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Wiring, Electrical & Installation
wire size FYI
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<blockquote data-quote="Steven" data-source="post: 83888" data-attributes="member: 544311"><p>Induced noise is noise that is inducted into your sugna wires by a nearby changing magnetic field. ie - the field around the power wire leading to your amplifiers.</p><p></p><p>ANY changing magnetic field can induce an electric current into a wire, hence why generators and alternators work. They either spin a field around a coil of wire, or spin a coil of wire inside a field.</p><p></p><p>Now you run your power and signal wires next to eachother. The magnertic feild surroundig the power wire changes EVERY time the amplifier needs a different amount of current, whether the demand has increased or decreased. This changing magnetic feild interacts with your signal wire and induces an electric flow through the wire. The amplifier picks up this electric flow and amplifies it. The amplifier now needs more current, to amplify this induced signal, which causes the amplifiers current requirements to change. More, or less, current flows in the power wire. The magnetic field around the power wire changes, inducing more, or less, electric flow in the signal wire. See a pattern.</p><p></p><p>Induced noise can be caused by running power and signal wires next to each other.</p><p></p><p>Now I know what one of you is going to say: HOW ABOUT THE GROUND? how do you keep your signal wire away from the car itself?</p><p></p><p>Simple - you don't.</p><p></p><p>For the amount of area the cars body takes up, the actual current flow through the small section that your signal wires are running along is barely existant - less than .001mA and creates a magnetic field only strong enough to pick up a molecule of dust, hardly enough to induce noise into a wire.</p><p></p><p>Just for a test, if you want, take a signal wire and wrap it around your alternator. Now start the car and measure the voltage fro one end of the signal wire to the other. Chances are you'll find that there is a current being induced into the wire. Probably greater than 6 volts. Now tell me that your power wire cannot induce a noise into a signal wire!</p><p></p><p>I know the laws of physics, electricity, magnetic fields, and EM radiation</p></blockquote><p></p>
[QUOTE="Steven, post: 83888, member: 544311"] Induced noise is noise that is inducted into your sugna wires by a nearby changing magnetic field. ie - the field around the power wire leading to your amplifiers. ANY changing magnetic field can induce an electric current into a wire, hence why generators and alternators work. They either spin a field around a coil of wire, or spin a coil of wire inside a field. Now you run your power and signal wires next to eachother. The magnertic feild surroundig the power wire changes EVERY time the amplifier needs a different amount of current, whether the demand has increased or decreased. This changing magnetic feild interacts with your signal wire and induces an electric flow through the wire. The amplifier picks up this electric flow and amplifies it. The amplifier now needs more current, to amplify this induced signal, which causes the amplifiers current requirements to change. More, or less, current flows in the power wire. The magnetic field around the power wire changes, inducing more, or less, electric flow in the signal wire. See a pattern. Induced noise can be caused by running power and signal wires next to each other. Now I know what one of you is going to say: HOW ABOUT THE GROUND? how do you keep your signal wire away from the car itself? Simple - you don't. For the amount of area the cars body takes up, the actual current flow through the small section that your signal wires are running along is barely existant - less than .001mA and creates a magnetic field only strong enough to pick up a molecule of dust, hardly enough to induce noise into a wire. Just for a test, if you want, take a signal wire and wrap it around your alternator. Now start the car and measure the voltage fro one end of the signal wire to the other. Chances are you'll find that there is a current being induced into the wire. Probably greater than 6 volts. Now tell me that your power wire cannot induce a noise into a signal wire! I know the laws of physics, electricity, magnetic fields, and EM radiation [/QUOTE]
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