Final answer:
The cords on electrical items/devices are usually contained using plastic insulation. Plastic acts as an insulator, preventing electric charge from escaping outward.
Step-by-step explanation:
The cords on electrical items/devices are usually contained using plastic insulation. Plastic acts as an insulator, preventing electric charge from escaping outward. The plastic insulation helps to protect the cords from damage and minimize the risk of electric shock.