how to run the power wire

Discussion in 'Audio, Video & Gadget Tech' started by Burden33, Feb 10, 2012.

  1. Burden33

    Burden33 New Member

    Hey guys need help been looking at the truck to see where i can run my power wire for the amp and i cant seem to figuer it out, so how re you guys running them.
  2. Z-71

    Z-71 New Member

    Most run them through the factory boot...I didn't like that Idea,I wanted a more ''factory'' look so I found a good spot (in my case there was a dimple in my firewall) and drilled a hole then I installed this...

    It looks good and it is water tight,they also have a 0 gauge one there.
  3. tigersdl65

    tigersdl65 New Member

    You are gonna have to go through your fire wall most likely. Other solution is tho run it behind the front quarter panel into the cab the way, throught the door jamb, but youll be able to see it when you open the door.
  4. The Heater

    The Heater New Member

    Hi, Burden33:

    Mine in my truck is running through a dedicated hole and grommet. Depending on your current draw from the amplifier or amplifiers, you might be able to squeeze it through an existing hole. However, you want a short pathway, or relatively short, to the positive terminal of the battery. Make sure you have either a circuit breaker type fuse within 18 inches of the battery attachment point or fast blow fuse at that point. I use a circuit breaker so I can cut off the power at the battery to make any adjustments to the amplifier. In my new set up I will have more than one amplifier and will use an in line fast blow fuse near the battery and a fast blow fuse within 18 inches of the amplifier.

    You may want to check the grounding. Short ground wire to the sheet metal. Generally you don't want to ground more than one audio accessory to the same point to avoid a ground loop. You can improve your ground by checking the ground wire from the battery, making sure the gauge is sufficient, and maybe running an additional ground from the ground terminal to the chassis and engine block. You can also run an additional ground to the back where the amplifier will be and bolt it to the frame, then run a ground wire from there to the floor. You could then ground the amplifier to that bolt. Just a thought, not something everyone will want to do. I got this information from an experienced auto electric expert (not an audio installer).

    The ground wire for the amplifier should not terminate more than 18 inches from the amplifier.
  5. sstoner911

    sstoner911 New Member

    Mine runs from the amp to along the drivers side and then through the firewall....all company....
  6. The Heater

    The Heater New Member

    Keep Separate From Audio Signal Wiring

    General rule is to keep all electrical power wiring separated from all wiring carrying audio signals. This avoids radio frequency interference caused by the magnetic field generated by electrical current in the electrical wire. If practical, run audio signal wiring on one side of interior of vehicle, the electrical wiring on the other side.
  7. SurrealOne

    SurrealOne Former Member

    Thanks for that link. I'll be doing 1/0 AWG from the second battery to the center console for an inverter project at some point and will need something like this to get through the passenger side of the firewall to the engine compartment.
  8. zigger215

    zigger215 New Member

    Signal interference and loss is dictated by the quality of RCAs you use and that's pretty much it. There is a myth that you shouldnt run RCA cables next to your 12v power feed but it's only a myth. The truth is 14.4vdc doesn't create a large enough magnetic field around the conductor to distort signal generation. That's coming straight out of my EE undergrad schooling. And experience in the trade.

    You'll hear a salesmen say to run them separate the reason they do this is because of the shotty installs they see roll back into the shop, just thought I'd let you in on a trade secret ;)
  9. The Heater

    The Heater New Member

    Why don't you enlighten us with the written authority for what you are saying? Since you claim to be an "expert". Who is that authoritative figure that is making this statement?
  10. moogvo

    moogvo Moderator

    As long as you are using good quality shielded cable, you can run 'em side by side all day without any problems. Besides, DC doesn't generate much in the way of RFI... only when you have a problem with the diodes in the Alternator which will cause it to start making AC power...

    My qualifications: Upfitter/installer for emergency services vehicle communications and warning lighting systems: Fire trucks, police cars, ambulances, etc.
  11. zigger215

    zigger215 New Member

    Completely correct. As far as who I can use as a source, which book would you like me to pull it out of, besides that, harmonic distortion levels based on the strength of a magnetic field are calculated via formula and measured via amp clamp. I stand a good chance of winning some SQC comps this year, my rcas are run RIGHT next to my 1/0 my system feed, zero harmonic distortion :).
  12. The Heater

    The Heater New Member

    Shielded Cable

    Moogo: I agree if you have properly shielded cable you can run it side by side with power cables. There are situations where you can't avoid putting it next to power cabling.

    Zig: Any authoritative text, with proper citation will do. Give the Library of Congress info with it.
  13. zigger215

    zigger215 New Member Without scanning a book page (can't source it online) here is an online source you can read for yourself. AC fields create/cause interference, not DC. You still won't believe me but it's cool.

    P.S. read about how you can't technically "shield" a magnetic field.
  14. The Heater

    The Heater New Member

    OK, I just looked at what you provided. That link does not provide authority for what you are saying. You have training, I assume, to give you a fund of knowledge in this area. So give me a book a professor has used or cited where you are going to school. Or cite a law of physics or something else.

    Unless you are going to add "reading minds" to your list of qualifications, don't try to guess what I am thinking or will think.
  15. zigger215

    zigger215 New Member

    I'll post in a pm
  16. sstoner911

    sstoner911 New Member

    The one thing I have had problems with is RCAs running near any computer related modules. There is one in the kick panel on the passenger side in my truck that gave me fits...finally had to move the cable away from it. Didnt seem to matter on what shielded cable we used.
  17. moogvo

    moogvo Moderator

    Electronic modules can be a bear for audio, video and communications gear. Some of them pulse, some of them generate high amounts of RF. those that generate RF also generate harmonics and are not very well suppressed by the factory. Sometimes ya just gotta find a different route or add some electronic suppression of your own.

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