INSTALL CIRCUIT GROUNDS
Critical Task: 051-246-1104
In this lesson, you will learn to describe the procedures used to install circuit grounds.
TERMINAL LEARNING OBJECTIVE:
You will learn to describe the procedures used to install circuit grounds.
You will be given the material contained in this lesson. You will work at your own
pace and in your own selected environment with no supervision.
You will correctly answer the practice exercise questions at the end of this lesson.
REFERENCES: The material contained in this lesson was derived from STP 5-51R12-SM-TG and
Section 250 of the NEC.
As an electrician, you must know how to install circuit grounds from the panel box to all circuits. In this
lesson, you will see how this is accomplished to ensure that injury or fire does not occur because of a
faulty ground connection. You must be able to wire all circuits and have the proper size of conductors
and connections for all circuits in the system.
2-1. Types of Conductors. Three different types of conductors are used to install grounding systems.
They are copper, aluminum, and copper-coated aluminum (Figure 2-1, page 2-2).