Trades - Third Grading First Lesson

one-thousandth of a meter

millimeter

hundredth of a meter

centimeter

unit of measurement used to express resistance

ohm

instrument used to measure the insulation resistance of conductors or wire

megger

unit of measurement of electrical pressure or voltage

volt

unit of measurement of electrical current flow

amperage (Amps)

unit of measurement describing the amount of electric current passing a certain point at a particular time

ampere

a portion of a foot, which is an English unit of linear

inch

used to measure the diameter of magnetic wire

wire gauge

an istrument specially designed for measuring voltage

voltmeter

an electrical measuring instrument used to measure the voltage, the resistance, or the current of the cicuit.

multi-testert

the science of measurement

metrology

the prcess or result of determining the ratio of a physical quantity, such as a length, time, temp

measurement

measurement is an english word from the ____ mensura

Latin

the verb ___ through the middle french mesure

metiri

used to measure the diameter of wires/conductors in circular mils. It can measure small and big sizes of wires and cables

micrometer

a pocket size tool used to test the line wire or cicuit if there is current in it

test light

used to measure length, width, and thickness of short flat object and in sketching straight lines

ruler/foot rule

A ruler/rule is a tool used in, for example, geometry, technical drawing, engineering, and carpentry, to measure lengths or distances or to draw straight lines. Strictly speaking, the ruler is the instrument used to rule straight lines and the calibrated instrument used for determining length called a

measure

measuring tool used to measure the length of an object in centimeter and inches

pull-push rule

also called tong-tester, used to measure current flowing in a conductorm it is clamped or hanged in a conductor

clamp ammeter

an instrument used to measure the amount of electrical current intensity in a circuit

ammeter

unit of measurement using an ammeter

Ampere

used to measure electrical pressure or voltage of a circuit, connected across or parallel to the circuit

voltmeter

unit of measurement of voltmeter

volt

called multi-testerm is used to measure the voltage, resistancem and the current of a circuit. it is connected in a parallel or series with the circuit depending on what to measure

volt-ohmmeter

material used to cover electric wires which may be made from plasticm rubberm or asbestos

insulator

kilowatt is a unit of power which is equivalent to

1000w

wire or cord which provides path for current flow

conductor

A wire through which current flows

hot wire

commonly known as flexible non-metallic conduit or the “moldflex”

Corrugated Plastic Conduit (CPC)

accessories that are used to connect from boxes to conduits or raceways to the other boxes in the electrical system

connectors and adaptors

the quaity of electric current measured in ohms that resist the flow of current

resistance

implements used to modify raw materials for human use

tools

plastic conduits of raceways designed to be a channel of wire that are classified as PVC or CPC

Non-mettalic conduits

Metal raceways that was classified into RSC, IMC, EMC/EMT, FMC

Metallic conduits

are classified according to its uses on a specific project

materials

classified according to its function as per job requirement

tools

materials/tools: receptacles

materials

diagonal cutting pliers

tools

hammer

tools

switches

materials

These tools are made of steel hardened and tempered at the tip used to loosen or tighten screws with slotted heads

screw drivers

has a cross tip resembling a + sign and used to drive screws with cross slot heads

philips screw driver

wedge-shaped and resembles a - sign, used to drive screws with a single slot head

standard/flat screw drivers

could be in the shape of a screwdriver of a wrench, to drive screw with hexagonal slot head

allen screw driver/wrench

it comes in either standard or philips screw driver with a short stank or blade and a shorted handle used to turn screws in tight spaces

stubby screw driver

used in driving or pounding and pulling out nails

hammers

3 types of hammers

claw hammer, mallet, ballpeen hammer

used for cutting, twisting, bending, holding, and gripping wires and cables

pliers

pliers for electrical wire, usually used by linemen in doing heavy tasks

combination pliers(lineman’s pliers)

pliers used for cutting and holding fine wires. this can reach tight space of small opening where other pliers cannot reach and also used in making terminal loops of copper wires

long nose pliers

used for cutting fine, medium, and big wires and cables

side cutting pliers

used by linemen to remove insulation of wire and cables in low and high voltage transmission lines

electrician’s knife

used for removing insulation medium sized wires ranging from gauge #10 to gauge #16

wire stripper

a small drilling machine with a chuck sapacity of 1/4|| to 3/8||. it is used in making holes on metal sheets and concrete walls

portable electric drill

used to cut metal conduit and armored cable

hacksaw

a device that actsas a convenient source of electrical energy for surrent consuming appliances, where male plug is inserted

convenience outlet

a device inserted to a convenience outlet to conduct electric current. a flat cord is attached to it on one end and the other end is connected to a current consuming instrument of appliance

male plug

a device that connects and disconnecrts the flow of electric current in a cicuit

switch

types of switches

hanging, flush, and surface types

device that holds and protect the lamp, also called lamp sockets/receptacles

lamp holders

a protective device used to automatically blows and cuts the current when trouble in the circuit such as short circuit or overload occurs

circuit breaker

a circuit protective device that automatically blows and cut thecurrent when and over load or short circuit happens

fuse

metallic or plastic (PVC) material in which flush type convenience outlet and switch anre attached to

utility box

octagonal shaped electrical material where all the connections or joints aof wires are being done

junction box

electrical materials used to hold and anchor electrical conduits in its proper position

lampscm

a duplex stranded wire used for temporary wiring installation and commonly used in extension cord assembly

flat cord

used to attach metallic or nonmetallic conduit to the junction or utility boxes