Look for  RJ45 color code a , b and standard make a ethernet crossover cable or a straight throught cable , RJ45 or Registered Jack 45 , is the one of the most popular component in computer and communication network. Anyone working in networking field came across this connector every now and then. Because of this connector different devices talk with each other.
      
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RJ45 connector has a plastic body and inside it there are 8 conductor wires. This connector is used on both the ends of UTP cables. UTP cables having RJ45 at both end, is either a cross cable or straight through cable. There are 8 wires in every UTP cables, there is a pattern on how to place them in correct position in RJ45 connector to get desired functionality. This is achieved by following RJ45 color code scheme.

Color coding is a pattern that tells you how to place 8 UTP wires in RJ45 connector to get a working cable. There are two popular color coding standards TIA/EIA 568A and 568B. It's very important to get familiar with these two color code standards if you are working in networking field, as these color coding standards are used to make Straight Through and Crossover Cables.

We start the article by having a look at what TIA/EIA 568A & 568B color coding standards are and then we will see how this is used in making Straight Through and Cross Over Cable. These standards are used on Ethernet wires and can also be classified as Ethernet Color Code.

Following diagram illustrates T568A and T568B RJ45 color code standard. On left is 568B and on right is 568A color code standard. We look into each of this standard one by one.

In this article I will explain Cat 5 Color Code order , Cat5 Wiring Diagram and step by step  How to crimp cat5 ethernet cable standreds a , b crossover or straight throght
In order to use UTP(Unshielded Twisted Pair) cables you have to terminate both ends of cable across an RJ45 (Registered Jack 45) connector.

This article shows a Straight Through or straight Cable Color Code with  Wiring Diagram , In computer networking field, Straight Through Cables are used to connect different networking devices with each other. You have to use a Straight Through Cable while connecting a

• Router to Switch
• PC to Switch

Majority of patch cables used in networking world these days are Straight Through Cables.
UTP (unshielded twisted pair) cables are used to make Straight Through Cables. Following is diagram of how UTP cable looks like



Both end of these UTP cables are truncated at RJ45 (Registered Jack 45) connector.
We can see from above diagram of UTP cables that there are eight small wires in it, these eight small wires are twisted in four pairs. Each pair has different color scheme. In traditional 10/100 Mbps networks only two pair of wires are used for sending and receiving, while in new gigabit standard all four pairs are used for data transmission.
To understand how these types of cables work, it's important to have sound understanding of Straight Cable Color Code.

Standards of Straight Cable color code :

There are two color coding standards for straight through cables, these are EIA/TIA 568A & 568B. These color coding standard tell which color is connected to which end. We now look at details of these wiring standards.

T568A Color coding Standard

This color coding standard is not widely used these days. Below is diagram of straight  cable color coding based on 568A  standard.



Next we illustrate sending and receiving pins in 568A color coding standard.

Pin No   Wire Color Transmitting/Receiving
1       White/Green Transmitting
2               Green Transmitting
3         White/Orange Receiving
4                 Blue -
5          White/Blue -
6              Orange Receiving
7        White/Brown -
8              Brown -

 T568B Color coding Standard

This is the most widely used color coding standard of current era. Almost all  Straight through cable these days are following T568B color coding standard. Below is straight through cable color code and  wiring diagram that is using 568B standard.



Next we illustrate sending and receiving pins in 568B color coding standard

Pin No Wire Color Transmitting/Receiving      
1        White/Orange Transmitting
2             Orange Transmitting
3      White/Green Receiving
4                 Blue -
5        White/Blue -
6                Green Receiving
7     White/Brown -
8              Brown -


It's called straight through cable since all wires are connected at same pins on both sides of wires. You can see that in both figures of 568A as well as in 568B.
There is not much difference between 568A and 568B, you can see from above diagrams that only green and orange pairs are swapped, rest combination remains same.
An important point to remember is that whether you use 568A or 568B, make sure both ends of wire is following same standard. Which means if one end of wire has 568A standard, other end must also have 568A and vice versa.

