According to the National Electrical Code (NEC), PVC conduit is not required to be glued if it is properly supported. The code states that "PVC conduit shall be securely fastened and supported in accordance with the following spacing requirements: For sizes trade size 1/2 inch or less, at least every 3 feet For sizes trade size 3/4 inch and 1 inch, at least every 4 feet* For sizes trade size 1-1/4 inch and larger, at least every 5 feet"The code also states that "PVC conduit shall be joined by means of solvent cement, threaded fittings, or other approved methods." So, while gluing is not required, it is an approved method of joining PVC conduit.There are some advantages to gluing PVC conduit. Gluing provides a strong, permanent bond that is resistant to water and other chemicals. It also makes it more difficult for the conduit to come apart in the event of an earthquake or other seismic event.However, there are also some disadvantages to gluing PVC conduit. Gluing can be time-consuming and messy. It also requires the use of chemicals that can be harmful if not used properly.Ultimately, the decision of whether or not to glue PVC conduit is up to the electrician. There are advantages and disadvantages to both methods, and the electrician should weigh these factors before making a decision. Flag for review