testt
Service disconnecting means shall not be located in ___. Select one:
b.bathrooms
Refer to Figure 203.4. For a 277/480-volt, 3Ø, 4-wire service, the minimum clearance above the roof at is ___. Select one:
a. 18″
Using the standard calculation, the demand load for household electric ranges rated in excess of ___ kW is computed per NEC® Table 220.55. Select one:
b.1 3/4
What Article of the NEC® covers the volt-ampere rating of multioutlet assemblies? Select one:
b.220
Where it is impracticable to locate the service head above the point of attachment, the service head location shall be permitted no further than ___ from the point of attachment. Select one:
b.2′
Live vegetation, such as trees, may support overhead conductor spans. Select one:
b.False
Where required, drawings for feeder installations must be submitted before ___.
b.beginning of installation
For a one-family dwelling, the service disconnecting means shall have a rating of not less than ___ amperes, 3-wire.
c.100
About ___% of OSHA's workforce consists of field inspectors (compliance officers). Select one:
c.50
Ground-fault protection is required for a feeder disconnect if ___. Select one:
d.all of these
Service-drop conductors shall have ___.
a. sufficient ampacity to carry the load
When calculating the size of a service, signs shall be calculated at a minimum of ___ volt-amperes for each required sign circuit.
a.1,200
A unit load of ___ volt-amperes per square foot shall be used when calculating the lighting load of a restaurant. Select one:
a.1.5
OSHA provides ___ to small businesses to help them provide a safe environment for their workers. Select one:
a.education
The service equipment disconnect for a manufacturing building shall be installed at a readily accessible location either outside or inside ___ entrance of the service conductors. Select one:
a.nearest the point of
In general, a building or structure shall be supplied by only ___ service(s). Select one:
a.one
Per 220.43(B) in the NEC®, ___ VA must be allocated for the lighting track when determining the calculated load on the service where a 12′ length of lighting track is installed in the conference room in an office building. Select one:
b. 150
When a calculation results in a fraction of an ampere of ___ or more, the NEC® permits "rounding up" to the next ampere. Select one:
b.0.50
An overhead feeder is to be installed to a residential garage. The conductors are insulated and have a voltage of 120 volts to ground. This circuit does not pass over a sidewalk or driveway. What is the minimum height above the ground that must be maintained? Select one:
b.10 ft.
Each 480-volt, three-phase, wye-connected feeder disconnect with a minimum rating of ___ amperes is required to be ground-fault protected. Select one:
b.1000
The minimum feeder-circuit conductor size, before the application of any adjustment or correction factors, shall have an allowable ampacity equal to or greater than the noncontinuous load plus ___ percent of the continuous load. Select one:
b.125
The minimum number of 15-amp, 120-volt, lighting circuits required for a 12,000 sq. ft. multifamily dwelling is ___. Select one:
b.20
For an installation consisting of not more than two 2-wire branch circuits, the service disconnecting means shall have a rating of not less than ___ amperes. Select one:
b.30
Where buildings exceed 3 stories or 50 feet in height, overhead lines shall be arranged, where practicable, so that a clear space (or zone) of at least ___ feet wide will be left either adjacent to the buildings or beginning not over 8 feet from them to facilitate the raising of ladders when necessary for fire fighting. Select one:
b.6
When a conduit containing service entrance conductors runs beneath a building, what is the minimum depth of concrete required to cover a conduit for it to be considered "outside" the building?
b.6 in.
When calculating the size of a service, the dryer shall either be ___ volt-amperes or the nameplate rating, whichever is greater.
c. 5,000
Conductors on poles shall be separated by at least ___ where not placed on racks or brackets. Select one:
c.12 inches
Service conductors must be sized for not less than ___ percent of the continuous load plus 100 percent of the noncontinuous load. Select one:
c.125
Service conductors shall have a clearance of not less than ___ feet from windows, doors, or similar locations that open. Select one:
c.3
Refer to Figure 203.12. The fuses in the nail salon safety switch provide ___ protection for the ungrounded service conductors between the switch and the utility transformer. Select one:
c.overload
A service is to be built on the base support pole of a single-sided billboard. One branch circuit provides power to the lights and will be loaded to 6 amps. The minimum ampacity for the ungrounded service conductors is ___ amps. Select one:
e.15
When calculating the size of the required service, you should consult household electric clothes dryer demand factors given in Table ___. Select one:
e.220.54
The minimum demand for an electric clothes dryer in a residential load calculation is ___ watts. Select one:
e.5,000
A unit load of not less than ___ volt-amperes per square foot shall be included for storage spaces in other than dwellings. Select one:
a.1/4
What is the minimum demand load for general-purpose receptacles in an office building that has 150 receptacles? Select one:
a.18,500 VA
Since OSHA's inception, the rate of occupational injury and illnesses has been reduced by over ___ percent. Select one:
a.40
Which of the following requires that a GFPE device be installed? Select one:
a.480/277-volt, 3Ø, 4-wire switchgear with a 1000-A main breaker
The smallest aluminum service-drop conductors that can be installed for a service are ___. Select one:
a.6
Overhead service conductors shall not be smaller than ___ AWG copper.
