Exam 11: Using Wire Tables and Determining Conductor Sizes

All insulations perform equally well in dry, damp, and wet locations.

The longer the conductor, the more _____ it will have.

The ampacities listed in Table 310.15(B)(16)  are based on an ambient temperature of _____.

When a conductor is very large it may become necessary to connect them in _____.

The National Electrical Code _____ contains tables dealing with conductors for general wiring.

The ambient air temperature considered in relation to a conductor ampacity is the temperature of the _____.

The ____________________ was standardized in 1857 and is used mainly in the United States for the diameters of round, solid, nonferrous electrical wire.

In the National Electrical Code , the current carrying abilities of conductors are called the _____.

There are two conductors, a red and a blue installed in metallic conduit. You are using a MEGGER to test for shorts. How should the two leads of the MEGGER should be connected?

The unit circular mil is equal to the _____.

If there are more than _____ conductors in a raceway, the ampacity of the conductors must be derated.

To test wire insulation, a special type of ohmmeter called a(n) _____ is used.

In the American Engineers Handbook , the standard temperature of material resistance is _____.

A wire that has a diameter of 162 mils has an area of _____ circular mils.

The ampacities listed in the tables are based on a specified ambient temperature. If conductors are to be operated in a different ambient temperature than the temperature specified, a(n) ____________________ factor must be applied.

A piece of wire that is one mil in diameter and one foot long is one mil-foot.

What is the nonconductive covering around a wire?

Materials that increase their resistance with an increase in temperature have a _____ coefficient of temperature.

The insulation used on conductors cannot operate in all possible temperatures. The highest allowable temperature is called the _____ temperature.

There are two conductors, a red and a blue installed in metallic conduit. You are using a MEGGER to test for grounds. How should the two leads of the MEGGER should be connected?