Question

afcis operate by monitoring the connected circuit for signs that electrical current is arcing between conductors in either a parallel or a series arcing fault or, as in the case with combination type, both series and parallel. in a series arc, how much of the circuit current is involved in the arc fault?
none of the normal circuit current
roughly 300–400% of the circuit current
100% of the normal circuit current
roughly 80% of the circuit current

Explanation:

In a series arc fault, the arc is in series with the circuit, so the entire (100%) normal circuit current is involved in the arc fault. The other options are incorrect: "None" is wrong as current flows through the arc; "300 - 400%" is typical of parallel arc faults (where a low - resistance path causes a large increase in current); "80%" is not accurate for series arc fault current involvement.

Answer:

C. 100% of the normal circuit current