Basic Electricity Flashcards
The current in a circuit is Directly proportional to the applied voltage and Inversely proportional to the circuit resistance?
OHMS LAW
Write MATH formula for OHMS LAW
I=E/R
I = current in amperes E= Voltage in volts R = Resistance/Pressure in Ohms
What widely used electrical wire is being used because Of what it’s made of and for its best in class conducting properties?
Copper
A group of more than 1 wire is a _________?
Cable
Wires are individually sheathed.
Conduit protects what?
Cable individual wires
The only wire not needing a protective plastic covering is the _________?
Negative
Wires carrying negative charge has no need for a plastic layer.
Besides color coordinating the wires between hot and neg, the wires size are color coded. For instance white wire equals #14, yellow #___, Red #____?
12
10
Neutral wire carry current at zero voltage?
Hot wire carrying current at full voltage?
Hot wire carrying current at full voltage?
Hot wire carrying current at full voltage?
Serves as a bonding pathway?
Serves as a bonding pathway?
White
Black
Red
White strip or mark Black
Green
Bare Copper
Wire Gauge
55 amps, 240 volts central air conditioner, electric furnace
40 amps 240 volts electric range, central air conditioner
30 amps 240 volts window air conditioner and cloths dryer
20 amps 120 volts light fixtures, receptacles micro oven
15 amps 120 volts light fixtures, receptacles
Lightly duty extension cords
Thermostats doorbell security Alarm
6
Gauge wires
Electricity is pressurized along hot wires. This pressurization is called what?
Voltage
Large wires carry a shit load of power “voltage” smaller Wires carry less. This is important, for electrical carrying capacity of wires is called?
Ampacity
Ok so electrically coming into the home is pressurized. However, electricity leaving the home is not and flows back out on what type of wire? True or false Does this wire where electricity is leaving carry voltage?
Neutral wires
False electricity leaving the home along neutral wires are not pressurized and this not carry voltage.
The the staff on the side of roof of home has a cable running from the Step Down Transformer to power home. This Step Down Transformer converts voltage to usable 120 volts for home use. What’s the pole off the side of roof home called?
Service Mast
What are the steps to electricity flowing through a persons home?
Incoming electricity passes through a meter first. This meter keeps a tally of how much electricity is being consumed. From there Electricity enters a service panel on side of home “breaker” and then electricity is distributed to all the circuits “switches” throughout the house. The service panel breaker has fuses or circuit breakers in case.
Homes built in the 1950s have 3 wires running from Step down transformer to home. Two wires are _____ and one is _____? You can combine these two wires to make how much voltage? The combining of these two wires run modern day appliances like?
2 wires hot 1 neutral 240 volts Microwave ovens Washer dryer Refrigerator