Low Voltage Utility Cables
Low voltage power basically refers a voltage range between 600 v to 2000 kV. The utility is low because the load demand doesn't consume more power, therefore it benefits the consumers when appropriate electric connections are done in order to reduce the electric bill. Wrong use of cables can lead to huge unnecessaryaccrued bills. Another problem is that it leads to delivery of current above the rated amount, this is dangerous because it could cause bow out of electronic appliances. And in some cases, use of wrong cables can lead to delivery of voltage below the rated amount, consequently causing inactivity or malfunction of the devices.
The low voltage utility cables are intricately made in a way to fulfil the requirements set for them. Their structural design therefore are very different from other cables. These structural differences can make it easy to earmark a low-voltage cable without being misguided.
The jacket of the low voltage cable is made from Polyvinyl chloride (PVC) which is appropriately colored and has low-temperatures adaptations. These jacket act as insulators and are always extruded over each conductor cable.
When a core is made up of a twisted assembly, that is to mean, it has more than one live cable then all the aluminum conductors will use only one neutral. With this type of arrangement, single, two or even three phase conduction can be done. Each of the conductors are insulated with polyethylene (XLPE).
Insulation is the safety method for preventing life hazards which may come when the interface between the live electricity and user is not safeguarded. Insulation doesn’t only prevent injuries caused by poor interaction with live cables, it also prevents interaction between live a neutral which result into a fatal short-circuiting especially for three phase system. Insulation also prevents water from entering the conducting cables. An insulation materialtherefore has to be moisture resistant, resilient and tamper proof. Crossed-linked polyethylene (XLPE) has low temperature, moisture resistant and has high dielectric strength. It is one of the most eminent insulation material because it formulates a balance of flexibility and mechanical resilience.
When doing the installation, it is appropriate to cross-check the modalities and the right choice for your installation. Here are given some of the methods of installation
- Conduit in Air. This method is where the cables are lied in a conduit which is then suspended in air. It is mostly used in the overhead conduction.
- Direct burial is a method where cables are directly lied into the earth without putting some conduit. This method is only safe and convenient for indoor cable installation.
- Underground duct method involves creation of a duct in the ground within which the voltage cables are lied. It seem very protective and creates neatness for congested areas like cities.
The condition of the area, like its wetness or dryness must be given consideration during installation. Besides that, the temperature and the secondary utility should also be made clear.
Aluminum is the best conductor because of its many outstanding qualities needed for electric transmission.
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