The answer to 'how long does junction box last' is that a properly installed and maintained junction box can last for decades. Junction boxes are designed to be durable and withstand the elements, and with proper care, they can provide reliable service for 20-30 years or more. However, factors like the quality of the installation, environmental conditions, and any physical damage can impact the lifespan of a junction box.
Junction boxes are an essential part of a home's electrical system, providing a safe and secure enclosure for connecting wires and cables. They are made from sturdy materials like metal or plastic and are designed to protect the connections from moisture, dust, and other environmental factors. With proper maintenance, such as ensuring the box is securely mounted, the cover is in good condition, and the connections are tight, a junction box can continue to function safely for many years.