a.8
The minimum size underground service-lateral conductor shall not be smaller than ___ AWG copper or ___ AWG aluminum. Select one:
a.8, 6
Article 210 applies to branch circuits, but branch-circuit calculations for the purpose of determining the size of a service or feeder are covered in ___. Select one:
a.Article 220
Overhead conductors for festoon lighting shall be supported by messenger wire in spans exceeding ___ feet.
b.40
A 240/120-V three-wire feeder is to be installed underground from a dwelling unit to a detached garage on the same property. The feeder will be fed from a 90-amp circuit breaker in the dwelling unit panelboard. The feeder will be installed in rigid PVC conduit to the garage. Which of the following best describes Code requirements for installation of this feeder? Select one:
c.It must have an equipment grounding conductor.
Feeders containing a common neutral shall be permitted to supply ___.I. 2 or 3 sets of 3-wire feeders II. 2 sets of 4-wire or 5-wire feeders Select one:
c.either I or II
Feeder and service-entrance conductors with demand loads determined by 220.82 are permitted to have the ___ load determined by 220.61. Select one:
c.neutral
Which of the following wiring methods is permitted by the NEC® for the service-entrance conductors for residences? Select one:
c.rigid polyvinyl chloride conduit (PVC)
The NEC® requires the ampacity of a feeder shall be equal to, or greater than ___. Select one:
c.the calculated load after demand factors have been applied
Overhead service conductors shall have a minimum clearance from final grade of 241/2 feet when installed over ___.
c.tracks of railroads
Reasonable efficiency of operation can be provided when ___ is taken into consideration in sizing the feeder conductors. Select one:
c.voltage drop
A 12′ length of lighting track is installed in the master bedroom of a one-family dwelling. Per NEC® 220.43(B), how many VA must be allocated for the lighting track when determining the calculated load on the service? Select one:
d. 900
Service entrance cables shall be supported by straps or other approved means within ___ of every service head, gooseneck, or connection to a raceway or enclosure. Select one:
d.1 ft
Laundry receptacle outlets are included in the residential load calculations at a value of ___ volt-amperes per circuit. Select one:
d.1,500
The point of attachment of the service-drop conductors to a building must not be less than ___ feet above finish grade. Select one:
d.10
The load for a required sign branch circuit shall be computed at a minimum of ___. Select one:
d.1200 VA
The NEC® allows ___ receptacle outlets to be connected on a 120-volt residential lighting or small-appliance branch circuit. Select one:
d.an unspecified number of
When using the optional calculation method for dwelling units, this method considers heating or A/C loads and ___ loads. Select one:
d.general
The small-appliance and laundry loads ___ be permitted to be included with the general lighting load and subjected to the demand factors provided in NEC® Table 220.42. Select one:
a.shall
Of the more than 36,000 inspections OSHA performed in FY2018 (Fiscal Year 2018), more than ___% were performed on construction sites. Select one:
b.50
The feeder conductor ampacity shall not be less than that of the service-entrance conductors where the feeder conductors carry the total load supplied by service-entrance conductors with an ampacity of ___ amperes or less. Select one:
b.55
It shall be permissible to apply a demand factor of ___% to the nameplate ratings of 4 or more fastened-in-place water heaters in a multifamily dwelling. Select one:
b.75
The minimum feeder load for a 40 foot long show window is ___ VA. Select one:
b.8000
All of the states use the federal OSHA program for safety enforcement in their states. Select one:
b.False
A 120/240-volt, 1Ø, 3-wire branch circuit is installed underground to serve receptacles and lighting in the parking attendant's "shack" at Park-and-Fly. The circuits are run from a panelboard inside the vehicle maintenance building. When the conduit arrives at the shack, it is permitted to be stubbed up into a ___.I. non-fused safety switch II. fused safety switch III. junction box Select one:
b.I or II only
Overhead branch circuit and feeder conductors shall not be installed ___ openings through which materials may be moved, such as openings in farm and commercial buildings, and shall not be installed where they will obstruct entrance to these building openings. Select one:b.beneath
b.beneath
Where a service mast is used for the support of service drop conductors, it shall be of adequate strength or be supported by ___. Select one:
b.braces or guy wires
