1. Objectives Provide Overview of Build Electric Systems
Learn Fundamentals of Electric Circuits

2. What do you need to know about Building Electric Circuits
Fundamentals
Basic principles of the grid
Terminology and basic principles of the building circuits
Where to learn about this:
- In Class
- Textbook Chapters 10 & 11, and later Chapter 13
- Reading assignment is complementary to the class material
- It is mandatory and will be checked in the course Quiz

3. What is the NEC? National Electrical Code
National Electrical Corporation
A kind of cookie
National Energy Code
A manufacturer of plasma televisions

4. Electrical Codes National Electrical Code (NEC) Focus on safety
Prepared by National Fire Protection Association
Part of the national and state building codes
Library website
Tao and Janis - Section 13.7
Focus on safety

5. AC DC Direct Current (DC) Alternating Current (AC)
Sign matters
Alternating Current (AC)
Switching polarity
Which are the following?
Photovoltaic solar cell
Automobile alternator
Household outlet
Outlet in ECJ
Battery
High voltage lines

6. AC terms Frequency, f [Hz] Resistor [Ω –ohm]
Wall outlet?
Fluorescent light?
Clock?
Electric resistance heater?
Resistor [Ω –ohm]
Capacitor (plates separated by dielectric)
Inductor (coil of wire)
Transformers

7. Why use AC? Easier to generate
7/10/2019
Why use AC?
Easier to generate
Able to use inductors and capacitors in meaningful way
Voltage changes much easier
Lower distribution losses
ARE 346N

8. Transformers Change - Voltage [E] and - Current [I]
Across a transformer
I1E1 = I2E2
Es/Ep = Ns/Np

9. Ref: Tao and Janis (2001)

10. Basic about Circuits
Ohm’s, Kirchov’s Laws, relations between current voltage resistance, ……
We need to master this:
as it defines basics for all electric systems (High voltage or Low voltage)
It is part of the FE exam that you will take soon or later

11. Fundamentals of Engineering (FE) Exam
The FE exam is the step in the process to becoming a professional licensed engineer (P.E.)
General FE exam:
Section 14. Electricity, Power, and Magnetism:
A. Electrical fundamentals (e.g., charge, current, voltage, resistance, power, energy)
B. Current and voltage laws (Kirchhoff, Ohm)
C. DC circuits
D. Equivalent circuits (series, parallel, Norton’s theorem, Thevenin’s theorem)
E. Capacitance and inductance
F. AC circuits (e.g., real and imaginary components, complex numbers, power factor, reactance and impedance)
G. Measuring devices (e.g., voltmeter, ammeter, wattmeter