Basic Electricity, Ohms Law and Power Formulas

ELECTRICAL CALCULATIONS: OHMS lAW

Basic Electricity, Ohms Law and Power Formulas SYMBOLIC:
E =VOLTS ~or~ (V = VOLTS)
P =WATTS ~or~ (W = WATTS)
R = OHMS ~or~ (R = RESISTANCE)
I =AMPERES ~or~ (A = AMPERES)
HP = HORSEPOWER
PF = POWER FACTOR
kW = KILOWATTS
kWh = KILOWATT HOUR
VA = VOLT-AMPERES
kVA = KILOVOLT-AMPERES
C = CAPACITANCE
EFF = EFFICIENCY (expressed as a decimal)

DIRECT CURRENT
AMPS= WATTS¸VOLTS I = P ¸ E A = W ¸ V
WATTS= VOLTS x AMPS P = E x I W = V x A
VOLTS= WATTS ¸ AMPS E = P ¸ I V = W ¸ A
HORSEPOWER= (V x A x EFF)¸746
EFFICIENCY= (746 x HP)¸(V x A)

AC SINGLE PHASE ~ 1°
AMPS= WATTS¸(VOLTS x PF) I=P¸(E x PF) A=W¸(V x PF)
WATTS= VOLTS x AMPS x PF P=E x I x PF W=V x A x PF
VOLTS= WATTS¸AMPS E=P¸I V=W¸A
VOLT-AMPS= VOLTS x AMPS VA=E x I VA=V x A
HORSEPOWER= (V x A x EFF x PF)¸746
POWERFACTOR= INPUT WATTS¸(V x A)
EFFICIENCY= (746 x HP)¸(V x A x PF)

AC THREE PHASE ~ 3°
AMPS= WATTS¸(1.732 x VOLTS x PF) I = P¸(1.732 x E x PF)
WATTS= 1.732 x VOLTS x AMPS x PF P = 1.732 x E x I x PF
VOLTS= WATTS¸AMPS E=P¸I
VOLT-AMPS= 1.732 x VOLTS x AMPS VA=1.732 x E x I
HORSEPOWER= (1.732 x V x A x EFF x PF)¸746
POWERFACTOR= INPUT WATTS¸(1.732 x V x A)
EFFICIENCY= (746 x HP)¸(1.732 x V x A x PF)