When calculating loads to determine the size of a 120/240-volt 1Ø, 3-wire service, the lighting load in amps is calculated by ___ the lighting load in volt-amps by 240 volts. Select one:
b.dividing
Where installed in a metal raceway, all feeder conductors sharing a common neutral conductor shall be ___. Select one:
b.enclosed within the same raceway
Loads, such as heating and air conditioning, that do not operate at the same time are said to be noncoincident loads. While separate circuits must be designed to serve each load, when calculating service load only the ___ of two noncoincident loads needs to be included. Select one:
b.larger
For the calculations required in Article 220, the total area of an occupancy is determined from the ___ dimensions of the building or structure. Select one:
b.outside
Service conductors supplying one building shall not ___ of another building. Select one:
b.pass through the interior
Branch circuits and feeder conductors shall not be installed in the same ___ with service conductors.I. raceway II. cable III. enclosure
c. I & III only
A 120/208-volt, 3-ph, 4-wire feeder is installed underground to serve 120-volt convenience receptacles, 120-volt lighting, and a 208-volt 1Ø window unit AC/HTR in the parking attendant's "shack" at Park-and-Fly. The feeder is run from a 3-pole breaker in a panelboard that is located inside the vehicle maintenance building. One circuit will be required for the receptacles, one circuit for the lighting, and one circuit for the window unit. The feeder at the shack is permitted to be connected to ___. All spaces in the panel will be occupied by breakers.I. a 12-circuit MB panel II. a 6-circuit MLO panel III. a 24-circuit MLO panel Select one:
c. II or III only
Loads computed for dwelling unit ___ circuits shall not be permitted to be included with the general lighting load and subjected to the demand factors permitted in Table 220.42 for the general lighting load. Select one:
c. appliance
The NEC® specifies that the maximum number of receptacles that can be connected to a 15-amp, 120-volt branch circuit in a school is ___. Select one:
c.10
For a one-family dwelling, the service disconnecting means shall have a rating of not less than ___ amperes when served with a 120/240-volt, single-phase service. Select one:
c.100
Refer to Figure 203.4. For a 120/240-volt, 1Ø, 3-wire service, the minimum clearance at is ___. The overhead conductors are triplex cable and this area is accessible to automobiles but not trucks. Select one:
c.12′
For purposes of calculating a residential service, the general-purpose lighting load is calculated at ___ per square foot of area. Select one:
c.3 volt-amperes
The minimum number of 120-volt, 15-amp lighting branch circuits required for a dwelling that has 70 × 30 ft. of livable space is ___. Select one:
c.4
Using the optional calculation method, four or more separately-controlled electric space-heating units are calculated at ___% of their nameplate ratings. Select one:
c.40
Although not enforceable, a feeder conductor should be sized so that the maximum total voltage drop on both feeders does not exceed ___% to provide reasonable efficiency of operation.
c.5
Where permissible, the demand factor applied to that portion of the unbalanced neutral feeder load in excess of 200 amps is ___ percent.
c.70
For a feeder supplying household cooking equipment and electric clothes dryers, the maximum unbalanced load on the neutral conductor shall be considered as ___ of the load on the ungrounded conductors. Select one:
c.70%
When calculating the service-entrance conductors for a farm service, the second-largest load of the total load, shall be computed at ___%. Select one:
c.75
Service entrance cables, where subject to physical damage, shall be protected by any of the following ___.I. EMT II. IMC III. RMC Select one:
c.I, II & III
At 180 VA per outlet, how many outlets can be installed on a 20-ampere circuit (120 volt) if the circuit loading is to remain within its ratings? Select one:
d.13
If festoon lighting exceeds ___ feet, the conductors shall be supported by messenger wire. Select one:
d.40
For a single-family dwelling with a total of 3500 square feet of occupied area, the minimum number of 15-ampere lighting branch circuits is ___. Select one:
d.6
The smallest main breaker that can be installed in a 24-circuit service panel on a commercial building is ___ amps. Select one:
d.60
A feeder supplying a 5 kW wall-mounted oven and a 7 kW counter-mounted cooktop in a residence shall have a minimum demand factor of ___. Select one:
d.7.8 kW
Using the standard calculation, four or more appliances which are fastened-in-place in a one-family dwelling are computed at ___% of the total load for all appliances. Select one:
d.75
