Can nonmetallic boxes be used with metal conduits?

Nonmetallic boxes can indeed be used with metal conduits as long as proper grounding and bonding methods are implemented. This ensures that the electrical system maintains safety and compliance with the National Electrical Code (NEC). The NEC allows for a combination of different materials in electrical installations as long as they are installed correctly and safely.

When using nonmetallic boxes, it is essential to consider that they do not provide an inherent grounding method like metal boxes do. Therefore, the use of proper grounding techniques—such as grounding conductors or bonding jumpers—is necessary to ensure that any fault current is effectively directed to ground. This mitigates the risks of electric shock or fire hazards.

In contrast, certain responses suggest either exclusivity between box types or outright prohibitions, which do not reflect the flexibility allowed by the NEC when appropriate safety measures are taken. It's important to follow the code's provisions regarding the installation of electrical components to maintain safety and compliance standards in all wiring systems.