Q:Can we use pilot wire protection to protect overhead line, and which country use this scheme ?

Pilot wire protection can be used anytime anywhere. The question is not where it is used but why, and is it required. Pilot wire protection provides better discrimination of fault location, than, say, an impedance or distance relay. If the zones are too close, pilot wire may be the only feasible solution. .

Q:Is there anything else I could use to solder things without buying whole long spool of soldering wires? I mean like the wire inside the TV antenna cable from 99c store or nails and etc. ? Something I could use single time.

Are you asking about solder itself, or the wires used to join things together with solder? You can use any wire that meets the current load requirements to put in a jumper wire. does not matter where it comes from. Yes, old TV wires and such can be used to make a jumper. You have to know what current goes through it, if it's a power wire, so it does not overheat or burn up. Otherwise, all signal type wires (analog or digital signals), can use just about any size wire if there is no real heavy current in them. As for Solder, there is no real way to get around that - you have to use solder to fix a soldered connection. Always pre-tin the new wire first (melt solder on wire first, and clean off excess solder). Then heat the connection and wire equally at the same time and touch the solder between the wire, connection and solder tip. The wire has to be hot enough to melt the solder - do not put the solder in the solder gun tip alone, that won't flow properly...

Q:I recently bought a set of DT Moto emergency lights for my pickup and after installing them i found when i went to wire them to my battery the wire was too short. I didn't install the grille lights just the visor. Could i cut wires from the grille set and wire them to extend the visor light wire?

I'm looking online to find out what DT Moto lights are. Ok, I see what they are. I didn't know the brand name. LED lights in general are not high current, so they probably use lamp cord. I want to explain something to you about polarity. Electronic circuits are sensitive to the polarity of the DC electricity. The positive (+) and the negative (-) connections must be observed. So many people have absolutely no clue about this. There are just two wires. But if you extend them, you have a 50-50 chance of wiring correctly or incorrectly. There is only one allowable way. If wrong, it WON'T work, and probably will blow up the circuitry. So connection to battery or cigarette lighter plug is extremely important not to reverse the polarity. If just the LED lights got reversed, they wouldn't light, but they wouldn't be injured. Just reverse the wiring. But to the 12 volt source, polarity can't be wrong. Not for an instant. If you look closely at the insulation, you will see that one wire has smooth insulation, and one wire either has milti-ribbed insulation, or a single rib down the side. If you extend wiring, make sure to connect smooth to smooth and ribbed to ribbed. Wires should be soldered with electronic solder and the joints covered with heat shrink tubing. No crimped barrel connectors, or twisted bare wires with tape, or house wiring wire nuts. These methods all beg for failure. I don't know about robbing wire from one place and connecting to another. Is the one wire actually too long? You'll never need it? I guess you could take it. But me personally, I'd go get some wire from a lamp store. Match the wire conductor gauge (size), not the insulation size. Most lamp cord is 18 gauge. Some is 16 gauge. You can get 14 gauge or even 12 gauge. Thicker is a smaller number. Places that install car audio systems often have/sell thicker lamp cord. Have I told you enough?

Q:But when I look closely (you can't see it in the picture unfortunately) there are some tiny wisps of the coiled copper wire that looks as if it could have been connected to the pulled wire. I'm not sure.How do I connect the wires to make the headsets work again?If you guys need more pictures, please tell me.Thanks in advance!

don't be afraid to cut the wires, those wires are no good, strip out a fresh strand of wire, just make sure you remember the color coding of the contacts before you cut the wires, be warned though, working with earphone wires can be tricky, the solder is very hard to bind on the tips of the wires and the fibers are a pain, if you know how to solder then that's fine, but if you don't ask help from someone who can

Q:anybody got a diagram or instructions on how to wire an amp wiring kit in a 1999 audi a4

yeah just the way my buddy there say it but the small wire goes with remote control wire of the radio when tunr on the radio the amp comes on too!

