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05-01-2013, 08:53 AM
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Join Date: Oct 2005
Location: San Antonio, TX
Posts: 281
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E-Bus relay location...
Do you all place the E-Bus relay on the engine or cockpit side of the firewall?
Do you have any pictures?
Thanks.
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05-01-2013, 10:30 AM
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Join Date: Oct 2007
Location: Sherrills Ford, NC (Lake norman area)
Posts: 432
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ebus relay
Ours was on the engine side of firewall. Brought in the 7.2ah backup battery. It was getting unreliable and I found a way to eliminate it. now just use a switch on the EXP bus panel to bring in the E bus battery and SD8 alternator.
__________________
Bill Fearheiley
Lake Norman, NC (14A)
RV7a N705RP (no longer own)
Contribution in for 2017, money well spent
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05-01-2013, 10:35 AM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,408
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Switch only here also.
Switch is rated at 30A as I recall, I used a DPST switch and paired the double poles, so theoretically doubled the rating.
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010 
Phase 1 done, 2/4/2011
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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05-01-2013, 10:42 AM
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Join Date: Oct 2007
Location: Sherrills Ford, NC (Lake norman area)
Posts: 432
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relay
Quote:
Originally Posted by Mike S
Switch only here also.
Switch is rated at 30A as I recall, I used a DPST switch and paired the double poles, so theoretically doubled the rating.
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When I took out the Ebus relay I was shocked, it bet that thing weighs 2 lbs!
__________________
Bill Fearheiley
Lake Norman, NC (14A)
RV7a N705RP (no longer own)
Contribution in for 2017, money well spent
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05-01-2013, 11:00 AM
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Join Date: Jan 2010
Location: Ottawa, Ks
Posts: 2,188
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I just mounted mine on the fuse tray. The s7401? Relay I used was just ounces.
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05-01-2013, 12:08 PM
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Join Date: Oct 2005
Location: San Antonio, TX
Posts: 281
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Thanks Guys. I like the idea of a switch instead of a relay but I think the whole point of using the relay was to get the power line that you could not shut off out of the cockpit right?
- Matt
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05-01-2013, 12:59 PM
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Join Date: Apr 2009
Location: USA
Posts: 1,499
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Quote:
Originally Posted by idleup
Thanks Guys. I like the idea of a switch instead of a relay but I think the whole point of using the relay was to get the power line that you could not shut off out of the cockpit right?
- Matt
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That is my reasoning on unprotected circuits. Would I rather have a relay fail(that can be bypassed to get me home) or burning plastic, sparks, smoke and molten copper produced during a crash?
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Good judgment comes from experience, and a lot of that comes from bad judgment.
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05-01-2013, 01:02 PM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,408
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Quote:
Originally Posted by idleup
Thanks Guys. I like the idea of a switch instead of a relay but I think the whole point of using the relay was to get the power line that you could not shut off out of the cockpit right?
- Matt
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Quote:
Originally Posted by Wayne Gillispie
That is my reasoning on unprotected circuits. Would I rather have a relay fail(that can be bypassed to get me home) or burning plastic, sparks, smoke and molten copper produced during a crash?
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Agree with the above, I put an inline fuse (30A as I recall) back at the battery.
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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05-01-2013, 05:49 PM
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Join Date: Nov 2005
Location: Asheville, NC
Posts: 2,690
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Quote:
Originally Posted by idleup
Thanks Guys. I like the idea of a switch instead of a relay but I think the whole point of using the relay was to get the power line that you could not shut off out of the cockpit right?
- Matt
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I used a switch. The line coming from the battery bus to the E-bus switch is fused on the battery bus so that is not a cabin worry. The line from battery, through the firewall, to the battery bus fuse block was a worry until I put a fusible link on it at the battery post. Fuse link recommended by an AI that I asked to give me a once over prior to first flight. I agreed.
__________________
Bill Pendergrass
ME/AE '82
RV-7A: Flying since April 15, 2012. 850 hrs
YIO-360-M1B, mags, CS, GRT EX and WS H1s & A/P, Navworx
Unpainted, polished....kinda'... Eyeballin' vinyl really hard.
Yeah. The boss got a Silhouette Cameo 4 Xmas 2019.
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