True or False: Expansion, expansion-deflection, or deflection fittings are required in raceways to compensate for thermal changes.

The statement is true because expansion, expansion-deflection, or deflection fittings are essential in raceways to accommodate thermal expansion and contraction of conductors, cables, or the raceways themselves due to temperature fluctuations. Materials expand when heated and contract when cooled, which can lead to undue stress and potential damage if not properly managed.

Using these fittings allows for the safe movement of the conduit, preventing issues such as buckling or fracturing that might arise from thermal changes. This practice is crucial in maintaining the integrity of the electrical system over time, ensuring that connections remain secure and functional despite temperature variations.

These fittings are typically specified in electrical codes and standards to ensure compliance with safety regulations and to support the longevity of the installation. By incorporating these components into the design, engineers and installers can effectively manage the physical and thermal dynamics of electrical raceways.