Questions and Answers
What is a ground fault?
What happens when a ground fault occurs?
The frame becomes electrified and poses a danger to people.
When can a load have a ground fault?
What does a chassis ground do?
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Ground wires are attached to the chassis of an appliance to protect against electrical shock.
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Where does the other end of a ground wire attach?
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When a ground fault occurs, the circuit breaker will open, cutting power due to very high current flow through the hot line, chassis, and ___ wire.
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Study Notes
Ground Faults
- A ground fault occurs when a hot wire (L1, L2, or L3) makes contact with the frame of a load or appliance.
- The electrification of the frame poses a serious risk to individuals, making it hazardous.
Loads and Ground Faults
- A load develops a ground fault when components within it become loose and touch the load's frame.
- This contact causes the frame of the load to become energized, risking electrical shock.
Chassis Ground
- A wire known as the chassis ground connects the load's frame to the appliance’s chassis.
- In the event of a ground fault, the appliance's chassis may also become electrified.
Purpose of Ground Wires
- Ground wires are connected to the appliance's chassis to guard against electrical shock stemming from ground faults.
- They serve as a safety mechanism to protect users from potential hazards.
Ground Wire Connection
- The other end of the ground wire is attached to the Earth (ground), which is capable of conducting electricity.
- This connection provides a safe pathway for electric current away from the appliance.
Circuit Protection
- When a ground fault occurs and the appliance is properly grounded, high current flows through the hot line, the chassis, and then the ground wire.
- This surge in current activates the fuse or circuit breaker, leading to the disconnection of power in the circuit with the ground fault, enhancing safety.
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Description
Test your knowledge on electrical safety with these flashcards focused on ground faults and ground wires. Each card presents key terms and definitions, helping you understand the dangers associated with ground faults in electrical systems.
