How often shall EMT conduits be securely fastened in place?

The correct answer is based on the National Electrical Code (NEC) requirements, which state that EMT (Electrical Metallic Tubing) conduits must be securely fastened at intervals not exceeding 10 feet. This fastening is crucial for ensuring that the conduit maintains its proper alignment and does not sag or become loose over time, which could create safety hazards or lead to damage to the wiring contained within.

The code specifies that EMT must be secured within 3 feet of each outlet box, cabinet, or fitting also, ensuring that the conduits are adequately supported throughout their entire length. Therefore, adhering to the 10-foot requirement contributes to the overall safety, reliability, and integrity of electrical installations.

Understanding this requirement is pertinent for anyone working with EMT conduit installations, as it helps maintain compliance with electrical codes and standards, ensuring safety in both commercial and residential environments.