Level 2 Module 10 Basic Electrical Construction Drawings
Exam 2023 with complete solution
Circuit breaker classification ranges
15A - 100A
125A - 225A
250A - 400A
500A - 1,000A
1,200A - 2,000A
A sustained overload is
3 hours or more
2 types of current ratings on circuit breakers
Continuous current rating - (most common)
Fault current interrupting capacity
Circuit breakers are classified in frame sizes based to the
Largest ampere rating of its range
100A
225A
400A
1,000A
2,000A
On an overload, the circuit breaker
opens itself, or trips
Circuit breaker voltage ratings indicate
the maximum electrical system voltage on which they can be applied.
Circuit breakers can be rated for
either alternating current (AC) or direct current (DC) or both
The amperage interrupting capacity (AIC) of a circuit breaker is the
maximum short circuit current at which the breaker will safely interrupt the circuit
Selecting overcurrent protective devices with proper interrupting capacity is
Exam 2023 with complete solution
Circuit breaker classification ranges
15A - 100A
125A - 225A
250A - 400A
500A - 1,000A
1,200A - 2,000A
A sustained overload is
3 hours or more
2 types of current ratings on circuit breakers
Continuous current rating - (most common)
Fault current interrupting capacity
Circuit breakers are classified in frame sizes based to the
Largest ampere rating of its range
100A
225A
400A
1,000A
2,000A
On an overload, the circuit breaker
opens itself, or trips
Circuit breaker voltage ratings indicate
the maximum electrical system voltage on which they can be applied.
Circuit breakers can be rated for
either alternating current (AC) or direct current (DC) or both
The amperage interrupting capacity (AIC) of a circuit breaker is the
maximum short circuit current at which the breaker will safely interrupt the circuit
Selecting overcurrent protective devices with proper interrupting capacity is
