Are liquidtight conduit fittings required to be listed?

Liquidtight conduit fittings are indeed required to be listed to ensure a high level of safety and reliability in electrical installations. When a fitting is "listed," it means it has been evaluated by a recognized testing laboratory and meets specific performance standards, ensuring that it can adequately protect against moisture and other environmental factors.

The requirement for liquidtight conduit fittings to be listed is critical because these fittings are often used in environments where they will be exposed to liquids or where the potential for moisture ingress exists. By ensuring that these fittings are listed, it helps maintain compliance with safety codes and standards, which ultimately protects both the installation and its users from hazards such as electrical shorts or failures due to moisture exposure.

The option that suggests liquidtight conduit fittings do not have to be listed ignores the fundamental safety considerations involved in their use, particularly in wet or damp locations where improper materials can lead to serious consequences. Additionally, focusing only on certain types of materials or specific conditions does not align with the overarching safety principles that necessitate the listing requirement for all liquidtight conduit fittings.