BSD-MOD 5

***electrical circuit***

it is a continuous loop

***electrical circuit***

It is the complete path traversed by an electric current which collectively defines an entire house wiring installation.

branch circuit

it is composed of the circuit conductors between the final over-current protective device and its outlets.

service mast

contains the wires that transfer power from the city's overhead power distribution system to your home

weatherhead

it is designed to prevent water from running down the wires into your service box (breaker box.)

service mast and weatherhead

create the entry point for electricity into your home.

Mast

supplied three wires, two of which (the insulated wires) each carry 120 volts and originate at the nearest transformer.

lateral

In some areas electricity enters from below ground as a ___________, instead of the overhead drop.

meter

measures the electricity consumed.

electric meter

It is usually attached to the side of the house and connects to the service mast.

main service panel

It is in the form of a fuse box or breaker box

main service panel

distributes power to individual circuits.

fuses and circuit breaker

protects each circuit from short circuits and overloads.

fuses and circuit breaker

It is used to shut off power to individual circuits while repairs are made.

electrical boxes enclose wire connections

According to National Electrical Code, all wire splices and connections must be contained entirely in a covered plastic or metal box.

receptacles (outlets)

provide plug-in acces to electricity.

1965

A 120 volt, 15 amp receptacle with a grounding hole is the most typical receptacle in wiring system installed after ______.

120, 15

A__ __volt,__ ____ amp receptacle with a grounding hole is the most typical receptacle in wiring system installed after 1965.

duplex receptacles

it has two plug-in locations

Switches

control electricity passing through hot circuit wires.

Switches

it can be wired to control light, fixtures, ceiling fans, appliances, and receptacles.

light fixtures

attach directly to a household electrical system. They are usually controlled with wall switches.

incandescent and fluorescent

What are the two common types of light fixtures.

grounding wire

it connects the electrical system to the earth through a metal grounding rod driven next to the house

***branch circuit***

defined as that part of an electric circuit extending beyond the last circuit breaker or fuse.

breaker box

The branch circuits start at the__________ and extend to the electrical devices connected to the service.

***branch circuit***

the last part of the circuit supplying electrical devices

household circuits

carry electricity from the main service panel, throughout the house, and back to the main service panel.

single circuit

Several switches, receptacles, light fixtures, or appliances may be connected to a ___

***hot wires, neutral wires***

Current enters a circuit loop on ***____*** __and returns__ along _____. These wires are color coded for easy identification. ___ are black or red, and __________ are white or light gray.

***grounding wire***

conducts current in the event of a ground fault and helps reduce the chance of severe electrical shock.

***overload***

if a circuit carries too much current

white neutral wires

In a household wiring system, this return path is provided by ________ that return current to the main service panel.

power pole transformer

From the service panel, current returns along the uninsulated neutral service wire to a _____

***grounding***

connects the home’s electrical system to the earth.

***grounding***

primary purpose is to help stabilize voltage fluctuations caused by lightning and other problems in the electrical grid.

***grounding***

provides a secondary return path for electricity in case there is a problem in the normal return path

***grounding***

it is accomplished by connecting a wire between the main service panel and a grounding electrode

buried copper‑coated steel

what is the most common grounding electrode?

*ufer ground*

Other grounding electrodes include reinforcing steel in the footing

5 ft

the grounding conductor can be connected to the interior metal water piping system if within ___ of the point of entry to the bldg.

**service entrance**

This is the portion of the supply conductors which extends from the street main duct to the switchboard of the building supply which comprises the conductor and equipment for delivering energy from the electricity supply system to the wiring system of the premises served.

**electric meter**

This measures the amount of electrical consumption in a building.

**feeder**

This refers to all circuit conductors between the service equipment/entrance and the final branch circuit overcurrent device.

main feeders

it extends its interior wiring from the service switch to the main distribution center or electric service equipment.

***100 watts***

According to the National Electrical Code, ***____****shall be the maximum load for each household lighting outlet*.

230V

According to the provisions in the Philippine Electrical Code (PEC), the standard nominal voltage is ____ for residential services.

80%

According to code, the ampere capacity or ampacity of the connected load shall not exceed ____ of the amperage capacity of the *conductor* and the overcurrent protective device.

***180 watts***

According to the Philippine Electrical Code, receptacle outlets shall be calculated at ***not less than _____*** for each single or for each multiple receptacle on one yoke.

125%

the provision from the PEC which states that a branch circuit conductor supplying a motor shall have an ampere capacity or ampacity not less than ______of the full load current.

100 amperes.

According to code, if the computed load exceeds 10000 watts, the conductor and the overcurrent protection shall be rated not less than _____

70%

For the neutral conductors, it is stated in the code that neutral conductors shall have an ampacity of not less than _____ of the ungrounded (live wire) conductor or two trade size smaller than the ungrounded conductor.

single-line diagram

a graphical presentation of the major electrical components showing the spatial relations between electrical components represented by electrical symbols.

single-line diagram

It typically depicts how electricity enters a structure from its service entrance to its circuits as represented by how they are connected in a panel box

fish tape

useful for installing cables in finished wall cavities and for pulling wires through conduit.

tool belt

keep frequently used tools within easy reach.

Electrical tapes

a variety of colors are used for marking wires and for attaching cables to a fish tape.

touchless circuit tester

it safely check wires for current and confirm that circuits are dead

plug-in tester

check receptacles for correct polarity, grounding, and circuit protection

multimeter

used to measure AC/DC voltage/current, resistance, capacitance, frequency, and duty cycle.

***Safety***

the primary concern of anyone working with electricity

Common sense

It can prevent accidents.

basic rule of electrical safety

*Always turn off power to the area or device you are working on*

***circuit index***

***Create a ______*** *and affix it to the inside of the door to your main service panel.* \n *Update it as needed.*

Underwriters Laboratories

use only UL-approved electrical part or devices. These devices have been tested for safety by ___

***penetrate walls or ceilings***

***Do not _____________*** *without first shutting off electrical power to the circuits that may be hidden.*

 

***never alter the prongs of a plug***

***_____________****to fit a receptacle. If possible, install a new grounded receptacle.* \n