NCCER Electrical 3 Module 2

A correction factor must be applied if the ambient temperature is above _____.

• 24°C

• 26°C

• 28°C

• 30°C

An acceptable method of identifying grounded conductors larger than No. 6 AWG is by
tagging them or marking them _____.

• Black

• Green

• White

• Blue

The color reserved for identifying the high leg of a three-phase, four-wire delta system is
_____.

• Orange

• Green

• White

• Grey

The physical properties of a No. 4/0 copper conductor would be found in _____.

• NEC Tables 310.15(B)(1) and (2)

• NEC Table 310.16

• NEC Chapter 9, Table 1

• NEC Chapter 9, Table 8

Correction factors for reductions due to high ambient temperatures are found in _____.

• NEC Tables 310.15(B)(1) and (2)

• NEC Table 310.16

• NEC Chapter 9, Table 1

• NEC Chapter 9, Table 8

If a conductor has a diameter of 80 mils, its diameter in inches is _____.

• 0.02"

• 0.04"

• 0.06"

• 0.08"

The square mil area of a conductor that is 0.250" on all sides is _____.

• 55,000 mils^2

• 62,500 mils^2

• 75,600 mils^2

• 80,200 mils^2

What is the total resistance of a two-wire circuit that spans a distance of 100' each way if the
resistance per 1,000' is 1.24 ohms?

• 0.112 ohm

• 0.248 ohm

• 0.312 ohm

• 0.480 ohm

To keep the voltage drop of a 277V circuit to a maximum of 3%, what would be the
MAXIMUM allowable voltage drop?

• 5.3V

• 8.3V

• 9.2V

• 10.4V

Which of the following MUST be considered when determining the size of the conductor
required to connect an electrical load to the source of supply?

• Permissible voltage drop

• Number of strands

• Frequency of load operation

• Type of conductor insulation