Electrical Exam Term
Overcurrent
Any current in excess of the rated current of equipment or the ampacity of a conductor, which may result from an overload, short circuit, or ground fault.
Detailed Explanation
Overcurrent protection is provided by circuit breakers and fuses, which are sized according to NEC Article 240. The overcurrent device must interrupt the circuit before conductors overheat and cause a fire. NEC 240.4 specifies that conductors must be protected at their ampacity, with specific exceptions such as tap rules (240.21) for feeder taps and transformer secondary conductors.
Premium Study Material
Don't just memorize terms.
Master the exam.
Get access to 650+ exam-like questions, detailed explanations, and specific state law-supplements for your state.
Pass Guarantee
State-Specific Content
Unlimited Practice Tests
Instant Feedback
Practice QuestionEasy
Which of the following best describes the concept of Overcurrent?
Start Practicing →