2. Learning Outcomes:
1.Prepare electrical materials
and tools for the task;
2.Identify common electrical
tools and equipment; and
3.Identify common electrical
materials.
3. Importance of
electrical
installation
and
maintenance
One of the most primary and significant benefits of electrical
installation maintenance is safety. If you hire a professional it
will ensure you stay safe. Nobody wants to stay in a home where
there is no electrical maintenance.
The electrical wires are more prone to damage if there are
humidity and moisture. By maintaining a routine you can
eliminate the danger of shock.
The second most important benefit is that it is safe for your
expensive electrical appliances. Further, it ensures the regular
supply of electricity to all appliances. Also, it works with the
quality, lifespan, and performance of your appliances.
The third most significant benefit is that it can reduce energy
costs. If all your electrical gadgets are working efficiently they
will consume less energy.
6. Types of Screwdrivers
• The blade tip is wedge-shaped
• and resembles a negative (-)
• sign. This is used to drive
• screws with a single slot head.
7. This has a cross tip resembling a positive (+)
sign. This is used
to drive screws with cross slot
heads.
B. Philips Screwdriver
8. C. Stubby Screwdriver
• This comes in either
Standard or Philips
screwdriver with short
shank or blade and a
shorted handle used to
turn screws in tight
spaces where a
standard screwdriver
cannot be used.
9. D. Allen Screwdriver/Wrench
• This could be in the shape of a
• screwdriver or a wrench. Its
• function is to drive screws with
• hexagonal slot heads.
10. HAMMERS
• These are tools used in
driving or pounding and
pulling out nails. They are
made of hard steel, wood,
plastic, or rubber.
11. A. Claw Hammer
• Is a hammer with one side of the head split
and curved, used for extracting nails.
12. B. Mallet (Rubber
head)
• Has rubber head and is
usually used to knock wooden
pieces together, or to drive
dowels or chisels.
Uses Of Rubber Mallet
•Form sheet metal since they are not likely to
cause dents
•Shift panels of drywall into place
•Tapping bricks or pavers into the sand
•Gently tap ceramic or stone tiles into place
•Tighten up joints in luxury vinyl tile or in
laminate flooring
•Tap carpeting onto tack strips
•Close paint can lid without damaging the can
or lid
•Snug up joints in PVC pipe
13. C. Ball-peen Hammer
• It is also known as machinist’s hammer used in metalworking.
Making
Making knife and
sword. The ball peen
hammer is used in
metal fabrication
because it is excellent
in shaping the material
as desired by the user.
Removing
Removing Dents. Ball
peen hammers have
proven to be excellent
tools in smoothing out
dents as they work
efficiently on the metal
being repaired and
leave no marks on the
...
Striking
Striking punches.
During metalworking
and woodworking, a
ball peen hammer is
the most appropriate
tool to apply in striking
chisels and punches.
14. 3. PLIERS
These tools are made
from metal with insulators in
the handle and are used for
cutting, twisting, bending,
holding, and gripping wires and
cables.
15. A. Combination Pliers
(Lineman’s
Pliers).
• This is used for gripping,
holding, and cutting
• electrical wires and cables and
• even small nails. They are
• usually used by linemen in
• doing heavy tasks.
16. B. Side Cutting
Pliers
• This type of pliers is used for
cutting fine, medium, and big
wires and cables.
17. C. Long Nose Pliers
• This is used for cutting
and holding fine wires.
This can reach tight
spaces or small openings
where other pliers cannot
reach and is also used in
making terminal loops of
copper wires.
18. 4. WIRE STRIPPER
• This is a tool used for removing
insulation of medium-sized wires
ranging from gauge #10 to gauge
#16.
19. 5. Electrician’s
Knife
• This is used by linemen to remove
insulation of wire and cables in low
and high voltage
• transmission lines.
20. 6. Portable Electric drill
• A small drilling machine with a chuck
capacity of ¼” to ½”. It is used in making
holes on metal sheets and concrete
walls.
21. CORDED DRILL
• The Corded drill is primarily used to make
holes into hard or tough materials. As the
name implies, it is powered by a long cord
that needs to be plugged to a power outlet.
