Some underground systems require two phase transmission and distribution configurations. For these cases the right type of cable to use is the triplex cable which has two live conductors and one neutral. Underground installation is different from aerial installation, therefore as an electrician, knowing the difference helps you choose the right conductor to use. Conductors which are not meant for underground installation may mess up your system if used because there is a lot of dynamics involved in installation which cannot be underrated. Do a profession job in your installation and prove to your client that you know and understand what you are doing as an engineer or electrician.

Structure 
Complete cable is made up of two phase conductors and one neutral. These conductors are insulated with polyethylene material. The insulation helps in reducing conductor damage and also reduces exposure to risk of electrocution. The three conductors in the cable are twisted to form a triplex configuration. These conductors are assembled such that they form a concentrically configuration. But some cases, the conductors are laid in a parallel assembly according to specifications.

The conductors are made from aluminum alloy called 1350-H19, where more than 99 per cent of this alloy is pure aluminum and then traces of zinc, silicon and copper. The reason for addition of these elements into aluminum alloy is to boast its resistance to corrosion and enhance the tensile strength. The manufacturing procedures are approved, the tests against the cable according to ANSI and ICEA standards are justified.

Insulation
Aluminum underground triplex cable like any other underground cable has to have a stable and robust insulation system. Insulation which provides protection against any ill, resists damage during installation, prevents human sabotage and protects users from electric injuries. This cable's insulation is made from Polyethylene material which is cross-linked and is extrusive. The insulators for the conductors are all black with exception of the neutral insulator which has three yellow stripes for ease in recognition.

Features and Operation
Both direct and in duct installations can be done using the Aluminum underground triplex cable. The robustness of the jacket and suitability of the insulation make a reliable cable for all underground installations. Besides, this cable has a resistance to abrasion, can withstand sunlight effects and tough enough to repel any mechanical damage. According to the NEC compliance provisions, the conductor can operate in a location wet or dry with a maximum temperature up to 90 degrees Celsius.

Aluminum underground Triplex Cable is designed for secondary distribution, where power is received from transmission line by a transformer is reduced to fit a utilization voltage which is safe for residential consumption. This cable serves systems that consume up to and not more than 600 volts.

Many options for the cable are available from the store, it is therefore upon the user to understand which system he/she intends to install before making an order for these cables. The depth of the burial, the service period, area of span, capacity of current needed and size of load are some basics which need to be considered when choosing your cable.

The efficiency of the conductor inspires me and I ask you to try out this cable for your two phase underground installation and you will never regret. As you’ve read, it is very reliable, weather resistant and you can be sure it will serve you for many years without inconsistencies in power flows or blow-outs.

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