1. Power Distribution

FACTORS WHICH INFLUENCE RESISTANCE OF THE CONDUCTOR

* COMPOSITION OF THE CONDUCTOR * LENGTH OF THE CONDUCTOR *CROSS SECTION AREA OF THE CONDUCTOR *TEMPERATURE ​

GOOD INSULATORS:

* RUBBER * PORCELAIN * VARNISH * SLATE * GLASS * MICA * LATEX * ASBESTOS * THERMOPLASTIC * OILS * WAX

GOOD CONDUCTORS:

* SILVER * COPPER * ALUMINUM * NICKEL * BRASS * ZINC * PLATINUM * IRON * LEAD * TIN

Service Entrance & Feeder Wire - To Panel Box

100 AMPS (3 G)

General Lighting, Fans & Outlet / Receptacle Circuits

15 AMPS (14 G)

Service Entrance & Feeder Wire - To Panel Box

150 AMPS (1/10 G)

Appliances like Laundry, Bathroom & Kitchen Circuit

20 AMPS (12 G)

Service Entrance - From Utility Pole to Energy Meter

200 AMPS (3/10 G)

at the electrical service entrance to buildings, also at the lowest point of the drip loop of the building electrical entrance, and above areas or sidewalks accessible only to pedestrians, measured from final grade or other accessible surface only for overhead service conductors supported on and cabled together with a grounded bare messenger where the voltage does not exceed 150 volts to ground

3.0 m (10ft)

over residential property and driveways, and those commercial areas not subject to truck traffic where the voltage does not exceed 300 volts to ground

3.7 m (12ft)

Appliances it e.g. Dryer, Air-conditioning, Water Heater

30 AMPS (10 G)

for those areas listed in the 3.7 m (12 ft) classification where the voltage exceeds 300 volts to ground

4.5 m (15ft)

Feeder & Large Appliance Wire

40 AMPS (8 G)

over public streets, alleys, roads, parking areas subject to truck traffic, driveways on other than residential property, and other land such as cultivated, grazing, forest, and orchard

5.5 m (18ft)

Feeder & Large Appliance Wire

55 AMPS (6 G)

over tracks of railroads

7.5 m (24.5ft)

Minimum Clearance Requirement

<1000V

defined as the ability of conductor to carry without over heating

AMPACITY

fabricated assembly of insulated conductors enclosed in flexible metal sheath. Armored cable is used both in exposed and concealed work.

ARMORED CABLE

Also knowmm system used since 1857 predominantly in the United States and Canada for the diameters of round, solid, nonferrous, electrically conducting wire.

AWG

Are always used for hot wires. These wires may feed a switch or outlet and are often used as switch legs.

BLACK WIRES

These wires are usually pulled in conduit.

Blue and yellow

Electrical conductors greater than 8 mm²

CABLES

Is the term given to a heavily insulated wire

CORD

run from the substation to the end user location

Distribution lines

It is made of a metal that easily conducts electricity, usually copper, in a plastic sheath called an insulator.

ELECTRICAL WIRE

|s the medium through which electricity is carried to and through each individual home that uses electrical power.

ELECTRICAL WIRE

Made of Plastic, metal, fiber or fired clay and is available for special purposes

Electrical conduit

electrical piping system used for production and routing of electrical wiring

Electrical conduit

Distribution takes place through a system known as the _______ which is designed to keep power constantly on call so that it can meet demand. Power grid distribution lines can be above or underground.

Electrical grid or simply grid

Wires are used only for grounding. These wires will ground devices and shall be bonded to junction boxes and appliance connections for safety.

GREEN WIRES

means the wire is heat resistant.

H

This wire can withstand heat up to 194 degrees Fahrenheit.

HH

means that the wire is heat resistant and can withstand a higher temperature

HH

They do not let electrons flow very easily from one atom to another. Insulators are materials whose atoms have tightly bound electrons.

Insulators

are materials that have just the opposite effect on the flow of electrons.

Insulators

sheathed in spiral metal, but because of its expense it is not commonly used for interior applications.

MC armored cable

Is made from metal or plastic and contains a neutral wire, a "hot" wire (or two), and a grounding wire.

MULTI CONDUCTOR WIRES

The wires are color-coded to guard against connection errors.

MULTI CONDUCTOR WIRES

for the nylon coating that covers the wire insulation.

N

Factory assembled two or more insulated ——Solid i, . §i Copper conductors having a moisture resistant, flame retardant and non metallic material outer sheath.

NONMETALIC SHEATHED CABLE

used specifically for one or two family dwellings not exceeding 3- storey bldg

NONMETALIC SHEATHED CABLE

is a process which is used to move electricity from locations where it is generated to people who need it.

Power distribution

Is a single conductor or multiconductor assembly provided with or without an overall covering.

SERVICE ENTRANCE CABLE

Primarily used for services and of the types se and use.

SERVICE ENTRANCE CABLE

Are THW and THWN/THHN, which are protected by metal or plastic sheathing.

SINGLE CONDUCTOR WIRES

The wires themselves can be either solid or stranded. Solid-core wire produces the best connections, but its stiffness makes it more difficult than stranded wire to route through conduit.

SINGLE CONDUCTOR WIRES

Is that portion that runs from the utility lines to the point of attachment at the waterhead, then down an entrance cable or conduit to the meter.

Service Entrance

where the electric utility's maintenance responsibility ends and the building owner's responsibility begins

Service Entrance

transform voltage from high to low or low to high.

Substations

stands for thermoplastic insulated cable.

T

run between sub stations. They are higher and carry high voltages.

Transmission lines

In almost all cases, the power plant consists of a spinning electrical generator.

True

T or F. A good conductor must have extremely low resistance

True

T or F. a good insulator must also have extremely high resistance.

True

means that the wire is approved for damp and wet locations. This wire is also suitable for dry locations.

W

Indicate a neutral wire

WHITE AND GRAY WIRES

Are those electrical conductors which are 8 mm²

WIRES

means the cable is made of a synthetic polymer that is flame-retardant.

X

They also are used as switch legs to things like lights and fans.

blue

are generally used for travelers in three-way and four-way switch applications

blue

Most metals are considered to be good _____ of electrical current.

conductors

considered to be a conductor because it "conducts" the electron current or flow of electrons fairly easily. It is just one of the more popular materials that is used for conductors.

copper

The mineral composition of a conductor is essential factor in determining a ______.

good conductor

Neutral wires are _____, grounding wires are _____, and hot wires are any other color.

gray green

Indicate a neutral wire

neutral wires

Are also used for hot wires, switch legs (like to a ceiling fan), and are the second hot wire in 220-volt installations. Another useful application is the interconnect wire between two hardwired smoke detectors.

red wires

Is done by the friction between the flow of current and the conductor or insulator.

resistance

The longer the wire, the bigger the _____

resistance

the neutral and hot wires are insulated by a ____

thermoplastic material

Metals offers high resistance to high temperature

true

are generally used for switch legs. These control things like light, fans, and switched outlets.

yellow