Automatic Medium-Dependent Interface Crossover (Auto-MDIX)

Today's devices are getting intelligent, due to introduction of Auto-MDIX standard. With Auto-MDIX, devices can automatically adjust sending and receiving pins. So any wire can be used for connecting same or different devices.


Are You Interested in a :

• Crossover cable color code
• Rj45 cable wiring Diagram

look for a Crossover cable color code with a wiring diagram for rj45 Crossover Cable or Cross Cable is a type of Ethernet Cable that is used to connect similar types of networking devices, in contrast to Straight Through Cable which is used to connect different devices. For instance, you need cross cable if you are connecting

• PC to PC
• Switch to Switch
• Router to Router

To understand Crossover Cable working, it's important to understand the crossover cable color code i.e. pattern in which wires are connected to RJ-45 connector. We start by looking at the diagram.

Crossover Cable Wiring Diagram

We can see in the above diagram that the left side is following 568B color coding and the Right end is following 568A color coding.

Crossover Cable Color Code TIA 568B

The following Table illustrates TIA 568B color coding scheme which is applied on the left end of the cable in Crossover Cable Wiring Diagram.

Pin No Wire Color       Transmitting/Receiving
1        Orange/White       Transmitting
2          Orange               Transmitting
3       Green/White       Receiving
4          Blue                    -
5      White/Blue                    -
6       Green               Receiving
7      White/Brown            -
8       Brown                    -

Crossover Cable Color Code TIA 568A

This color-coding standard is applied on the right end of the cable in Crossover Cable Wiring Diagram.

Pin No   Wire Color Transmitting/Receiving
1        White/Green Transmitting
2         Green         Transmitting
3      White/Orange Receiving
4            Blue              -
5     White/Blue              -
6       Orange         Receiving
7     White/Brown      -
8       Brown              -

To make a crossover cable one end of the UTP cable has to follow either TIA 568 A or B Color coding, while the other end must have different color coding. In short, both ends must have different color coding schemes. Use the following guidelines while making the cross cable.

• If one end of the cable has 568A color coding then the other end must follow 568B color coding. 
• If one end of the cable has 568B color coding then the other end must follow 568A color coding.

This is different than straight through cable in which both ends of the cable must have the same color-coding standard at both ends, look for a Straight cable color code.

Why to Use different oF crossover cable color coding

As in UTP, there are eight wires twisted together in four pairs. In Fast Ethernet pin 1 and 2 of the RJ-45 connector are reserved for transmission while pin 3 and 6 of the RJ-45 connector are reserved for receiving. As pin 1 is transmitting so it cannot be connected to pin 1 at the other end since that too is transmission mode. It follows that pin 1 should be connected to pin 3, which is in receiving mode.
To sum up pin 1 and 2 from device A is connected to pin 3and 6 of device B, while pin 3 and 6 of device A are connected to pin 1 and 2 of device B.
It's named crossover cable since wires are cross-connected at both ends of RJ-45 connectors

Automatic Medium-Dependent Interface Crossover (Auto-MDIX)

It's important to have a good understanding of color-coding schemes in crossover and straight-through cable but today almost all networking devices support Auto-MDIX, by which devices can automatically detect which cable is required and switch to it automatically. So if you are connecting similar devices and you only have a straight-through cable, you can use it.

The pic below shows the electrical outlet GFCI wiring diagram and step how to wiring multiple outlet gfci  (round-fault circuit interrupter) with color code

What is GFCI Outlet ?

What is GFCI so it means “ground-fault circuit interrupter” which works mainly as to protect human or device also from connected to electric shock from electrical power. It is also called Residual Current Device (RCD) that shuts off an electrical power circuit detecting that undesirable path is following by electricity like through water or any living thing.

Also we have to define GFCI from NEC as “a device or instrument as shown below works for protection of any connected personnel which disturb the function of electricity to some circuit or another device”.