It works with a rotating chuck that requires
some amount of power to drive holes into
tough materials
22. 7. Hacksaw
• This tool is used to cut metal
conduit and armored cable.
23. COMMON ELECTRICAL MATERIALS
ELECTRICAL MATERIALS ARE
DEVELOPED AND
CONSTRUCTED FOR A SPECIAL
PURPOSE, SUCH AS TO:
1. CONTROL THE FLOW OF
CURRENT IN AN ELECTRICAL
CIRCUIT;
2. CARRY ELECTRICAL CURRENT
FROM THE SOURCE TO THE
LOAD OR CURRENT
CONSUMING APPARATUS;
3. HOLD AND SECURE WIRES
TO ITS FIXTURES INSIDE AND
OUTSIDE HOUSES AND
BUILDINGS; AND
4. PROTECT HOUSES,
BUILDINGS, APPLIANCES, AND
INSTRUMENTS FROM
DESTRUCTION AND DAMAGE.
24. Convenience
outlet
Is a device that acts as a convenient source of
electrical energy for current consuming
appliances. It is where the male plug of an
appliance is inserted
and is usually fastened on the wall or
connected in an extension cord. It may be
single, duplex, triplex, or multiplex and could
be surface type or flush type.
25. Common Types of Convenience Outlet
a. Surface type
This type of outlet is typically buried in
concrete and is attach to the utility box
This type of outlet is typically mounted
on the surface portion of the wall.
b. Flush type
26. Male plug
• Is a device inserted to a convenience
outlet to allow the flow of electric
current. This is use in making
extension wires.
27. Lamp holders
• These are devices that hold the lamp
and are also called Lamp Sockets
or Ceiling Receptacles. These
come in many designs and sizes.
They are classified as flush, hanging
(weather proof/chain), and surface
types.
28. Switch
• Is a device that connects and disconnects the flow of
electric current in a circuit. There are many shapes,
designs, and types and they are classified as hanging,
flush, and surface types.
29. Fuse
• Is a circuit protective
device that automatically
blows and cuts the current
• when overload or short
circuit happens.
31. Junction Box
• Is an octagonal shaped electrical
material where connections, joints or
termination of wires are being done. It is
also where the flush type lamp holder is
• attached. This could be made of metal or
• plastic (PVC) Polyvinylchloride.
32. Utility Box
• Is a rectangular shaped metallic or
plastic (PVC) material in which flush
type convenience outlet and switch are
attached.
33. Flat Cord
• Is a duplex stranded wire
used for
• temporary wiring installation
and commonly used in
extension cord assembly. It
comes in a roll of 150 meters
and sizes of gauge # 18,
gauge # 16 AWG and gauge #
14 AWG (American wire
gauge).
34. Electrical Wire/Conductor
• Is the means in which electrical current will flow. It is usually
made of copper or aluminum with or without outside insulation.
35. a. Stranded wire
• Is made of multiple strands of copper or
aluminum joined together to make a single
wire.
b. Solid wire Is made of a single strand of copper or aluminum
wire. These are used in wiring installation inside and
outside the
buildings.
36. Common Types of Conduits/Pipes
• a. Rigid Steel Conduit (RSC)
• Is a thick-walled threaded tubing, usually made of
hot-dipped galvanized inside and outside and is
threaded at both ends.
b. Flexible Non-metallic conduit or corrugated plastic conduit
(CPC)
Is flexible corrugated plastic tubing that is moisture-
resistant and flame-retardant. It is easy to bend and
installs with snap-lock or glued plastic fittings.
c. Rigid Non-metallic conduit (PVC)
Is similar to plastic plumbing pipe and installs with
fittings. It can be bent after being heated using
portable heat gun.
37. d. Electrical Metallic Tubing (EMT)
• Are made of electro-galvanized metal. It
is typically thin and lightweight. EMT is
rigid but can be bent with a simple tool
called a conduit bender.
38. e. Flexible Metal Conduit (FMC)
• Has a spiral construction that makes it flexible so it can
snake through walls and other structures.
39. f. Liquid tight Flexible Metal Conduit (LFMC)
• Is a special type of flexible metal
conduit that has a plastic coating and is
used with sealed fittings to make it
water tight.
