It can be very confusing and complicated trying to understand the different sizes and shapes of power cables, as there are various different types ranging from single conductor and multi conductor versions, as well as personal and industrial style power cables. Each of them are designed for specific reasons and for different purposes, each of which are vital in the type of role they may play.
Single conductor power cables can play important roles with welding, locomotive, entertainment and stage lighting cables often having a purpose for power cables. All of them vary in differences to amps, voltage, insulation types and flexibility options, which each determine the price of the cable.
The cheapest of the power cable range is often considered to be the welding cable. This is also considered to be the most popular of the power cable range, as it is made up of flexible copper strands and a rubber jacket that is rater 600 volts.
The DLO cable is similar, but is not as flexible, and carries 2000 volts with tines copper strands and a rubber jacket. The only issue with having a DLO cable setup is that it is much less economical due to the fact that it carries much more power. It is important to consider why you need a cable and what is most suited to your specific application.
There are multi conductors available that come along with portable cord, SOOW cables Type W, Type G-GC and even extension cords. These usually have a rubber jacket covering up the wire in order to help it be resistant to outdoor weather and general wear and tear that it could be exposed to. They are usually rather flexible, but can come at different levels of flexibility depending on what it is going to be used for. Some also come with a different range of more rugged and less rugged jackets that offer different levels of protection.
It is not wise for someone with very little knowledge to make big decisions in regards to selecting wiring, so it is important to do your research, speak to a professional and ask for advice from salesmen and electricians before installing your choice of power cable.