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Math for Electricians
BASIC MATH
Welcome and Introduction (9:43)
Introduction to Fractions (11:23)
Fractions to Decimals (6:48)
Understanding Percentages (16:33)
Increasing a number by a percent (8:18)
Understanding Reciprocals (9:00)
PEMDAS- Understanding the Order of Operations (13:18)
Squaring and Square Roots (10:49)
Understanding Metric Prefixes (9:00)
BASIC MATH- QUIZ
QUIZ- BASIC MATH
ADVANCED MATH
Isolating a Variable in an Equation (11:51)
Isolating a Variable in a Division Problem (12:10)
Solving an Equality (5:23)
Practical Usages of Algebraic Manipulation (14:15)
Common Geometric Formulas (14:08)
Converting Decimals to a Tape Measure (20:01)
Math Around A Triangle
Intro to Triginometry (3:21)
Review of Squares and Roots (7:35)
Squares and Roots Continued (9:00)
More about Squaring... How to Use your Calculator (9:57)
Pythagorean Theory Formula (9:44)
Pythagorean Theory Continued (11:04)
Pythagorean Theory- PRACTICE (11:04)
Triginomic Functions: SIN, COS & TAN Introduced (11:11)
Trig Functions Continued (12:03)
Determining the Angle Based on a Function (9:51)
The Process to Get the Angle- PRACTICE (10:59)
More Practice on Functions (7:43)
Intro to Other Helpful Formulas (14:03)
Helpful Formulas- Continued (8:47)
PRACTICE, PRACTICE, PRACTICE (9:56)
Vector Sum Addition (12:18)
ADVANCED MATH- QUIZ
QUIZ- ADVANCED MATH
INTRO TO OHM'S LAW AND ELECTRICAL MATH
Introduction to Electrician's Math (7:24)
What is Voltage? (11:33)
What are Amps? (8:59)
Understanding Amps Continued (7:05)
Ohms Law Introduced (6:24)
Understanding Resistance (6:18)
A Final Note on Resistance (1:58)
What's A Watt? (10:13)
Introduction to the Ohm's Law Wheel (9:46)
PIE & EIR (7:24)
Practice #1 (9:31)
Practice #2 (9:33)
Practice #3 (8:22)
Safety Considerations (11:01)
OHM'S LAW AND ELECTRICAL MATH- QUIZ
QUIZ- OHM'S LAW & ELECRICAL MATH
SERIES CIRCUITS
Components of A Circuit (8:36)
Series Voltage Rule (7:10)
Understanding Voltage Drops (9:48)
No Pressure After the Last Resistor??? (10:24)
Series Current Rule (7:48)
Series Resistance Rule (9:54)
Series Wattage Rule (5:30)
Intro to Circuit Analysis (12:09)
Series Practice #1 (7:39)
Series Practice #2 (7:49)
Series Practice #3 (7:23)
Series Practice #4 (6:55)
Series Practice #5 (7:43)
A Note on Rounding (7:28)
Series Practice #6 (11:45)
SERIES CIRCUITS- QUIZ
QUIZ- SERIES CIRCUITS
PARALLEL CIRCUITS
What is a Parallel Circuit? (11:00)
Parallel Voltage Rule (10:53)
Parallel Current Rule (6:30)
Parallel Resistance Rule (8:23)
Understanding the Product over Sum Method (7:23)
Product Over Sum- Continued (9:59)
Resistance- Practice #1 (7:51)
Resistance- Practice #2 (9:48)
Parallel Wattage Rule (6:28)
How to Analyze a Parallel Circuit (8:45)
Practice Example #1 (5:57)
Practice Example #2 (11:38)
Resistance- Practice #3 (6:22)
PARALLEL CIRCUITS- QUIZ
QUIZ- PARALLEL CIRCUITS
COMBINATION CIRCUITS
Combination Circuits Defined (9:43)
How to Solve for Total Resistance (11:50)
Example #1 (7:52)
Example #2 (9:34)
Example #3 (11:31)
Example #4 (7:27)
Example #5 (5:34)
Example #6 (8:07)
Solving Other Values in a Combo Circuit (16:27)
Solving Other Values- Part 2 (7:05)
Solving Other Values- Part 3 (7:11)
A Word About Proceeding (4:28)
COMBINATION CIRCUITS- QUIZ
QUIZ- COMBINATION CIRCUITS
MULTIWIRE CIRCUITS
Intro to Multiwire Branch Circuits (13:37)
Understanding the Current on the Neutral Wire (11:57)
The Dangers and the Benefits of a MW circuit (16:11)
Additional Dangers to Consider (16:31)
RACEWAY SIZING
A Couple Comments About the Remainder of this Course (6:31)
Rules about Boxes and Conduit Bodies (12:04)
Introduction to Conduit Fill Calculations (19:38)
Annex C- Conduit Fill with all the Same Size Conductors (8:42)
Intro to Chapter 9 Table- Conduit Fill Continued (14:07)
Determining the Total Area of MIXED Conductors (10:06)
What Do We Do With These Numbers? (14:16)
Deflection Calculations and Box Fill Calculations
Intro to Article 312 (12:02)
Deflection of Conductors (8:26)
Using Deflection Charts for Opposite Walls (10:57)
Using the Charts for Conductors NOT going through Opposite Wall (8:01)
Intro to Article 314 (15:40)
Box Fill Calculations When ALL CONDUCTORS are the Same (12:46)
Practice Calculations (13:38)
Counting Conductors- How to Add to Box Fill (17:22)
Clamp Fill and Support Fitting Fill (10:31)
Device or Equipment Fill Volumes (15:09)
How to Count Ground Conductors (14:45)
Box Fill Practice Problems (19:18)
