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Thread: P-Leads

  1. #1
    NHPacerPilot's Avatar
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    Default P-Leads

    What's the correct gauge of shielded wire to buy for the P-Leads for the magnetos. just noticed mine are really old and piece milled together. Anyone know? I keep pricking my fingers on the strands from the old outside shielding! Thanks in advance.

  2. #2

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    Try Sacremento Air Ranch. http://www.sacskyranch.com/acatalog/...l_Wire_37.html
    The P-lead wire they sell has a heavier guage shield. I tried some other shielded aircraft wire for P-leads that had very fine wire shield and it was difficult to work with.

    Hope that helps

  3. #3
    Administrator Steve Pierce's Avatar
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    I made new P-leads for Cathy's Tri-Pacer and used the wire listed above. Nice and flexible, worked very well and looks good too with a durable cover over the shield.

  4. #4
    NHPacerPilot's Avatar
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    Thanks Steve and Frogdad. I made an order this morning.

  5. #5
    NHPacerPilot's Avatar
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    Wow, you guys are right! This stuff is very flexible and quite different from what's on the mags now! I better be careful stripping it though.

  6. #6

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    i made a video on how i was shown to neatly and easily strip and setup that white covered shielded wire... after doing it the hard way for decades....

    http://www.youtube.com/user/mcsrepai...11/J51MJEfyZD8

  7. #7

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    Mike - also had a look at your other videos - good stuff!

    And guess what I was doing yesterday - working out how to use ball bearing pulleys with 3/8 shaft. My lathe is not quite as sophisticated as yours but I will be able to do the same thing.
    Last edited by Curly; 08-26-2010 at 09:35 PM.

  8. #8
    NHPacerPilot's Avatar
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    Thanks Mike! That is extremely helpful!

  9. #9

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    Default Another Wireing Question

    Well Guys,
    Another question on wiring.
    My 0-320 in the Pacer has the Bendix S4-20 Mags that use the External P Lead Filters. I'm having a real hard time trying to understand how you hook up the P Lead on the screw side of the filter. I have the P lead to the mag hooked up.
    I don't understand how the shielding can be used to ground out the mag, if all you do is install a insulated terminal end to the wire and attach it to the screw. The shielding would just stop at that point and not make a complete circuit .My plan is to attach the shield to the post on the Bendix Mag switch with the other at the P lead. The switch itself would NOT have a ground wire to the post from to the airframe. I hope that makes sense to you.
    Here is the filter and drawing under documents. The drawing doesn't indicate what to do with the shield.
    http://www.aircraftspruce.com/catalo...lickkey=291290
    Thanks so much Guys,
    Jim ( the one with the hurting brain)

  10. #10
    pa20's Avatar
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    Default Re: Another Wireing Question

    Jim,
    I see in the drawing that they state that the shield will ground through the cap assy (items 2&3), but that only grounds the filter case. It seems to me that the P-lead shielding will still need to be grounded at the mag shell.
    Mark Ohlau
    PA-20 N7744K 2018 Donation Paid

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