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MFleming
Joined: 31 Oct 2017
Posts: 17
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 Posted: Fri Mar 19, 2021 8:29 am Post subject: Forest of Tabs in Multiple Locations |
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A fellow RV-7 builder has a B&C forest of tabs located on the pilot side of the firewall with battery ground attaching on the hot side.
They also have a small cluster of tabs on the sub panel. This group of tabs is electrically bonded to the sub panel and has a 14awg wire connecting the sub panel tabs to the firewall tabs. This cluster on the sub panel is for the avionics grounds.
Should the sub panel tabs be isolated from the sub panel or is it OK the way it is?
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Michael Fleming |
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nuckolls.bob(at)aeroelect
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| Posted: Sat Mar 20, 2021 5:35 am Post subject: Forest of Tabs in Multiple Locations |
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At 11:29 AM 3/19/2021, you wrote:
| Quote: | --> AeroElectric-List message posted by: "MFleming" <sagriver(at)icloud.com>
A fellow RV-7 builder has a B&C forest of tabs located on the pilot side of the firewall with battery ground attaching on the hot side.
They also have a small cluster of tabs on the sub panel. This group of tabs is electrically bonded to the sub panel and has a 14awg wire connecting the sub panel tabs to the firewall tabs. This cluster on the sub panel is for the avionics grounds.
Should the sub panel tabs be isolated from the sub panel or is it OK the way it is? |
The 14AWG jumper adds no value in a metal
airplane. I can be deleted and avionics grounded
at the sub-panel.
Bob . . .
Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"
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MFleming
Joined: 31 Oct 2017
Posts: 17
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| Posted: Tue Mar 30, 2021 11:29 am Post subject: Re: Forest of Tabs in Multiple Locations |
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So, would it better if the forest of tabs was not grounded at the sub panel and keep the connecting wire?
From reading your book I thought it is better for all grounds to be tied to a central ground location.
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Michael Fleming |
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rockitdoc
Joined: 30 Mar 2021
Posts: 6
Location: FORT COLLINS
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| Posted: Tue Mar 30, 2021 11:58 am Post subject: Re: Forest of Tabs in Multiple Locations |
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| nuckolls.bob(at)aeroelect wrote: | At 11:29 AM 3/19/2021, you wrote:
| Quote: | --> AeroElectric-List message posted by: "MFleming" <sagriver>
A fellow RV-7 builder has a B&C forest of tabs located on the pilot side of the firewall with battery ground attaching on the hot side.
They also have a small cluster of tabs on the sub panel. This group of tabs is electrically bonded to the sub panel and has a 14awg wire connecting the sub panel tabs to the firewall tabs. This cluster on the sub panel is for the avionics grounds.
Should the sub panel tabs be isolated from the sub panel or is it OK the way it is? |
The 14AWG jumper adds no value in a metal
airplane. I can be deleted and avionics grounded
at the sub-panel.
Bob . . .
Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?" |
So, given the choice: 1) ground tab forest grounded to airframe locally at ground tab mount, or 2) ground tab forest grounded by wire running to battery ground at firewall, which is more 'desirable'? Either?
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_________________
RV14A
Began 7-23-20
Fuse and tail Completed 2-20-21
Wings 99%
Finish 90%
Engine 99%
Wiring in Process |
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