Purpose of GFCI :

Ground Fault Circuit Interrupter GFCI is a device which secure person from electric shocks from faulty currents in the electrical devices we use in our daily lives. It works by comparing the input current on the ungrounded side (red-wire) to the output current on the neutral side (black-wire).

GFCI Outlet Wiring Diagram :

In the GFCI mainly two wires connect as also shown in a diagram, the current flowing from the source and coming back are some due to current laws. So GFCI designed as checking the difference between the current leaving and returning through current transformer of the GFCI to protect device exceeds 5mA. The wiring diagram also shown below as follow;



This shows 2-wire 14 gauge cable with grand wire having supply of power supply and connected GFCI. So, the solid-state-circuitry opens the switching contacts and de-energizes the circuitry as shown in the figure2 also. This will happens when GFCI is in on-conditions and when it fails to work the switching contacts remain closed and the device still giving the power with zero protection as to us. So also dangerous when fails. While damages occurs from voltage sparks from lighting and other transients.

 GFCI and light switch Wiring Diagram :

We are now studying wiring of GFCI and how it connects to light the bulb as also shown in figure below



SO there is a power supply supplying power to the circuit while black wires shows ground currents and white shows the non-grounded wires or called HOT wires. While green wires are for removing faulty currents to ground for device protection. As 2-wire cable with ground connect to the other side of GFCI so connected both the protective sides of GFCI to the device for protection of both a device and a person using it from any circumstances and shock from electricity as shown above in the figure above.
We have two types of wirings as single wiring as discussed above and another one is multiple GFCI wiring and we also attach the diagram to show how the wiring is done by designer or electrical engineer.

Look for a house Electrical wire color code guide: This article describes the new electrical cable color code wiring diagram ac and dc in United States,uk,Canada,Europe for single phase or three phase In Electrical engineering, different wires have different color codes. This makes it easy to differentiate and identify each wire .In diagram the live wire has a different color from the neutral wire and the earth wire. It is also useful for separating the three phases for three phase connections. And most importantly, it is good for safety purpose. The properties of one wire could be different from the properties of another and misplacing connections could be fatal to personnel handling the connections. The color coding convention in Europe is different from that of the United States, canada , united kingdom and australia.

For 277/480 V AC power, the neutral power is colored gray while the earth is colored green, bare and striped green and yellow. The phase 1 is colored brown, phase 2 is colored orange, the phase 3 is colored yellow. The 277/480 V AC systems are usually used for industrial equipment and motors.


The color code convention for each region should be followed. It will prevent electrical shocks due to wrong identification and inappropriate connections. When you are faced with a tangle of wires and you need to do or repair some wiring, take note of the house electrical color coding wiring of that country.

Uk electrical  power cable color code wiring diagram :

The United Kingdom and Europe use the same color coding while the United States has its own color coding convention. Indicator lights on panel boxes usually use this same color coding convention. It must also be noted that older connections may use different color codes



 -  single phase wiring, the united kingdom color code :

•  Brown color for single phase
•  Blue color for neutral cable 
• Green with Yellow Stripe for the earth/ground cable.

 - three phase wires  :

• Phase 1 - Brown
• Phase 2 - Black
• Phase 3 - Grey

Canadian Electrical Cable Color Code Wiring Diagram :

- Single phase canadian color code

• Single Phase 1 - Black or Red (2nd hOT)
• Neutral - White wire
• Ground - Green with Yellow Stripe

- Tree Phase canadian color code :

This article shows 4 ,7 pin trailer wiring diagram connector and step how to wire a trailer harness with color code ,there are some intricacies involved in wiring a trailer. Some trailers come with different connectors for cars and some have different wiring styles. If you follow our trailer wiring diagrams, you will get it right. Some connectors are 4-pin while some are 7-pin.

4 pin trailer light wiring diagram :

4-Pin Connectors