Question 1 of 10
What is the primary function of a single-pole circuit breaker?
A single-pole breaker is designed to protect one phase conductor (hot wire) in a 120V branch circuit.
Question 2 of 10
Which wire size is recommended for a 15A branch circuit as per NEC standards?
According to NEC Table 310.16, 14 AWG copper wire is the standard size for a 15A branch circuit.
Question 3 of 10
What does a reading of ~120V between the Hot and Ground wires indicate?
In a properly wired system, measuring voltage between hot and ground, as well as hot and neutral, should yield approximately 120V.
Question 4 of 10
What is the standard wire gauge (AWG) used for a 20A branch circuit breaker?
For a 20A circuit, 12 AWG NM-B cable is required to handle the increased current capacity safely.
Question 5 of 10
When installing a single-pole breaker, where is the white (neutral) wire connected?
The neutral (white) conductor must be connected to the neutral bar, which is distinct from the breaker terminal.
Question 6 of 10
A single-pole breaker is meant to trip during which conditions?
Breakers are designed to trip when there is an overcurrent situation, such as an overload or a short circuit.
Question 7 of 10
Which NEMA receptacle is typically used for a 15A, 120V branch circuit?
The NEMA 5-15R is the standard outlet receptacle used for 15A, 120V circuits.
Question 8 of 10
What is the primary difference between a single-pole and a two-pole breaker?
Two-pole breakers are required for 240V circuits to simultaneously protect both phase conductors (L1 and L2).
Question 9 of 10
Before installing a new breaker, what is the first safety step to perform?
Safety first: Always turn off the main power and verify the absence of voltage before working inside an electrical panel.
Question 10 of 10
Where does the ground wire (EGC) connect in a main service panel?
The equipment grounding conductor (EGC) is connected to the designated ground bar, which is often bonded to the neutral in the main service panel.
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