Deck 2: Wire, Raceway, and Box Sizing

Question 1

The environment around a conductor has no effect on the rate at which the heat produced, by current flow, is removed from the conductor.

Answer 1

False

Question 2

What is it called when all conductors are not energized at the same time?

Answer 2

This is called load diversity.

Question 3

Calculate the amount of heat produced as 10A flows through a conductor with a resistance of 5 $\Omega$ over a 2 hour period of time.

Answer 3

Heat = I² x R x t
Heat= (10A)²x5 $\Omega$ x2=1000 Watt-hours

Question 4

According to Article 314, where are boxes permitted to be installed?

Question 5

The length of a PVC rigid nonmetallic conduit changes with the ____________________.

Question 6

The length of the conduit body shall not be permitted to be less than ____________________ times the trade diameter of the largest conduit entering the conduit body.

Question 7

The minimum parallel conductor ampacity is calculated by dividing ____________________ by the product of the number of sets times the adjustment factor.

Question 8

When wires are all of the same size and type of insulation, the cross-sectional area of the wires will be identical

Question 9

List one of the three ways discussed in the text that insulation damage may occur.

Question 10

What is a nipple?

Question 11

A conductor ____________________ as current flows through it.

Question 12

The cross-sectional area of the conductors is not permitted to exceed ____________________% of the cross-sectional area of the nipple.

Question 13

Auxiliary gutters use different material than wireway.

Question 14

FMC stands for flexible metal conduit.

Question 15

____________________ is popular for use where flexibility is needed to connect raceway wiring systems to luminaires and equipment.

Question 16

A continuous load is one that operates for ____________________ hours.

Question 17

How is the cross-sectional area of a wireway determined?

Question 18

Determine the actual inside area of a wireway with dimensions of 10 in.by 10 in.

Question 19

PVC rigid nonmetallic conduit (RNC) is not resistant to corrosion from moisture and most chemicals.

Question 20

Usually, in the case of multiwire feeders and branch-circuits, the ____________________ conductor is not considered a current-carrying conductor