Q:And i am unsure on how to wire the speakers. Do i just splice the wires from the speakers to the corresponding wires on the harness. P.S. It is not actually in a boat, it will be connected to a 12v battery.

U JUST RUN THE HOT(RED) WIRE TO THE BATTERY. U ALSO MIGHT HAVE TO HOOK UP THE MEMORY WIRE(YELLOW WIRE) AND THE REMOTE ( SOLID BLUE) WIRE TO THE POSITIVE TERMINAL OF THE BATTERY AS WELL BEACAUSE SOME RADIOS WONT TURN ON WITHOUT THESE WIRES COONECTED. THE WHITE AND GREY WIRES ARE THE FRONT AND THE GREEN AND PURPLE ARE THE BACK SPEAKERS. YOU SHOULD GET THE WIRING HARNESS FOR THE WIRING IF ITS GOING IN A CAR LIKE A JEEP THEN ALL U GOTTA DO IS MATCH THE COLORS UP ITS EASY . BUT STRAIGHT TO A BATTERY DO IT THAT WAY JUST MAKE SURE U HAVE A GOOD GROUND.

Q:Why is thin strand wire better for powering car audio?

It's purely for flexibility. Solid wire would be just as effective, but it's about impossible to route through a car. In response to Rolo's answer -- Skin effect is a high frequency AC phenomenon - not an issue with DC, or any frequency in the audible spectrum for that matter. High strand count in car audio wire is purely for flexibility.

Q:i think i messed up the wiring to my headunit. its not the wiring going into the headunit, there is no power from the wires. how much should it cost to get the wires checked out and fixed somewhere?

If your talking about the power wire the feeds the radio on the eclipse then you need to check both fuses. On the eclipse they put an in line fuse before the fuse box and one at the fuse box and either one could be blown. If neither one is blown then you do have a break in the wire. does not half to be cut but it can be an internal break. If i was you and the fuses are not blown i would run your own wire from the battery with an in line fuse to your radio. This happened to me so that's how i know about the two fuses. hope this helps.

Q:I am installing a Pioneer head unit in a 1997 Nissan Pathfinder. All the wires from the harness to the deck are connected according to color. I was able to connect all of the wires except for the stock orange/black wire coming out of Nissan's harness. I am assuming this wire has something to do with the illumination. The pioneer does not have an orange/black wire to connect it to. The deck will not turn on at all if the orange/black wire is:- not connected to anything- connected to the red power wire- connected to the yellow power wireThe deck will turn on if the orange/black wire is:- connected to the black ground wire- connected to the remote wireHowever when the headlights are turned on the head unit cuts off and will not turn back on until the headlights are shut off again. In other words, the deck will work fine until the headlight switch is turned to the on position. Does anyone know a solution to this problem?Thanks, Dan

This link may not be accurate... The only wire I see in the first link which is close in color is the black/yellow wire for the left rear speaker ground....no black/orange combo shown. Factory ground wire should be grey...test with a test light to confirm Constant power is pink....test also Switched power is blue...test also Once you confirm which wires are power and ground, hook those up to the deck wiring and then run the speaker wires to the proper ones on the factory harness. You can't always connect the same color wires from an add-on deck unit to factory wiring....wiring colors will differ. Consult the installation instructions or call the deck manufacturer tech assistance hotline. Make sure you have the correct wires from the deck hooked up to those factory wires....I'm thinking you have the wrong wire hooked up to the rear speaker ground or deck ground and the unit will only ground when that wire is activated somehow when the light switch is on.... /blue? is the factory illumination wire according to the first link. Have you got that hooked up wrong with the deck ground or speaker?

Q:I have a set of two rotating beacon lights on my truck. I would like to wire these directly to the vehicle with an on/off switch. I picked up a two prong toggle switch from autozone, as well as some wire. I'm not sure how I need to do the wiring. I read somewhere about running wire from the fuse box? And how about grounding?

Truck Beacon Lights