Chapter 4 Wiring Systems
99
Surface Metal Raceways — Article 386
Locations Allowed
Dry
Sizes
Unrestricted
Maximum Mounting Distance
See manufacturer’s installation
instructions
Surface Nonmetallic Raceways — Article 388
Locations Allowed
Dry
Sizes
Unrestricted
Maximum Mounting Distance
See manufacturer’s installation
instructions
from 1/2″ to 4″ wide. Surface-mount raceway is
constructed of steel, aluminum, or plastic.
Surface-mount raceway is mounted on
wall or ceiling surfaces only in dry locations
and where it will not be subjected to phys-
ical damage. Elbows, connectors, couplings,
and boxes are designed to be electrically and
mechanically continuous and compatible. It is
useful in existing facilities when appearance
is important and new wiring cannot be pulled
through walls.
Review Questions
Write your answers on a separate sheet of paper.
Do not write in this book.
1. Name fi ve key factors that determine
the wiring system used for a particular
installation.
2. True or False? When wiring with rigid metal
conduit, a grounding conductor is required.
3. When rigid conduit is cut, it is important
that it be __________ to remove any sharp
burrs that could damage the __________
during wire installation.
4. A __________ must be added to rigid
conduit to protect the wires that are pulled.
5. Intermediate metal conduit is commonly
sold in which of the following lengths:
A. 3′
B. 6′
C. 8′
D. 10′
E. 12′
6. A __________ bend is used when the con--
duit has to turn 90°.
7. Flexible metal conduit is also called
___________.
8. LFMC stands for ___________.
9. Armored cable is known as AC and
___________.
10. List three places where armored cable
cannot be used.
11. True or False? Electrical metallic tubing
cannot be used as an equipment ground.
12. Which article of the NEC outlines rules
regarding rigid metal conduit?
13. The following are types of nonmetallic-
sheathed cable: NM, NMC, NMS. Where is
each used?
14. Which article of the NEC outlines rules
regarding rigid nonmetallic conduit?
Know the Code
A copy of the NEC 2011 is required to answer these
questions.
1. What is the title of Section 250.118?
2. What does the informational note in Section
320.10 state?
3. True or False? Underground feeder can be
used as a service-entrance cable.