RGB strip light has a
For LEDs, the red wire should be positive and the black wire negative. That's it.
Pixel strip power cables are designed to be used with pixel strip lights. If there is an area where the pixel LED string is over 30 lights, you'll need to use an extension cable, or pixel power injection cable for an extra injection of power from the same PSU.
We recommend using stranded copper wire 10-22 gauge.
One wire is the anode (positive) and another is the cathode (negative). The two wires have different names because LEDs only work in one direction and we need to keep track of which pin is which. One goes to the positive voltage and the other goes to the negative voltage.
There are two wires called leads attached to an LED. One lead is slightly longer than other. While connecting to the LED to the circuit, the longer lead is always connected to the positive terminal of the battery and the short lead connected to the negative terminal of the battery.
The colors of the wires are red, black, and white. Red becomes the first positive with black the second positive. The white light becomes ground. The 3 wire light can best be installed as a blinker and brake.
US AC power circuit wiring color codes
The protective ground is green or green with yellow stripe. The neutral is white, the hot (live or active) single phase wires are black , and red in the case of a second active. Three-phase lines are red, black, and blue.
Light Emitting Diode (LED) Polarity
It is very important that LEDs are connected to a circuit in the right direction. The current flow can flow only from the ANODE (+) terminal to the CATHODE (-) terminal.
They are as follows: Red – Red cables carry the positive current. Black – Black cables will be the negative cable. Grey or White – Grey or white cables are the ground wires.
In a common cathode RGB LED, all three LEDs share a negative connection (cathode). In a common anode RGB LED, the three LEDs share a positive connection (anode). This results in an LED that has 4 pins, one for each LED, and one common cathode or one common anode.
LEDs are wired in series-parallel just like the traditional bulbs we described above. Unlike incandescent lights, however, LEDs do not typically make use of shunts.
These 4 pin connectors are used to connect RGB LED strips to an RGB controller. Each RGB LED strip includes one of these. If you cut your LED strip, you can purchase an extra 4 pin connector to connect the second half of your strip to an RGB controller.
In short a 2 wire (4-20mA) instrument is powered by the current loop. A 4 wire instrument is powered by an external supply. That is the main difference.
The white will normally be the ground(-) and the black will be the positive(+). LED Lights with 3 wires will be a multi-function light. They can (most times) be used in whatever configuration is right for your application. For example, running and brake, running and blinker or brake and blinker.
Normally you will have 3 cables, loop in, loop out & switch wire. However a fourth cable is sometimes looped in to provide power for example, to a loft lamp.
In LEDs, the longer lead is always connected to the positive terminal and shorter lead is connected to the negative terminal.
To make it easier to identify the leads, all LEDs are manufactured with two physical properties. The first is that LEDs have one lead that is longer that the other. This longer lead is the anode (+), and the shorter one is the cathode (-). The second feature is a small flat notch on the side of the LED.
Generally speaking, most LED lighting uses a series-parallel combination. Ideally, for reliability and lighting consistency, it would be best to have one strip of LEDs all wired in series to a constant current driver.
As mentioned before, the live wire is usually brown, the neutral is blue, and the earth is green and yellow in Australia.