceeds 150 volts-to-ground true false

false

listed liquidtight flexible metal conduit (LFMC) is acceptable as an equipment grounding conductor when it terminates in listed fittings and is protected by an overcurrent device rated 60a or less for trade sizes 3/8 through 1/2. true false

false

the NEC defomes a(n) "_________" as one who has skills and knowledge related to the construction and operation of the electrical equipment and installations and has received safety training to recognize and avoid the hazards involved inspector master electrician journeyman electrician qualified person

qualified person

reconditioned circuit breakers shall be listed as "reconditioned" and the original listing mark shall be _________. removed struck out replaced any of these

removed

where [portions of a cable raceway or sleeve are subjected to different temperatures and condensation is known to be a problem, the ________ shall be sealed to prevent the circulation of warm air to a colder section of the raceway or sleeve opening cable space raceway or sleeve

raceway or sleeve

in the NEC, the word(s) "__________" indicate a mandatory requirement shall shall not shall be permitted shall or shall not

shall or shall not

no conductor shall be used where its operating temperature exceeds that designated for the type of insulated conductor involved true false

true

section 300.22(c) applies to spaces not specifically fabricated for environmental air-handling purposes but used for air-handling purposes such as the space over a hung ceiling true false

true