When choosing the appropriate aluminum cable that matches your specific needs, you should put many factors in to considerations. First and foremost is the cable size. Cables are normally categorized in to sizes. The aluminum cable is basically graded in to the AWG sizes. A standard used in North America for naming wire gauges. It is advisable to select the appropriate aluminum cable size that matches your specific needs. Smaller cables deliver small amounts of current hence you should check the voltage rating of your application before buying a cable.
Furthermore oversized cables may cost you more and still deliver the same current compared to properly sized cables. Another factor to put in to consideration is whether it is a SEU cable or SER cable. Even though both are Service Entrance (SE) cables but there is a slight difference. SER cables have a reinforcement tape while SEU cables have an overall reinforcement all together with a neutral tape. SEU cables can be used in applications of 600 volts and below while SER cables are used only in applications rated at 600 volts.
There are also other various types of aluminum cables to consider before buying a roll, as mentioned earlier they include type RHW-2, USE-2, RHH, XHHW among others.