Bob.Bower(at)hdrinc.com
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 Posted: Mon Jul 21, 2014 1:58 pm Post subject: Z13 fusible link, circuit breaker, same circuit? |
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My mistake, you are of course, correct.
From: owner-aeroelectric-list-server(at)matronics.com [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of John Tipton
Sent: Monday, July 21, 2014 2:48 PM
To: aeroelectric-list(at)matronics.com
Subject: Re: AeroElectric-List: Z13 fusible link, circuit breaker, same circuit?
Just to clarify:
Question 3 : four sizes smaller than 20awg, is 24awg, not 16
John
Sent from my iPad
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On 21 Jul 2014, at 09:55 pm, "Bower, Bob" <Bob.Bower(at)hdrinc.com (Bob.Bower(at)hdrinc.com)> wrote:
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Something puzzles me . . .
Drawing Z-13/8 rev T dated 1/17/2014 shows both a 22AWG fusible link and a 5A circuit breaker between the main bus and terminal 5 of the Bat/Alt DC Power switch. When the Bat/Alt DC Power switch is closed and the alternator is making power, the 5A circuit breaker will open if the crowbar over voltage protection module connected to terminal 4 of the Bat/Alt DC Power switch, senses an over voltage condition and grounds the circuit. This functionality I understand.
The wire between the fusible link and the circuit breaker is called out as 18AWG, thus the four size smaller 22AWG fusible link makes sense to me. Three questions:
<![if !supportLists]>1. <![endif]>What is the function of the 22AWG fusible link in this circuit?
<![if !supportLists]>2. <![endif]>Shouldn’t the wire from the 5A circuit breaker to the Bat/Alt DC Power switch and the wire from the Bat/Alt DC Power switch terminal 4 to the voltage regulator terminal A also be 18AWG?
<![if !supportLists]>3. <![endif]>Alternatively, assuming the 20AWG wire is sufficient to carry the load, shouldn’t all wires in this circuit be 20AWG and the fusible link be 16AWG, i.e. 4 sizes smaller?
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