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yellowduckduo(at)gmail.co
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 Posted: Thu Jan 07, 2021 4:12 pm Post subject: Where to put the Cross-Feed Contactor? |
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Mine sits beside the batteries and batteryr contactor. Maintenance is
largely a non issue. It is in a relatively benign area. It conducts
significant current during cranking but doesn't actually switch high
current like a starter contactor.
Ken
On 07/01/2021 3:39 PM, Dan wrote:
| Quote: | I have A-14 with rear batteries. Finishing the wiring right now. My
thought was that the cross-feed contactor would go on the inside of
the firewall so that only one fat wire has to go through (I have the
brass ground block that bolts through the firewall, and of course,
there are a bunch of smaller wires that go through, probes and such
and wires from the alternator controllers, which are on the engine
side). The person helping me thinks it would be better to locate the
cross feed contactor on the engine side because maintenance is
easier. But if it is on the engine side, more fat wires go through
the firewall.
Does anyone have an opinion on this? I understand it is a pain to
crawl under the panel and get at the firewall. On the other hand, it
seems to me there is a benefit to minimizing the number of fat wires
through the firewall.
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nuckolls.bob(at)aeroelect
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| Posted: Thu Jan 07, 2021 8:50 pm Post subject: Where to put the Cross-Feed Contactor? |
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| Quote: | The person helping me thinks it would be better to locate the cross
feed contactor on the engine side because maintenance is easier. |
The cross-feed contactor becomes the forward power
distribution point for energy from the two systems.
Having it on the cabin side probably simplifies
wiring to the busses and reduces volume of wire
through the firewall.
This contactor has a VERY low operating stress profile.
Maintenance should be the lowest of all the contactors.
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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