What are the differences between a CAFCI and an AFCI and how do they function in protecting against electrical fires?

A CAFCI (Combination Arc-Fault Circuit Interrupter) is an advanced version of an AFCI (Arc-Fault Circuit Interrupter). Both devices are designed to detect and prevent electrical fires caused by arcing faults in wiring.

The main difference between the two is that a CAFCI can detect both series and parallel arcing faults, while an AFCI can only detect parallel arcing faults. Series arcing faults occur when there is a break in the conductor, while parallel arcing faults occur when there is a poor connection in the wiring.

In terms of functionality, both CAFCIs and AFCIs work by continuously monitoring the electrical current flowing through a circuit. If they detect abnormal arcing patterns that could potentially lead to a fire, they will quickly interrupt the circuit to prevent any further danger.

Overall, CAFCIs provide a higher level of protection by detecting a wider range of arcing faults, making them more effective in preventing electrical fires.