Electrical units, amps and electrical wiring, wire gauge and AWG, electrical formulas and motors.
Maximum wire lengths vs. currents in the 12 volt electrical system of a car.
Maximum length of copper wire with 2% voltage drop.
Maximum current (amps) in a 12V electrical circuit vs. size (AWG) and length of wire.
Real, imaginary and apparent power in AC circuits.
The alternating current In an AC circuit is generated by a sinusoidal voltage source.
Electrical resistance in plain copper or aluminum wires.
Characteristics of all-aluminum conductors (AAC).
Typical electrical motor data like nominal current, fuse, start ampere, size of contactor and circuit breaker - for asynchronous induction motors.
American Wire Gauge (AWG) vs. cross sectional area converter.
Amp ratings vs. US AWG wire gauges.
AWG vs. diameter mil, circular mil, diameter in mm and area in mm2.
Capacitors and capacitance - charge and unit of charge.
Parallel and serial connected capacitor circuits.
Potential power and energy stored in capacitors.
Verifies that a product is designed to the appropriate standards according the European Machine Directive.
Calculate the maximum number of circles within a rectangle - can be used to calculate the numbers of pipes or wires in a conduit or similar.
The circular mil area (CM) unit denotes the cross-sectional size of a wire or a cable.
Maximum current in copper and aluminum wire.
Gauge, weight, circular mils and electrical resistance in copper wire.
The electric force acting on a point charge.
An electric current divider outputs a current that is a fraction of the input current.
The dielectric strength of a material is the ability to the material to act as an insulator.
Amps vs. cable size for fixed installations in buildings.
Online shareable electric circuit diagram.
Ohm's law and voltage drop in electric circuits.
Convert between single phase (120, 240 and 480 Voltage) and three phase (240 and 480 Voltage).
Electric heating of an object or mass - temperature change vs. energy supplied.
Calculate amps, hp and kVA for electrical motors.
Sizing of copper wire and transformers for three phase 230 & 460V electrical motors.
480V electrical motor wiring data - NEMA amps, starter size, HMCP size for motors ranging 1/2 to 500 hp.
Calculate electric motor efficiency.
IEC and NEMA torque classifications of electrical motors.
Electric motor output power and torque vs. rotation speed.
The physiological effects of electric shocks.
Calculate single and bunched electric wire cross-section area and diameter.
Maximum length of 240 V single phase electric wire with max. 2% voltage drop.
Electric resistance in wire made of Copper, Aluminum, Brass, Constantan, Nichrome, Platinum, Silver or Tungsten.
Voltage and current in series circuits.
Electric conductance is the ability of a element to conduct an electric current.
Full load amps in 120 and 240 volts electrical DC motors.
Description of NEMA electrical enclosures types.
Commonly used electrical formulas like Ohms Law and more.
Electrical inductance in serial and parallel connected inductors.
Slip is the difference between an electrical induction motor's synchronous and asynchronous speed.
Operating speed of an induction motor depends on the input power frequency and the number of magnetic poles in the motor.
Full load operating torque vs. break down, pull up and locked rotor torque.
Trade sizes and max. distance between conduit supports.
Electrical motors NEMA frame dimensions.
Full load amps for single and 3-phase 460 volts, 230 volts and 115 volts electric motors.
Heat loss from an electrical motor to the surroundings.
Electrical motors horsepower rating vs. their ampere rating.
Electrical motors NEMA temperature and insulation classes.
NEMA locked rotor indicating code letters for electrical motors.
Maximum electrical motor cable length vs. power.
NEMA frame assignments.
Calculate electric motors shaft power.
Copper wire gage and transformer size for single phase 230 volts electrical motors.
Speed of an operating electrical motor with load is lower than the synchronous speed (no load) of the motor.
The speed of electrical motors with 2, 4, 6 or 8 poles at 50 Hz and 60 Hz.
NEMA - electrical motor efficiency ratings.
Service factor - SF - is a measure of periodically overload capacity at which a motor can operate without beeing damaged.
Resistors in parallel and serial connections.
Definition of common electrical units - like Ampere, Volt, Ohm, Siemens.
EV Charging - AC vs. DC, single phase vs. three phase and power vs. voltage and amps.
Change in electrical potential between two points.
Abbreviations according the International Electrotechnical Commission (IEC).
Size of extension cords - full load ratings with 115 V.
Introduction to electro chemical series and corrosion of metals.
The eight - S1 - S8 - IEC duty cycles of operating electrical motors.
The Electro Magnetic Field - EMF - induced into a electric circuit.
Synchronous and full load speed of amplitude current (AC) induction motors.
Energy stored in a magnetic field.
Lighter and lower cost metal conduits.
IP - Ingress Protection rating is used to specify the environmental protection - or electrical enclosure - of electrical equipment.
Kirchhoff's current and voltage laws.
Energy consumption of lighting systems
Lights vs. power installations in common types of buildings and rooms.
Light sources and their color irradiation in degrees Kelvin.
The visible light produced by light sources.
National Electrical Manufacturers Association.
NEMA has established the four different designs A, B, C and D for electrical induction motors.
NEMA enclosure classifications versus IEC enclosure classifications.
NEMA enclosure standard for electrical motors.
Electrical insulation systems rated by standard NEMA classifications to maximize allowable operating temperatures.
Nema sized contactors or starters.
Electric resistance vs. temperature rise for Nickel-Chromium electrical heater wire.
The relation between voltage, current and electrical resistance.
Calculate AWG, mil, mm, CM or square mm.
Electromagnetism and formation of magnetic fields.
Increased voltage imbalance and decreased efficiency.
Output voltage with a potential divider.
DIN VDE power installation standards.
Color codes used in power wiring.
Properties of rechargeable batteries and accumulators.
Common materials and their relative permittivity.
Electric circuits and voltage at any point.
The reciprocal of electrical resistance is conductance.
Electrical resistance and resistivity.
Resistivity, conductivity and temperature coefficients for common materials like silver, gold, platinum, iron and more..
Color codes for fixed resistors - values and tolerances - online calculator.
Letter and digit codes to indicating resistor values.
Preferred number series for resistors.
Resistance, voltage and current in resistor parallel networks.
Rigid Aluminum Conduit dimensions.
Power equations for single phased electrical systems.
Calculate the number of small circles that fits into an outer larger circle - ex. how many pipes or wires fits in a larger pipe or conduit.
Types of soil and resistivity.
Imperial Standard Wire Gauge used with wire and sheet metal.
Full load amps, wire and conduit sizes for three phase electrical motors.
Inductive loads and power factors with electrical three-phase motors.
Electrical 3-phase equations.
Alternating voltage and induced electro magnetic field - e.m.f. - in a transformer.
A transient is a high voltage spike caused by an external or internal transient source
Typical voltages and frequencies used for domestic appliances in different countries.
Convert wire area from square mm to diameter mm.