How Building Wire is Sized

13995 CM

A person has a piece of wire that has 12 strands, each strand with a diameter of 118.3 mils. To determine the size of wire will require three steps. The first step is to calculate the circular mil area for each strand. What is the circular mill area of each strand? (Round the FINAL answer to the nearest whole number.) (Note: The answer calculated for this question will be used for additional questions.)

167940

A person has a piece of wire that is 12 strands of 118.3 mils diameter. What is the approximate size of wire? This is the second step in a three step process. You will need this answer for the next question. Second Step: Multiply circular mil area by number of strands.

AWG 3/0

A person has a piece of wire that is 12 strands of 118.3 mils diameter. What is the approximate size of wire? This is the third and final step in a three step process. Third Step: Use Chapter 9, Table 8 of the Code to locate size closest wire size. The AWG for a wire made up of 12 strands that is 118.3 mils diameter is ? .

49

How many strands of 10 AWG wire would it take to make a 500-kcmil cable?

8/310.106(C)

In general, all conductors ? AWG and larger, installed in a raceway, shall be stranded.

14 / 12 Table 310.106(A)

In general, the smallest size conductor permitted for 600 V is ? AWG copper or ? AWG aluminum or copper-clad aluminum.

circular-mil area

The ? of a conductor is defined as the diameter of the conductor in mils, squared.

86

The allowable ampacities in Table 310.15(B)(16) and Table 310.15(B)(17) are based on an ambient temperature of ? °F.

4/0

The largest size wire listed in wire gauge number is ?

200.6

There are no color coding requirements for grounded conductors found in the NEC.

last / feet

To find the approximate resistance of a given copper conductor, drop the ? digit from the circular mil area. The result is the number of ? per ohm.

mils

To find the area of a wire in circular mils, square the diameter expressed in ? .

True

True or False In reference to wire size, AWG stands for American Wire Gauge

2 Ω

Using the approximate resistance method, what is the resistance of 3,302 feet of 8 AWG copper wire that has a circular mil area of 16,510?

2.53 Ω

What is the resistance of 1,000 feet of No. 14 copper wire? Use given properties. Given: copper = 10.4 ohms per circular mil foot No. 14 wire circular mil area = 4,110 cmil

3,265 feet

What length of 12 AWG copper wire would be required to produce a resistance of five ohms? (Use the approximation method.)

The insulation might stiffen.

What might happen to thermoplastic insulation at temperatures colder than -10°C (+14°F)?

Rohms = K × Lfeet / ACM

Which formula determines the resistance of a conductor?

Acmils = dmils2

Which formula is used to find circular mil area?

two hundred and fifty thousand circular mils

Write out in words what 250 kcmil means.