Sizing Pull and Junction Boxes (16:36)
Practice Problems (8:35)
CONDUCTOR SIZING AND PROTECTION- Sizing Feeders
Intro to Article 240 (16:43)
Rules about Small Conductors (11:37)
Standard Ampere Ratings (9:41)
Supplementary Overcurrent Protection (10:48)
Location of OCP in a Circuit (8:11)
Understanding Taps and Tap Rules (20:39)
Feeder Tap Sizing- PRACTICE (9:22)
Outside Taps of Unlimited Length (6:33)
Location of OCP on the Premises (11:35)
Plug Fuses and Adapters (10:30)
Cartridge Fuses and Fuseholders (5:11)
Circuit Breakers as OCP (11:04)
Ampacity Calculations
Intro to Article 310 (21:35)
2- Single Family Dwelling Unit Service and Feeder Sizing-- 310.12 (16:53)
Learning to Read Table 310.16 (20:25)
Adjusting for Ambient Temperature (8:45)
Practicing Ambient Temperature Adjustments (14:16)
Ambient Temperature Correction- ROOFTOPS (10:52)
Ampacity Adjustments for Bundling Introduced (10:47)
Practice Derating Conductors Due to Bundling (9:21)
Practice Problems for Derating Ampacity due to Bundling (6:22)
Using Ampacity Adjustment Factors for both conditions (8:37)
RACEWAY SIZING & BOXFILL & AMPACITY CALCULATIONS- QUIZ
QUIZ- RACEWAY SIZING , BOXFILL & AMPACITY CALCULATIONS
MOTOR CALCULATIONS BASED ON ARTICLE 430
Intro and Overview to Article 430 (16:06)
Familiarization of Motor Starter Components (14:32)
Understanding Overcurrent Conditions (20:47)
Understanding What the Different Parts of 430 Govern (14:04)
Understanding FLA, FLC and LRC (3:33)
Determining Ampacity and Motor Rating 430.6 (9:43)
Introduction to The Tables (17:49)
Practice Choosing and Reading The Tables (15:48)
Determining the Highest or Lowest Rated Motor 430.17 (12:11)
Determining the Ampacity of Motor Conductors- SINGLE MOTOR- 430.22 (14:28)
Practice Solving Single Motor Ampacities (10:01)
Non Continuous Duty- SINGLE MOTOR (17:25)
Practice Using Table 430.22 E (15:26)
Calculating for Multiple Motors (11:33)
Practice Calculating Multiple Motor Ampacities (9:11)
Which Parts Govern Which Components (8:57)
Intro and Overview of Part 3 (11:17)
Understanding Part 3 Continued (10:34)
Calculating OLP for Continuous Duty Motors (13:49)
Practice Continued (15:29)
Review and Practice Continued (11:29)
Alternative OLP Methods (11:05)
When Do you use Paragraph C for Overload Protection Calculations (15:25)
Understanding Part 4 and Part 5 (17:00)
Individual Motors Branch Circuit Protection (16:45)
Practice Calculating Short Circuit Protection (8:32)
Why is such a BIG breaker permitted (16:37)
Practice Sizing SC and GF Protection for Branch Circuits (12:11)
One More Practice.... Just for Fun (11:34)
Sizing Feeder Protection- Introduction (15:43)
Feeder Protection Practice Problem (4:28)
Feeder Protection When Non Motor Loads are Present (6:02)
Disconnecting Means (15:01)
Review of Article 430 (4:34)
MOTOR CALCULATIONS BASED ON ARTICLE 430- QUIZ
QUIZ- MOTOR CALCULATIONS BASED ON ARTICLE 430
VOLTAGE DROP CALCULATIONS AND CONSIDERATIONS
Introduction to Voltage Drop Calculations (6:07)
How to Calculate the Cross Sectional Area of a Conductor (22:27)
Calculating Resistance in Various Lengths of Conductors (21:07)
Understanding Table 9- AC Resistance in Conductors (22:55)
Calculating the Minimum Permitted Voltage (15:40)
Practicing VD Calculations (10:18)
Practice- Continued (11:11)
Determining the Minimum size Conductor (13:32)
Practice Circuits (10:11)
3 Phase Calculations (9:30)
VOLTAGE DROP CALCULATIONS AND CONSIDERATIONS- QUIZ
QUIZ- VOLTAGE DROP CALCULATIONS AND CONSIDERATIONS
Load Calculations- A Foundation in Article 220
Intro to Article 220 (14:40)
Introduction to General Lighting Loads 220.42 (14:29)
A look at Dwelling Unit Rules 220.41 (6:24)
Calculating for Other Loads 210.14 (13:31)
Dwelling Unit Loads Included in the Lighting Load (6:43)
Introducing Demand Factors (13:47)
Practicing Demand Factor Calculations (13:39)
Other loads to be calculated NOT in the General Lighting Portion (12:33)
Appliance Loads & Other NON lighting Loads (9:21)
Demand Factors for Clothes Dryers T220.54 (10:34)
Demand Factors for Household Cooking Appliances 220.55 (13:00)
Commercial Kitchen Demand Factors 220.56 (12:10)
Neutral Loads 220.61 (9:41)
Tying it all together (12:59)
Summary and Final Word (2:07)
FINAL EXAM- DO NOT OPEN UNTIL IN THE PRESENCE OF AN APPROVED PROCTOR
FINAL EXAM- DO NOT OPEN UNTIL IN THE PRESENCE OF AN APPROVED PROCTOR
2- Single Family Dwelling Unit Service and Feeder Sizing-- 310.12
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