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nuckolls.bob(at)aeroelect
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 Posted: Mon Jun 12, 2017 4:11 pm Post subject: Question about Z19RB and OVP/Beaker and size wire |
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At 12:35 PM 6/12/2017, you wrote:
| Quote: | --> AeroElectric-List message posted by: "Achille" <mickael.t(at)live.fr>
Hello all,
I'am new on the forum, and I need some help to restart my plane please. 
I started to change my electrical system on my plane. I had single battery, single old car ignition "Delco" type.
I set now dual battery and two Leburg ignitions and an over-voltage protection (due to electrical dependance) and I have some question to finish it.
My plane is an IBIS junqua RJ03 (wooden canard layout), looking to wire it with the Z19/RB.
My main battery is 20ah (into the nose, so I will wire it with 2AWG to starter) and the aux. small battery 7ah., 30 inch. behind the main bat. but also in the forward part of the plane.
Bus are quite close to the aux. battery. (30 inch. above) so I take the Z19AB wiring diagram.
My problems are :
I am not sure about the wires size and fuse/breaker to use, as Bob said it's a diagram and suggestion. And reading and reading again the chapter about wires size I keep not very confident to do my choice alone.
1) My cuve facet pumps (main and auxiliary, same model, have a consumption around 1,6amp/one apparently) are 20ft behind buses and switches. |
20AWG wire is 10 milliohms per foot . . . 1.6A x 20
yields a voltage drop of 320 millivolts . . . FOR THE
SUPPLY run. I presume the pump(s) are grounded to the
same fat-wire that runs from main battery(-) to the
crankcase.
| Quote: |
Same things for my ignitions. (It seems to be 0,4amp/each) may I use 14AWG for fuel pump and 16 awg for ignition ? (4 degrees Celsius only increase of temperature I calculate, I can take smaller wire not ? But up to what size to be safe, for my tezfel wire, ) |
20AWG here too would be quite sufficient.
| Quote: | | 2)I have the OVP kit Bandc.aero and I have to set it close to the alternator o i can set it close to the switching panel ? (without changing the 5 amp breaker du to length of the wire ?) |
Install up front close to breaker.
| Quote: | 3)I don't know how to wire my bandc-aero OVP kit. they sent me this diagram and did not succeeded to have another precision:
http://www.aeroelectric.com/PPS/Adobe_Architecture_Pdfs/Z17K.pdf
Problem is that I don't have a dynamo. I have a car alternator of 30A.
Z19Rb don't show the relay and warning light that I have. |
Wire as shown in Z-19 . . . you don't need the relay.
BE SURE THAT opening the control wire to your alternator
actually opens the alternator's field supply. Unless
this is true, your alternator may not be compatible
with any form of external overvoltage management.
Bob . . .
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Achille
Joined: 12 Jun 2017
Posts: 25
Location: Europe
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| Posted: Wed Jun 14, 2017 7:17 am Post subject: Re: Question about Z19RB and OVP/Beaker and size wire |
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Thank you Bob for your response.
How could I check if my alternator is compatible with en external OVP before wiring it ? (it is not wired anymore)
It was wired like the picture attached in this message. (drawn by constructeur)
Thank you.
Mickaël
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