I was planning on a dual earthx z-14 style power scheme with a forest of tabs for grounding at the firewall. For those with a similar approach did you run two 4 awg grounds to the forest of tabs or did you tie the grounds together at the batteries a run one 4awg ground wire to the forest of tabs? Batteries will be in the tail cone.
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Grounding a Z-14 dual battery configuration in an RV-10
- Thread starter 1949MGTC
- Start date
My 10 has two batteries in the back. I ran short wires to the frame and grounded them there. Forest of tabs is bolted to the firewall which is part of ther frame grd. I would never consider running ground wires fwd. Frame grounding for the main ground buss is a pretty standard practice on all kinds of vehicles and works very well if attention is paid to connection quality.
I went the other way and ran dedicated ground to the forest of tabs on the firewall.
Modified Z-14, no issues.
Modified Z-14, no issues.
Bob,
I’m confused. It sounds like you did what I was planning with z-14 and a dedicated forest of tabs on the firewall. Are your batteries in the Tailcone? Did you run two grounds from both batteries forward?
Go Boilers!
AAE 1987
I used the longeron. The F-1013-R runs from the baggage compartment to the firewall. I fabricated a 1x .125 angle that provided a secure mount for both ground lugs in the aft section of the fuse, this was riveted to the aft end of the longeron.. Then I used the hole in forward section of the longeron that was intended for the forward install of the rudder pedal mounts to attach a cable that connects to my forest of grounds and the firewall and the grounding braid to the engine.
This is like what LR172 posted above, but I wanted to ensure I had a robust mount for the ground cables that would provide a rigid fix. You can see the two holes for each of the two grounds coming off the dual earthX batteries I plan to use.
This is like what LR172 posted above, but I wanted to ensure I had a robust mount for the ground cables that would provide a rigid fix. You can see the two holes for each of the two grounds coming off the dual earthX batteries I plan to use.
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Two EarthX ETX00's in the tailcone. Battery grounds are common in the tailcone. One #2 AWG ground to a power bushing on the firewall. The cabin side of the power bushing goes to the forest of tabs, the engine side of the bushing goes to the engine case using 2 separate #4 awg cables from the power bushing.
Locally grounded in the tailcone here.
I have a forrest of tabs equivalent that is bolted to the firewall.
Engine has two ground straps to the firewall.
Nuckolls:
I have a forrest of tabs equivalent that is bolted to the firewall.
Engine has two ground straps to the firewall.
Nuckolls:
Makes perfect sense. Thanks for the clarity.
Same set-up in my 10. (Copied Bob's diagram) Z-14 calls for a #4 but since that is normally FWF mounted less of a voltage drop. Upsized to number 2 for the added length. Works well.
