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fusible link downstream of circuit breaker

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johnbright

Joined: 14 Dec 2011
Posts: 167
Location: Newport News, VA

Posted: Thu Oct 10, 2019 9:40 am Post subject: fusible link downstream of circuit breaker

One of the electronic fuel injection systems marketed to EAB delivers a harness with fusible links inside a firewall passthru connector. I sketched what they recommend and attached it here.



I see:

* The unprotected wire between the essential bus and the circuit breaker.

* The possibility of the wire between the breaker and the firewall connector opening or shorting to ground taking out all four injectors.

But I'm wondering if the fusible links do anything at all. I don't know the awg of the links but suppose they were 24 awg which has a fusing current of 29 A. If an injector wire shorted to ground between the firewall connector and an individual injector would the circuit breaker trip taking out all four injectors?

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_________________
John Bright, RV-6A
Single battery, wound-field alternator on main bus, MZ-30 PM generator on engine/essential bus.
N1921R links

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