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Site Updated Oct. 2, 2008
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Glossary of Arc–Fault Technical Terms


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AFCB: Arc–fault circuit breaker.

AFCI: Arc–fault circuit interrupter.

Common Source Impedance Feedback: Occurs when an arc–fault in one circuit affects the source voltage enough to impose an arc signal onto any circuits that run in parallel to the arcing circuit. Feedback is likely to occur on lines with lower power rated supplies, and if not considered can also cause an unnecessary power interruption on the non arcing circuit.

EMI: Electromagnetic interference.

Ground Arc–Fault: An arc–fault between circuit and ground reference.

Inductively Coupled Cross–Talk: Occurs when an arc–fault in one circuit causes an arc signal to be injected onto a closely coupled circuit. Cross talk is likely to occur on lines that are physically collocated (run in the same bundle for example), and if not considered can cause an unnecessary power interruption on the non–arcing circuit.

Parallel Arc–Fault: An arc–fault between two parallel portions of a circuit (including arcing to adjacent active lines), where the arcing current bypasses the circuit load (generally higher current).

RFI: Radio frequency interference.

RPC: Remote power controller.

SSPC: Solid–state power controller.

Series Arc–Fault: An arc–fault between two series portions of a circuit, where the arcing current is limited by the circuit load (generally low current).
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