1. Electricity is most commonly defined as the movement
of electrons from a negatively charged location
to a positively charged location

2. ELECTRICAL TERMS VOLTS aka ELECTROMOTIVE FORCE (EMF), POTENTIAL
I / R
VOLTS P
I / E
aka ELECTROMOTIVE FORCE (EMF), POTENTIAL
CAN BE COMPARED TO
THE PRESSURE IN A
WATER LINE

3. ELECTRICAL TERMS AMPERES aka AMPS, CURRENT CAN BE COMPARED TO
I / R
AMPERES P
I / E
aka AMPS, CURRENT
CAN BE COMPARED TO
THE FLOW RATE IN A
WATER LINE

4. THE TOTAL AMOUNT OF ELECTRICITY USED OR AVAILABLE
ELECTRICAL TERMS E
I / R
WATTS P
I / E
aka POWER
THE TOTAL AMOUNT OF ELECTRICITY USED OR AVAILABLE
VOLTS X AMPS = WATTS

5. MOST ELECTRICITY USED IS AC
ALTERNATING CURRENT
MOST ELECTRICITY USED IS AC
CURRENT FLOWS FIRST ONE WAY, THEN THE OTHER

6. ALTERNATING CURRENT
POSITIVE HALF CYCLE
NEGATIVE HALF CYCLE

7. ALTERNATING CURRENT
1\60 SECOND
1 HERTZ
1 CYCLE
FREQUENCY

8. ALTERNATING CURRENT PRODUCED BY: POWER PLANTS GENERATORS ALTERNATORS
DYNAMOS

9. AC POWER DISTRIBUTION

10. GROUNDING provides a path to earth for lightning
AC POWER DISTRIBUTION
SAFETY !
GROUNDING provides a path to earth for lightning

11. ELECTRICAL POWER DISTRIBUTION
SAFETY !
Bonding Wire
BONDING provides an alternate path to neutral

12. The Power Distribution System

13. DIRECT CURRENT
CURRENT FLOWS ALWAYS IN THE SAME DIRECTION

14. DIRECT CURRENT PRODUCED BY: BATTERIES DISSIMILAR METALS RECTIFIED AC
LIGHTNING
LEMONS
STATIC
EELS

15. RECTIFIED AC
RECTIFIED AC: COMUTATOR
DIODES
RECTIFIED AC
aka DC AC

16. AC/DC SUMMARY + + +

17. SERIES CIRCUITS

18. PARALLEL CIRCUITS

19. SERIES/PARALLEL CIRCUITS
3 VOLTS
2X AMPS

20. SOLENOIDS

21. RELAYS LARGE CURRENT SOURCE NO CURRENT IS FLOWING ANYWHERE
IN THE CIRCUIT
SMALL CURRENT SOURCE

22. RELAYS LARGE CURRENT SOURCE CURRENT IS FLOWING IN BOTH CIRCUITS
SMALL CURRENT SOURCE

23. RELAYS

24. RELAYS

25. CONTACTORS