Ultracab is a renowned manufacturer and supplier of GPT wire in India. GPT wire is a general circuit wiring designed for standard electrical usage in fleet vehicles. The PVC is heated and extruded through a die and onto bare copper wire, serving as insulation
that can accept up to about 60 volts and 185 degrees Fahrenheit. It can't generally take a lot of exposure to liquids or the kind of strain that other types of wire are built to endure. You're often going to find GPT where it's unlikely to be exposed to the elements, such as wiring together the interior lights in the cab, for example.