Putting multiple electrical wiring into a cable tray is a way of “tidying up” a lot of wires or cables that run through the same area. Cable trays are widely used in building complexes, factories and processing plants. However, care must be taken in both the selection of the tray itself and the types and functions of the cables that are to be run through the tray. Some wiring is OK to be used as Tray Cable – other types might not be OK.
A length of metallic wire can be used to conduct electricity from one place to another. The size of the wire depends upon the amount of electricity or the amperage that has to be conducted. Often smaller diameter wire strands will be bundled together to form a larger diameter capable of carrying a higher current load.
Nearly always, the load carrying conductor requires insulation to stop the “escape” of electricity –i.e. shorting or returning to ground. The potential difference or voltage of the complete circuit decides how much insulation is needed.
Another regularly encountered requirement is to add an outer covering to protect the insulation from environmental threats. The combination of conductor, insulator and protector is what we call cable.
Have you ever noticed at home that electrical wires and cables seem to have a mind of their own? A veritable host of wires are hidden behind most TV receivers, hi-fi equipment and desktop computers and, no matter how carefully you position them, the next time you look, they are all in a hopeless tangle – how does this happen? Possibly no one knows
But, the sure way to avoid tangle is to practice good cable management. On the small scale domestic scene, cable ties are a good start in cable management. On the larger front in building complexes, etc the electrical consultant will probably specify cable trays.
What To Put In Your Tray
Some types of cable are designed to carry high power levels where others may only carry a very small amount of current. Generally speaking, it is not a good idea to mix high with low powered cable. Also, whenever separate cables run close to together, there is a risk of electrical “leakage” or crosstalk (electromagnetic interference) from one to the other.
Fire safety is another aspect to consider when specifying Custom Tray Cable for any project. Overheated conductors can cause fires but another area of concern is what happens if the outside of a cable in a tray is exposed to a fire? Will the current be cut off, will toxic fumes be given off; these are but some of the considerations.
Generally speaking anyone working with Tray Cable should be familiar with the guidelines published in the National Electrical Code (NEC). They should also discuss their requirements with their cable supplier and act accordingly.