When you look at a power cable of some sort, most people think of it as just a single wire. In almost every instance, however, it is actually two or more separate wires bundled together. For standard wiring, it will be two or three wires. One positive, one negative, and ideally, one ground cable. Each of these wires will be a different color so that it is clear which wire is which when being worked on.
More than Just Convenience
While having each wire within a cable be a different color is convenient for performing work on them, it also helps to improve safety. If a cable is damaged, for example, and an electrician wants to repair the cable rather than replace it, they need to be able to be certain that they are working on the right wires. If they mix it up and end up crossing the positive and the negative, it could result in a fire when the power is restored.
Preventing Future Problems Too
Not only can having properly color-coded wires help to prevent a problem immediately after performing a repair or other work on the wire, but it can help to ensure safety down the road as well. The ground wire, for example, isn’t always actively in use when there is power flowing through the positive and negative. Instead, it is only used if there is a short circuit or other situation where the electrical current needs somewhere to go because of a fault. If you don’t work on the ground wire properly, it could lead to shocks and fires in the event of a future issue.
Keeping Electricians Safe
While the power should always be cut before anyone works on any type of electrical wire, it is also important to ensure the electrician knows which wire is which. If they are working on a cable and don’t realize that it is a wire with a current, they could get shocked or electrocuted. Having color coded wires is one easy way to prevent this type of issue.