Why are pull boxes necessary when installing conduit with multiple right angled bends?

Pull boxes are essential in conduit installations, particularly when multiple right-angled bends are involved, because they provide a crucial access point for managing and protecting the wires running through the conduit. When wires have to navigate sharp bends, the risk of damage increases due to the added stress on the cables, which can result in kinks or insulation wear over time.

A pull box serves to provide a straight section of conduit that allows for easier wire pulling and can also be a space to disconnect or terminate wires safely. This reduces the likelihood of injury to both the wires and the installation itself, ensuring that the electrical system operates safely and effectively. Moreover, they allow for easier maintenance and troubleshooting in the future without needing to dismantle longer sections of conduit, which contributes to the overall durability and longevity of the electrical installation.

While other aspects like cost, installation simplicity, and aesthetics may come into play in different contexts, the primary purpose of pull boxes in this situation is firmly centered on the protection and management of cables running through conduits.