Menu
- About Us
- Contact Us
- Testimonials
- Continuing Education
- Approved Courses
- Course Login
- Electrical Engineer PDHs
- ICC Approved Courses
- Live CEU Seminars
- NABCEP CEUs
- Electrical Engineering
- Electrical Engineer PDHs
- Engineers Library
- Exam Preparation
- Florida State Exam Prep
- Inspector (Electrical)
- Journeyman Exam Prep
- Masters Exam Prep
- State Licensing Boards
- Free Stuff
- Charts & Calculators
- Code Forum
- Find an Expert
- Find a School
- Graphic of the Day
- Job Board
- Links
- NEC
- Newsletters
- Publications
- Podcasts
- Technical
- Videos
- Instructors & Schools
- Apprenticeship
- Capacitor Login
- ISBNs
- Training Solutions
- Request a Quote
- Products
- Best Values
- Books & DVDs
- Clearance
- Seminars
- CEU Seminars
- Seminar Schedule
Free Charts and Calculators
FREERESOURCES
- AFCI History Chart
- Design and Research Charts - Powersoft Engineering LLC
- Electrical Formulas - Spreadsheets and more!
- Generator Sizing Spreadsheet - Mike Holt
- GFCI History Chart
- Important Electrical Equations
- Motor Wire and Protection Chart [PDF 47.4 KB]
- Ohm's Law Poster 8.5x11 [PDF 3.3 MB]
- Ohm's Law Poster 16x20 [PDF 23.7 MB]
- Ohm's Law Poster 24x36 [PDF 51.3 MB]
- Ohm's Law Poster 36x48 [PDF 79.3 MB]
- Short Circuit Calculations
- Transformer Chart
- Voltage Drop Calculator [Excel™ File]
