HOW TO CONTROLL A LIGHT FROM 3 LOCATIONS.

UNIT:-    WIRING METHODS.

AIM:-      How to control a Light bulb from 3 locations?

PERFORMANCE OBJECTIVES:-   S.W.B.A.T  (Student will be able to)

1. Define a 4 way switch.
2. Know the applications for a 4 way switch. 
3. Connect a light to be controlled from 3 locations using EMT raceway.

PRESENTATION:-   

1. Motication
2. Definitions

4 WAY SWITCH:-  It may be simply be defined as a controlling device, which main function is to provide control for a load from 3 or more locations. It consists of two (2) sets of travelers, input and output, which are to be connected in between the 3 way switches. The 4 way switch may be used for alternating power for 2 two or more loads.

SAFETY:-  Always test for power even if the fuse or circuit breaker appears to be "OFF"

HOW TO CONTROLL A LAMP FROM 3 LOCATIONS?

UNIT:-    WIRING METHODS.

AIM:-      How to control a lamp from 3 locations?

DO NOW:  Draw the actual & Schematic diagram for the following lay out.

HOW IS WATTS' LAW APPLIED TO AN ELECTRICAL CIRCUIT?

LESSON NO. 9

UNIT:-  Watts' Law 

AIM:-      How is watts' law applied to an electrical circuit?

PERFORMANCE OBJECTIVES:-   S.W.B.A.T  (Student will be able to)

1. Define watts' law.
2. Know the formula used for watts' law. 
3. Apply the watts' formula to an electrical circuit. 

SAFETY :-   Finding the total wattage consumption in an electrical circuit can assist us in determining the proper wire size and avoiding the overheating of the conductor, which could possibly lead to an electrical fire.

DEFINITIONS:-  Watts' Law :-  A formula used by electricians to dind the missing values for power, voltage and amperes in a particular circuit.

W= E x I           E= W / I           I= W / E

HOW TO MAKE 90* DEGREE BEND(ELBOW) ON 1/2" EMT?

LESSON NO. 9

UNIT:-    EMT How to make a 90* degree bend?

AIM:-      How to make a 90* degree bend (Elbow) on 1/2" EMT?

PERFORMANCE OBJECTIVES:-   S.W.B.A.T  (Student will be able to)

1. Define a 90* degree bend (Elbow).
2. Know the required steps to make a 90* degree bend. 
3. Make a 90* degree bend (Elbow). 

DEFINITIONS:-  90* Degree Bend (Elbow):-  A bend performed on a piece of tubing (Conduit) to change the direction from vertical to horizontal for the raceway.

STEPS:-

1. Measure the distance between the starting point and the desired location to start the bend.
2. Transfer this measurement to your tubing.
3. Deduct 5" for 1/2" EMT.
4. Place your tubing into your bender (shoe) with the deducted point (5") at the arrow on bender.
5. Make sure to have the handle on bender leaning towards the starting point. 
6. Step on the bender shoe and pull the handle towards you until the tip of the tubing is set to a vertical position off the floor. 

HOW TO CONTROL A CEILING LAMP FROM 2 LOCATIONS?

LESSON NO. 8

UNIT:-    WIRING METHODS.

AIM:-      How to control a ceiling lamp from 2 locations?

PERFORMANCE OBJECTIVES:-   S.W.B.A.T  (Student will be able to)

1. Define a 3 way switch.
2. Identify the terminals on a 3way switch. 
3. Connect a lamp to be controlled from 2 locations using EMT raceway.

DEFINITIONS:-  3 WAY SWITCH :-    This is a controlling device, Which it is used for controlling loads from 2 two or more locations. It may be used for alternating the flow of power for two (2) loads as well.

 Layout Plane:

HOW TO MAKE A 3 POINT SADDLE?

LESSON NO. 7

TOPIC:-    EMT.

AIM:-      How to make a 3 Point Saddle?

PERFORMANCE OBJECTIVES:-   S.W.B.A.T  (Student will be able to)

1. Define a 3 Point Saddle.
2. Know the application for a 3 Point saddle. 
3. Know the required to make a 3 Point saddle. 
4. Make a 3 Point saddle.

DEFINITIONS:-  3 Point Saddle:-    It is a bend that we go over an existing round obstruction in most cases another electrical raceway. This bend consists of 3 bends, One at the center and two other bends at equal distance from the center bend, But in the opposite direction.

