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Heavy E-Bus & Fuseable Link

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hammer408(at)comcast.net
Guest

Posted: Fri Jun 06, 2008 10:53 am Post subject: Heavy E-Bus & Fuseable Link

Bob:



Im installing a Heavy E-Bus architecture, per Z-32.

Currently my E-Bus load is around 13amps...architecture is:

18g F-link at E-Bus---14 awg---S704-1 relay---14 awg---10amp fuse at Battery

Bus.



According to B & C, fuseable links are for low power, 10 amps or less.....so

should I eliminate the fuseable link and directly wire my 14 g wire to #10

stud on E-Bus

OR wire to a 10 or 15 amp fuse on the E-bus - and increase the Battery Bus

Fuse from 10 amp to 15 amp?



What I'm carring on my E-Bus is basically my Avionic's Panel: 340 audio, 430

nav/com gps,330 Transponder and 106 Indicator - Amp draw is approx:7 amps,

but in TRANSMIT Mode, I'm pulling an extra 6 AMPs for a total of about 13

amps.



Any suggestions appreciated, or should I wire per Z-32, since the extra 6

Amp in transmit mode is interminent and will only spike to 13 or so amps

periodically.



Thanks



Henry

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nuckolls.bob(at)cox.net
Guest

Posted: Sat Jun 07, 2008 5:51 am Post subject: Heavy E-Bus & Fuseable Link

At 02:55 PM 6/6/2008 -0700, you wrote:

 	  Quote: 	
		  

<hammer408(at)comcast.net>



Bob:



Im installing a Heavy E-Bus architecture, per Z-32.

Currently my E-Bus load is around 13amps...architecture is:

18g F-link at E-Bus---14 awg---S704-1 relay---14 awg---10amp fuse at Battery

Bus.



According to B & C, fuseable links are for low power, 10 amps or less.....so

should I eliminate the fuseable link and directly wire my 14 g wire to #10

stud on E-Bus

OR wire to a 10 or 15 amp fuse on the E-bus - and increase the Battery Bus

Fuse from 10 amp to 15 amp?



What I'm carring on my E-Bus is basically my Avionic's Panel: 340 audio, 430

nav/com gps,330 Transponder and 106 Indicator - Amp draw is approx:7 amps,

but in TRANSMIT Mode, I'm pulling an extra 6 AMPs for a total of about 13

amps.



Any suggestions appreciated, or should I wire per Z-32, since the extra 6

Amp in transmit mode is interminent and will only spike to 13 or so amps

periodically.


	


   FUSIBLE LINKS are recommended ONLY for those places

   where shown in the Z-figures and there are no fusible

   links in Z-32. Use a 15A fuse for your Z-32 e-bus

   alternate feed path. I don't know where B&C got that

   10A number. The fuse blocks are factory rated for up to

   30A in any given fuse slot . . . My personal design

   criteria de-rates them to 15A which is large enough

   for 99% of situations. For larger loads I would consider

   a FUSIBLE LINK or other form of robust current limiter.



   Bob . . .

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