What is the purpose of overcurrent protection devices?
Overcurrent protection devices such as circuit breakers and fuses protect conductors and equipment from excessive current flow.
Which NEC article governs overcurrent protection?
Article 240 of the NEC outlines requirements for overcurrent protection of conductors and equipment.
Which device is commonly used for branch circuit overcurrent protection?
Circuit breakers are commonly used to protect branch circuits by automatically interrupting current during faults.
What does grounding provide in an electrical system?
Grounding provides a safe path for fault current and helps stabilize voltage levels in electrical systems.
Which article in the NEC covers grounding and bonding?
NEC Article 250 contains rules for grounding electrodes, bonding conductors, and grounding connections.
What is a grounding electrode?
A grounding electrode is a conducting object, such as a ground rod, that connects the electrical system to earth.
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Which conductor connects the grounding electrode to the system?
The grounding electrode conductor establishes a connection between the system and the grounding electrode.
How does bonding differ from grounding?
Bonding ensures electrical continuity between metal parts while grounding connects systems to earth for fault current dissipation.
Which condition could result from a missing or broken ground connection?
Without proper grounding, fault currents may energize metal parts, creating shock or fire hazards.