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What is USB Cable and the Color Code of Wire Inside

Updated on July 2, 2017
I took a picture of my USB cable on the floor. This is a USB cable for my VideoCam at home.
I took a picture of my USB cable on the floor. This is a USB cable for my VideoCam at home. | Source

USB stands for Universal Serial Bus

Now, know the basic of USB Cable and the Color Code of Wire Inside. USB cable has the USB interface for USB port on your PC, the wire itself and a particular device interface depending on size and type of device.

USB stands for Universal Serial Bus.

If you try to look at the bigger USB interface designed for your PC, it has four shining pins.

Those pins have corresponding codes and functions.

The four pins or four terminals are connected to the four wires of the USB cable wire itself down to a particular device interface or the tip of the USB cable.(the tip that is to be inserted to your device)

USB flash drive memory of 1 gig capacity
USB flash drive memory of 1 gig capacity | Source
bronze wire inside the four wires of the USB, you can see the color coding in the links below
bronze wire inside the four wires of the USB, you can see the color coding in the links below | Source

USB Wires Have Color Coding

Slicing the cord wire of USB cable exposes the four wires inside.

Common USB wires inside a USB cable are red, black, white and green.

These wires have color coding:

The red wire inside of that USB cable is the DC voltage about 5 volts which will only function of course if you complete the circuit with the ground wire which is the black one.

Red is the positive wire and black wire is the negative wire or ground wire.

USB powered devices in your computer rely on these two wires.

You can even make a blower or a small fan around your PC table just by connecting the two wires to your spare exhaust fan with 5 volts.

Your webcam at home is powered by these two wires.

USB to USB cable

A device in USB to USB cable is the common way these days to move files, copy files and delete files easily. USB adapter or the USB port is the place where USB device met and inserted to each other for proper connection.

USB Cable type

The USB Cable has also two other wires for data transfers. We know that red and black supply the power so the white and green are wires for data or file transfers.

USB 1 has slower data transfers compared with the latest USB 3 version.

White wire inside the USB cable is for the data transfer in positive or DATA+ and the green wire is for the data transfer in negative or DATA minus.

USB type A to a cable in terms of USB cable implies type A USB cable, the rectangular type cable interface.

This is not actually a good connection because this might harm your PC especially if you connect PC to PC.

USB spliced cable
USB spliced cable | Source

USB cable comes in different wire sizes and lengths.

I have bought a 10 foot USB cable for my LCD projector at home.

Be aware that the longer the USB cable the lesser the signal or operation works.

This is because of resistance factor.

Have I answered the question, what is a USB cable?

It is simply a kind of cable that transmits from and to your PC and your device.

Just remember, in the world of technology, be logical in your operation.

If you see a shape, figure or form, be smart enough to reason out that the particular device has a right fitting or proper fitting to its proper place.

If you see a rectangular shape then it should be fit and inserted to a rectangular slot also.

How long have you been using USB?

See results

© 2013 Mark Johann


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