Article 110

Question 1

(T/F) Working space is required fro the back or sided of assemblies where all connections and all renewable or adjustable parts are accessible from the front

Answer 1

False

Question 2

(Working spaces) Condition 1 is measured from the equipment to what?

Answer 2

Insulated Material

Question 3

What does Article 110 cover?

Answer 3

Requirements for electrical installations

Question 4

(T/F) The NEC prohibits sprinklers from spraying water on electrical equipment

Answer 4

False

Question 5

(T/F) The working space of equipment can overlap the working space for other equipment

Answer 5

True

Question 6

Unless marked otherwise, what is the AIC for circuit breakers and fuses?

Answer 6

CB’s = 5,000

Fuses = 10,000 AIC

Question 7

Panelboards supplied by a 4-wire, delta-connected, three-phase system must have the high-leg conductor terminate to the _____ phase of a panelboard

Answer 7

B

Question 8

(T/F) If the code requires a disconnect to be lockable in the open position, the provisions for locking must remain in place whether the lock is installed or not

Answer 8

True

Question 9

In a high-leg system, the conductor with 208V to ground must be durably and permanently marked by an out finish _____ in color, or other effective means

Answer 9

Orange

Question 10

Electrical equipment must have a short-circuit current rating that permits the circuit protective device to open from what?

Answer 10

Short Circuit or Ground Fault

Question 11

Enclosures must be marked with what?

Answer 11

An enclosure-type number

Question 12

The footprint space of electrical equipment extending from grade to a heigh of ____ feet above the equipment must be dedicated for the electrical installation.

Answer 12

6

Question 13

(T/F) Sprinkler protection piping is permitted in the dedicated space

Answer 13

False

Question 14

(T/F) Electrical raceways and cables not associated with the dedicated space can be within the dedicated space. These aren’t considered “equipment foreign to the electrical installation”

Answer 14

True

Question 15

Service equipment, switchboards, switchgear, and panelboards, as well as motor control centers located indoors must have illumination located indoors controlled by ______ means.

Answer 15

Manual

Question 16

Conductor sizes larger than ______ are expressed kcmil (thousand circular mills)

Answer 16

4/0

Question 17

What is the current, in amperes, available at a given point in the electrical system called?

Answer 17

Available Short-Circuit Current

Question 18

(T/F) Copper and aluminum conductors can make contact with each other in a device even if the device isn’t listed or identified for that purpose

Answer 18

False

Question 19

The working space must be sufficient width, depth, and height to permit all equipment door to open _____ degrees

Answer 19

90

Question 20

The height of the working space in front of equipment isn’t permitted to be less than _____ feet, measured from the grade, floor, platform, or the equipment height, whichever is ______.

Answer 20

6.5 , Greater

Question 21

Is a dropped, suspended, or similar ceiling considered a structural ceiling?

Answer 21

No

Question 22

When the conductor material is not specified in a rule, the sizes given in the NEC are based on a _______ conductor

Answer 22

Copper

Question 23

The width of the working space must be a minimum of ____, but in no case less than the _____ of the quipment

Answer 23

30” , Width

Question 24

(T/F) Conductors aren’t required to be twisted together prior to the installation of a twist-on wire connector, unless specifically required in the installation instructions

Answer 24

True

Question 25

(Working spaces) Condition 2 is measured from the equipment to what?

Answer 25

Grounded Parts

Question 26

What does AIC stand for?

Answer 26

Ampere Interrupting Capacity

Question 27

Switches and receptacles marked _________ are designed to ensure a good connection through the use of a larger contact area and compatible materials

Answer 27

CO/ALR

Question 28

The standard for meter equipment required the high-leg conductor (208V to neutral) to terminate on the _____ phase of the meter socket enclosure

Answer 28

C (right)

Question 29

Equipment such as raceways, cables, wireways, cabinets, panels, and so on, can be located above or below electrical equipment, but must not extend more than ___ inches into the equipments working space

Answer 29

6

Question 30

The voltage rating of electrical equipment isn’t permitted to be less than the ________ voltage of a circuit to which it’s connected

Answer 30

Nominal

Question 31

Overcurrent protection devices such as circuit breakers and fuses are intended to ______ the circuit

Answer 31

Interrupt

Question 32

What does AIR stand for?

Answer 32

Ampere Interrupting Rating

Question 33

The NEC doesn't specify the termination location for the high-leg conductor in switch equipment, but the generally accepted practice is to terminate this conductor to the _____ phase

Answer 33

B

Question 34

Is an electrical equipment room or enclosure containing electrical apparatus controlled by a lock(s) considered accessible to qualified persons?

Answer 34

Yes

Question 35

Dedicated space ______ the footprint of the equipment from the floor to ____ feet above the equipment or to the structural ceiling (whichever is lower)

Answer 35

Equal ; 6

Question 36

(T/F) Working space is permitted for storage while not being worked on.

Answer 36

False

Question 37

Working space is measured from the enclosure _____

Answer 37

Front

Question 38

(Working spaces) Condition 3 is measured from the equipment to what?

Answer 38

Exposed Live Parts

Question 39

Live parts of electrical equipment operating at ____ to _____ between ungrounded conductors must be guarded against accidental contact

Answer 39

50V ; 1,000V

Question 40

Over current protection devices must have an interrupting rating at the _______ circuit voltage at least ______ to the current available at the line terminals of the equipment

Answer 40

Nominal ; Equal

Question 41

The "high-leg" conductor is also sometimes called what?

Answer 41

Wild leg, stinger leg, or bastard leg

Question 42

What is the reason copper and aluminum conductors shouldn't be in contact with each other?

Answer 42

A corrosion develops between them due to galvanic action which results in increased contact resistance

Question 43

The available short-circuit current is highest at what point in the electrical system?

Answer 43

Utility Transformer

Question 44

(T/F) Foreign systems can be located above the dedicated space if protection is installed to prevent damage to the electrical equipment from condensation, leaks, or breaks in the foreign systems

Answer 44

True