What does the support spacing for PVC conduit depend on?

The correct answer regarding the support spacing for PVC conduit is related to the size of the conduit. The National Electrical Code (NEC) specifies that different conduit sizes have varying support spacing requirements to ensure stability and safety. Larger conduits typically require closer support intervals to prevent sagging and to maintain structural integrity, while smaller conduits may have more lenient spacing guidelines.

Understanding that the support spacing is calibrated to the size of the conduit helps ensure that the installation can withstand environmental and physical stresses, such as weight from the internal conductors or external impacts. By adhering to these specifications, electricians ensure that the conduit remains securely in place throughout its operational life. This aspect of conduit installation is crucial for compliance with safety standards and for achieving a durable installation.