What are the most common types of electric heaters used for bending PVC conduit?

The most common types of electric heaters used for bending PVC conduit are heating blankets or pads and hot boxes.

Heating blankets or pads are specifically designed to evenly distribute heat over the area of the PVC conduit that needs to be softened for bending. This uniform heat application helps to prevent damaging the conduit material and ensures a smooth bend. They are typically flexible, allowing them to conform to the shape of the conduit, which aids in achieving the desired angle or curve.

Hot boxes, on the other hand, are insulated containers that heat multiple segments of PVC conduit at once. They allow for controlled heating, ensuring that the conduit warms thoroughly before bending. This method is efficient, particularly when working with larger projects or multiple bends, as it maximizes the heating process and minimizes the risk of overheating certain areas.

Both methods prioritize safety and effectiveness, making them the preferred choices for bending PVC conduit in many applications. Other types of heaters mentioned in the other choices may not provide the same level of control and uniformity necessary for bending PVC, which is crucial for achieving the desired results without compromising the integrity of the conduit.