 STEPS :-

1. Measure the distance of the starting point to the center of the obstruction. 
2. Transfer this measurement on to your tubing (place a mark) this becomes your center point.
3. For 1/2" EMT place on mark on your tubing 3 1/2" towards the left from your center mark (this becomes point X ).
4. Repeat step 3 but towards the right from center (This becomes point Y).
5. Make a 45* degree bend a center point of tubing by placing it at point "A" on bender. 
6. Reversing the tubing make a 22.5* degree bend at point "X" on tubing and place it at point arrow on bender.

WHAT ARE THE CHARACTERISTICS OF "THE ACTUAL WIRING" DIAGRAM?

LESSON NO. 6

TOPIC:-    Wiring Methods.

AIM:-      What are the characteristics of the actual wiring diagram?

PERFORMANCE OBJECTIVES:-   S.W.B.A.T  (Student will be able to)

1. Define the actual wiring diagram.
2. Identify the actual wiring diagram. 
3. Draw the actual wiring diagram for a given layout.

DEFINITIONS:-  Actual wiring diagram:-    It is an electrical drawing of devices shown in their actual setting and all connections are.

WHAT ARE THE CHARACTERISTICS OF THE SCHEMATIC DIAGRAM.

LESSON NO. 5

TOPIC:-    Wiring Methods.

AIM:-    What are the characteristics of the schematic diagram.

PERFORMANCE OBJECTIVES:-    S.W.B.A.T. (Student will be able to)

1. Define a schematic diagram.
2. Identify a schematic diagram. 
3. Draw a schematic diagram.

DEFINITIONS:-    Schematic Diagram:-   An  electrical drawing of electrical devices connected between 2 two or more power lines and in a "LINE" form.


LAYOUT PLAN:-  An electrical drawing which  consists of electrical devices in their actual settings, but no connection is made wire raceways and # of conductors are indicated.

SYMBOLS:-    S= Single pole switch it has an "ON/OFF" position wiring 0/0

HOW TO CONNECT CEILING LAMP TO BE "LIVE" AT ALL THE TIME?

LESSON NO. 4

TOPIC:-   Wiring Methods.

AIM:-    How to connect ceiling lamp to be "LIVE" at all the time?


PERFORMANCE OBJECTIVES:-   S.W.B.A.T  (Student will be able to)

1. Define power source.
2. Identify the main conductors in an electrical circuit.
3. Connect a lamp to be "LIVE" at all the times.

DEFINITIONS:-   POWER SOURCE:-   It is the main component in the circuit. This is where every circuit start.

CONDUCTORS IDENTIFICATION:-   HOT WIRE:  Also knows as the feed wire, it is responsible for supplying the positive part of the power to an electrical circuit. It is drawn as a solid line.

THE NEUTRAL WIRE:-    This is the conductor which returns power supplied by the "HOT" wire in a circuit to any given loads. The neutral wire either white or gray.

THE GROUND WIRE:-    This is the wire which is responsible for protecting life and property this color is "GREEN".

DIAGRAMS:-            

                                                         

HOW TO MAKE A BOX OFFSET BEND?

LESSON NO. 3

TOPIC:    EMT (Electrical Metallic Tools)

AIM:     How to make a Box offset bend?

PERFORMANCE OBJECTIVES:     S.W.B.A.T. (Student will be able to)

1. Define a box offset bend.
2. Know the required steps to make a box offset bend.
3. Make a box offset for 1/2" inch EMT.

DEFINITION:   BOX OFFSET BEND :-   It is a bend made on a piece of tubing at a box entry point. This bend is made to allow proper support to the tubing through it entire run. By keeping the tubing flush with the surface and rising up only at the desired K.O. entry point.

TOOLS:     A 1/2 inch EMT bender is to be used or a special offset bender.

STEPS: 

1. Insert the tip of the tubing in the EMT bender. 
2. Make a (15*) slight bend to the tubing.
3. Make your bend to face down and re-inserted into the bender.
4. By pass the 1st bend with the arrow on the bender and make your 2nd bend (15*). 
5. Test your completed offset bend on a flush surface.

 

REVIEW SAFETY GUIDANCE FOR ELECTRIC WORK

TOPIC: Wiring Methods

AIM: How to install an electrical device in an existing construction?

PERFORMANCE OBJECTIVES: S.W.B.A.T.

1. Define a device Box.
2. Know where is installed.
3. Know the necessary steps to install it.

DEFINITION:
Device box gang box that is used for the installation of switches, lamps, single and duplex receptacle. It is used in finished construction, where all walls, floors and ceilings are closed in.

STEPS:

1. Measure the distance at the desired location.
2. Make out the box on the wall or ceiling using a pencil.
   
3. Use a key-hole saw to cut out the wall.
4. Insert the cable into the box K.O. clip.
   
5. Insert the box into the hole.
6. Fasten the box using Erickson or Madison clips on each side.