After determining the purpose of the electrical cables, you should analyze the standards that the cables follows. For example, check if there are any certifications that are affiliated with reputable standards organizations. If they are, it means that the cable were made under a specific safety and performance criteria. Also, remember the grade of the materials used. Their insulation type matters too. For instance, if the cables are made of copper or aluminum, then the cables grade will greatly enhance their conductivity while also minimizing the amount of resistance. Lastly, assess the manufacturer directly, their image and warranties tell a lot about the reliability and lifespan of the products.