Which of the following statements about electricals must be true regarding the installation of raceways?

The correct statement regarding the installation of raceways is that raceways must be secured at appropriate intervals. This requirement is essential to ensure the structural integrity and safety of the electrical installation. By securing the raceways at designated intervals, you prevent physical damage, ensure that the conduit remains in place, and reduce the risk of electrical hazards such as shorts or exposed wiring.

Properly secured raceways also adhere to the National Electrical Code (NEC) guidelines, which specify the necessary support and securing requirements for conduits and electrical boxes. This is vital in maintaining a safe and compliant electrical system.

When considering other statements, it's important to note that not all raceways need to be metal. Various materials, including non-metallic options, can be used depending on the application and environmental conditions. The notion that raceways can be installed without securing them is unsafe and does not comply with building codes, as unsecured raceways may sag or come loose over time due to environmental factors or physical impact. Lastly, while grounding may not be required for all raceways, proper grounding is necessary to ensure safety and compliance with electrical codes, especially for metal raceways. Therefore, the requirement to secure raceways is a fundamental aspect of safe and effective electrical installation.