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National Electrical Code
Mike Holt NEC explaination, training and tips.
Electrical Engineering Reference
Formulas, schematics, circuits, online-calculators.
Electric Codes
Electrical Codes.
   Electrical Symbols
Electrical Symbols
Electrical & Electronic symbols - Analog symbols, Digital symbols, Circuit schematic symbols, Circuit symbols of electronic components, Electronic symbol index - Downloadable electronic symbols (for use in text document or drawings)
SmartDraw
Electrical Diagramming software w/tutorials to help learn to draw diagrams & schematics + an extensive collection of electrical symbols and templates.
CAD 126
Free Schematic circuit drawing program
   Electronic Formulas
BoWest.com
electrical formulas library
electrician toolbox
three phase transformer info
Free-ed.net
electronics education supersite
ifigure.com
electrical engineering calculators
Tutorials, Electronics
Electronics Tutorials.
Electronic Tutorials
Google Directory of Electronic Tutorials.
Electric
VLSI Design System is a complete Electronic Design Automation (EDA) System for circuit design (digital & analog) schematics.
Electronic Tutorials
Amplifiers, Receivers, Transmitters, Power Supplies, Antennas, Electronic Design, Test Equipment, Ham Radio.
PLC Tutor.
Theory of operation, Creating programs, Main instruction set, Numbers, Wiring, Communications.
Free PLC Simulation Software
"TRiLOGI" is the name of the ladder or ladder+BASIC programming software for the E, H and M-series of PLCs. The are several versions of the software available for the different PLC series.
PLC Simulation
PLC and Ladder Logic Simulations, Programmable Software Simulations, RsLogic PLC Simulator, LogixPro download or CD
     Electronic Calculators
Electrical Engineering Calculators
Ohm's Law, Voltage- Current- Resistance- Power, Capacitance- Frequency- Inductance, Resistance- Frequency- Capacitance, MOS calculator, 555 calculator, Semiconductor Database