Install electrical Protective Devices.
I. OBJECTIVES
A. Content Standard: Service entrance and circuit breaker/safety switch installation
B. Performance Standard: The learner independently installs electrical protection system for lighting
and grounding based on the Philippine Electrical Code (PEC) standards and Local Code/Utility Company
Regulations.
C. Most Essential Learning Competency
D. General Objective: The learner will be able to:
learn the uses of electrical protective devices, the advantages and disadvantages of the different
protection types and applied the principles in Installing Panel board
E. Specific Objectives
1. Install standard Electrical protection system for lighting and grounding
2.Perform the installation of: Electrical meter connection and grounding, Service entrance and
circuit breaker/safety switch of a residential structure
II. SUBJECT MATTER
A. Topic: Install electrical Protective Devices.
B. Reference/s:
https://www.elprocus.com/what-is-a-protection-device-different-types-of-protection-devices/
https://www.dehn.co.uk/en-gb/lightning-protection-systems
Competency-based Learning Material- developed by EIM Region 02
C. Learning Materials/Visual Aids: Pictures, Realia
III. PROCEDURE
Prayer
GreetingTeacher’s Activity Indicators
A. PRELIMINARY ACTIVITIES
Prayer
Greetings
Checking of Attendance
B. REVIEW
Activity
Direction: True or False.
Write True if the statement is correct. Write false if the statement is wrong.
1. Additional standard amperes ratings shall be 1, 3, 6, 10 and 601.
2. Fuse is an electrical safety device that operates to provide overcurrent protection of an electrical circuit.
3. Grounded conductor is a circuit conductor that carries current to the load.
4. Type “S” fuses shall be classified as 0 to 15, 16 to 20, and 21 to 30 amperes.
5. Open circuit is an electrical circuit that allows a current to travel along an unintended
path with no or very low electrical impedance.
C. MOTIVATION
Ask the students about the pictures/realia (shows in the monitor.)
D. PRESENTATION OF THE LESSON
Give me a common exampleof electrical protective device that you remember in your
junior high school lesson.
Answer: 1. Single Switch 3. circuit breaker
2. Two gang
4. Switch fuse
E. DISCUSSION/LESSON PROPER
Power Point Presentation
A device used to protect equipment, machinery, components and devices, in electrical
circuits, against short circuit, over current and earth fault, is called as protective
devices.
Protective devices are necessary to protect electrical appliance or equipment against:
a. Short Circuit
b. Abnormal variations in the supply voltage
c. Overloading of equipment
d. To protect the operator against accidental contact with the faulty equipment, falling which the
operator may get severe shock.
TYPES OF ELECTRICAL PROTECTIVE SYSTEM
1. Panelboard
A distribution board (or panelboard) is a component of an electricity supply system
which divides an electrical power feed into subsidiary circuits, while
providing a protective fuse or circuit breaker for each circuit, in a common
enclosure. Normally, a main switch, and in recent boards, one or more Residualcurrent devices (RCD) or Residual Current Breakers with Overcurrent protection (RCBO),
will also be incorporated.
2. Breakers
Are usually arranged in two columns. In a US- style board, breaker positions are
numbered left-to- right, along each row from top to bottom. This numbering system is
universal across various competing manufacturers of breaker panels.
F. APPLICATION
ACTIVITY
Identify the pictures shows on the screen and wire the its function/uses.
Electrical protective devices
G: ASSIGNMENT:
Write the procedures in installing electrical protective devices.
https://www.elprocus.com/what-is-a-protection-device-different-types-of-protection-devices/