Week three

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Overhead service conductors accessible only to pedestrian tragic must have a minimum ____ ft vertical clearance above finished grade

10

The ampere rating of any circuit breaker rated at _______ amperes or less and 1000 volts or less must be molded stamped etched or similarly marked into the handle or escutcheon area.

100

Individual household cooking appliances rated more than ___ watts (volt-amperes) can be debated by using demand factors

1750

The lighting load for residential dwelling units is ___ volt amperes (VA) per square foot.

3

A scale ruler is used in ____

Determining the location of outlets

Multiplying voltage by amperage produces _____

Volt-amperes (VA)

A one family dwelling service disconnecting means must have a minimum rating of ______

100 ampere 3-wire

Entrance cable must be supported within ____ in of every raceway or enclosure connection

12

Voltage between overhead conductors does not exceed ___ volts

300

The exact nameplate rating of the clothes dryer even if less than ___ volt amperes should not be used in load calculations

5000

The minimum size grounding electrode conductor is ___ AWG copper ( or 4 AWG aluminum)

6

A clothes dryer neutral load on a feeder can be calculated at ___%

70

A demand factor of ____% can be applied to the nameplate rating load of four or more fastened in place appliances.

75

Conductors must have a vertical clearance of at least ___ ft above the roof surface

8

In outdoor applications ____ grounding electrode inductors must not be installed within 18 inches of the earth

Aluminum (or copper-clad aluminum )

Panel boards include overcurrent devices as well as ______

Buses

Conductor sizes are expressed in American Wire Gage (AWG) or in ____

Circular mils

Working space illumination shall not be ______

Controlled by automatic means only

Main bonding jumpers and system bonding jumpers must be made of ____ or other corrosion-resistant material.

Copper

Panel boards shall be mounted in cabinets clout boxes or identified enclosures and shall be _____

Dead front

Type USE cable used for service laterals can ____

Emerge above ground at outside terminations

Splices in wire type grounding electrode conductors are acceptable only if by me and=s f irreversible compression type connectors (listed as grounding and bonding equipment or by the _____

Exoteric welding process

Circuit breakers and fuses can be connected in parallel provided they are _____

Factory assembled and listed as a unit

No derating is allowed when there are only one two or three appliances

Fastened-in place

Underground service conductors are defined as the underground conductors between the service point and the ________ to the service entrance conductors in a terminal box

First point of connection

The radius of the curve of the inner edge of any bend in service entrance cable must be at least ____ times the diameter of the cable.

Five

The ___ for each floor shall be computed using the outside dimensions.

Floor area

Concrete brick or tile walls are recognized as _______

Grounded

For the purpose of this load calculation the terms neutral and ___ are synonymous.

Grounded

____ are not included in calculating receptacle loads.

Heating and air-conditioning systems

All switchboards switchgear panel boards distribution boards and motor control centers must be located and must be protected from damage

In dedicated spaces

Fuses must be plainly marked by printing on or a label attached to the fuse barrel showing the following 1 ampere rating, 2 voltage rating, 3 _____ 4 "current limiting" where applicable and 5 the name or trademark of the manufacturer

Interrupting rating if other than 10,000 amperes

Each laundry branch circuit is calculated at _____

No less than 1500 volt amperes

Circuit breakers must have a voltage rating clearly marked ____ voltage

No less than the nominal voltage

The smaller of two or more ____ loads can be omitted as long as they are never energized simultaneously.

Noncoineicident

____ are not included in the calculated floor area of dwelling units

Open porches

Fuse holders for current-limiting fuses must not

Permit insertion of non current-limiting fuses

Type ____ cable can be foremd in a gooseneck and taped with a self sealing weather resistant thermoplastic.

SE

A feeder is defined as all circuit conductors between the ____ containing fuses or breakers that feed branch circuits

Service disconnecting means and the panelboard

Two to ____ circuit breakers or sets of fuses are acceptable as the overcurrent device to provide overload protection.

Six

Load calculations must be performed in order to determine the _____

Size and service of feeders

_____ must be included when calculating a dwelling unit service.

Small-appliance branch circuits

Although not stipulated in the NEC some local jurisdictions have adopted ___ for service conductors

Specific distance requirements

_____ is not an important piece of information to gather before performing load calculations.

The location of circuit breakers

The _____ including the strip heat and blower motor is necessary information for calculating loads.

Total volt- ampere load

Wire ways are ____ with hinged or removable covers used to house and protect electric wires and cables.

Troughs (sheet metal or nonmetallic)

A dwelling unit must have at least _____ small appliance branch circuits.

Two

The term appliance designates ___- and installed as a unit to perform specific functions

Utilization equipment commonly built in standardized types and sizes

Total volt ampere load for heating or air conditioning systems is calculated as the largest _____

Volt-ampere load after application of the demand factors

Horsepower ratings use be converted to _____ before they can be added to the load calculation form.

Volt-amperes (VA)

Cartridge fuses and fuse holders are classified according to ______

Voltage and ampere ranges

Service entrance and overhead service d=conductors shall be arranged so that ____

Water shall not enter the service raceways or equipment


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