Lesson Plan Industry Sector
Agriculture & Natural Resources

## Electrical Wire ID and Prep

### Lesson Plan Overview / Details

Students will understand how to select the proper wire for the job and how to prepare the wire for connection to a terminal.

### Lesson Time

Electrical wire ID and Prep
2 Hours

### Objectives and Goals

• Students will identify and select the proper wire for a given circuit
• Students will prepare wire for a basic electrical circuit

### Activities in this Lesson

• Install a damaged switch or trip the circuit breaker that controls the lights in the classroom. As the students enter the room do not allow them to touch the light switch. When the class starts ask one of the students to turn on the lights. Now ask the class, "What might be the problem with this circuit." Wait for responses. Listen for students to say "It is a faulty switch of wire". Now ask, "if this is due to a faulty switch, or bad wire, how many of you would know how to change it?" Today we are going to learn about how to identify and prepare wire to install circuits.

• Handout the "electrical wire ID" worksheet (see below) to each student and have them use it to take notes on the presentation using the Electrical Wire ID power point. It would be helpful to have various types and sizes of wire on hand as demonstrations.

• Electrical Wire Preparation - Demo / Modeling

You will need the following materials for the this demonstration: One small piece (6-8 inches) of insulated copper or aluminum electrical wire (12-14 gauge), one pair of wire strippers, one pair of diagonal cutters, one screw driver (standard or Phillips) and a switch or duplex receptacle. Demonstrate to small groups of students (4-5 per group) how to properly strip the end of the electrical wire (approximately 3/4 of an inch) and bend in to a loop (bend the wire just above the insulation at a 90 degree angle then clamp the end of the wire a pair of strippers or diagonal cutter and twist the wire into a clock wise loop) (see the attached videos below titled, "How to make a loop #1 and How to make a loop #2). Attach the wire to one of the terminals on the switch or receptacle (be sure that the wire is clockwise around the terminal). Tighten the terminal screw. (see video below titled "How to attach the loop to a screw terminal"). You may want to simply show each of the videos to the whole class instead of doing the demo several times. This depends on your access to technology and/or your class sizes.

• Give each student a copy of the Rubric (below) prior to giving directions for the assessment assignment. The student demonstration is outlined below.

### Assessment

Assessment Types:
Demonstrations,

Each student, or group of two students will need the following materials:

1.  One small piece (6-8 inches) of insulated copper or aluminum electrical wire (12-14 gauge)

2.  One pair of wire strippers, one pair of diagonal cutters

3.  One screw driver (standard or Phillips)

4.  One switch or duplex receptacle.

Demonstration Steps:

1. Strip the end of your wire using the correct size wire stripper notch.  Strip approximately 3/4 of an inch.

2.  Using the strippers or diagonal pliers, bend  the end of the wire into a loop.  Bend the wire just above the insulation at a 90 degree angle then clamp the end of the wire a pair of strippers or diagonal cutter and twist the wire into a clock wise loop.

3.  Attach the wire to one of the terminals on the switch or receptacle (be sure that the wire is clockwise around the terminal). Tighten the terminal screw.