MEP Exam Questions and Answers
100% Pass
Conductors - ✔✔consist of materials that conduct electric current, or the flow of
electrons
Two most common metal conductors - ✔✔copper, aluminum
Copper conductors - ✔✔Superior conductivity
Great tensile-strength
Great thermal-conductivity
Great thermal-expansion properties
Aluminum Conductors - ✔✔61 percent of the conductivity of copper
30 percent of the weight of copper
Less expensive when compared to copper conductors
Stranded Conductor - ✔✔A conductor composed of several strands of solid wire
wrapped together to make a single conductor.
Advantages:
- Flexible
COPYRIGHT © 2025 BY KATELYN WHITMAN, ALL RIGHTS RESERVED 1
, - Easier to Install
- Subject to repetitive motion
solid conductor - ✔✔whose electrons are free to move about
Advantages: protection against corrosion, ideally suited for outdoor application
Conductor Sizing - ✔✔Larger the number, smaller the size if it is a #, /0 is bigger, then
kcmil
Ungrounded Conductors - ✔✔Not connected to ground or a conductive body that
extends the ground connection
It is the "hot wire"
Carries the electric current to the load
It is Black, Red, Blue OR Brown, Orange, Yellow
One you would get shocked on
Neutral Wire (grounded) - ✔✔Intentionally grounded
Neutral wire
Completes the circuit by forming a return path for the current provided by the hot wire
Connected to an earth ground
Carries unbalanced portion of the load
It is White or Gray
Can get shocked on this one
Assume all hot wires need a neutral
COPYRIGHT © 2025 BY KATELYN WHITMAN, ALL RIGHTS RESERVED 2
100% Pass
Conductors - ✔✔consist of materials that conduct electric current, or the flow of
electrons
Two most common metal conductors - ✔✔copper, aluminum
Copper conductors - ✔✔Superior conductivity
Great tensile-strength
Great thermal-conductivity
Great thermal-expansion properties
Aluminum Conductors - ✔✔61 percent of the conductivity of copper
30 percent of the weight of copper
Less expensive when compared to copper conductors
Stranded Conductor - ✔✔A conductor composed of several strands of solid wire
wrapped together to make a single conductor.
Advantages:
- Flexible
COPYRIGHT © 2025 BY KATELYN WHITMAN, ALL RIGHTS RESERVED 1
, - Easier to Install
- Subject to repetitive motion
solid conductor - ✔✔whose electrons are free to move about
Advantages: protection against corrosion, ideally suited for outdoor application
Conductor Sizing - ✔✔Larger the number, smaller the size if it is a #, /0 is bigger, then
kcmil
Ungrounded Conductors - ✔✔Not connected to ground or a conductive body that
extends the ground connection
It is the "hot wire"
Carries the electric current to the load
It is Black, Red, Blue OR Brown, Orange, Yellow
One you would get shocked on
Neutral Wire (grounded) - ✔✔Intentionally grounded
Neutral wire
Completes the circuit by forming a return path for the current provided by the hot wire
Connected to an earth ground
Carries unbalanced portion of the load
It is White or Gray
Can get shocked on this one
Assume all hot wires need a neutral
COPYRIGHT © 2025 BY KATELYN WHITMAN, ALL RIGHTS RESERVED 2
