Romex® Cable Information
Romex® cables are used in homes and buildings to hook up power from the electrical panel to the lights and appliances throughout a particular home or building. The most popular awg sizes are the 14 awg, 12 awg and 10 awg so they are each specified with their own color. Romex® 14/2 and 14/3 come in a grey outer jacket, Romex® 12/2 and 12/3 come in a yellow jacket and Romex® 10/2 and 10/3 come in the orange outer jacket.
The reason for the color codes are because it makes it much easier for an electrical contractor to tell the difference of each cable just by looking at them. They also get phone calls from people in their homes about replacing a wire that may have been cut or ripped some how. So the easiest thing for them to ask is, What color is the wire? That way they can bring the correct Romex® wire with them to the job. There are many different types of electrical wire so it makes it much easier for the contractor to bring the correct items with them.
Anything bigger than the 10 awg Romex® comes in a white outer jacket. That's standard and you can't even request another color unless you want to buy a full minimum run of Romex ®. If you wanted a minimum run we could get that done for you with a 4-6 week lead time and a 50,000 foot run of wire. Otherwise, Romex® 6/3 and Romex® 8/2 all come in the same outer jacket color.
UFB cable comes in gray only. It's an underground cable anyways so having a specific color would be just about pointless. You can run UFB through conduit if you would like but you definitely don't need to. It was built tough for the rough outdoor weather so it will be able to handle just about anything that comes its way. UFB cable has the same inner wires as the Romex ® cable does. The both have THHN / THWN conductors with a pvc insulation and a nylon coating. You can also buy the THHN wire by itself if you need and run the wires individually. It may take a bit more time but you will save some money in the long run.
Please call with any questions you might have.