Conduits that pass unbroken through a Class I location?

In a Class I hazardous location, conduits that pass unbroken through the area are not required to have a seal. This is based on the National Electrical Code (NEC) requirements, which allow for the installation of conduits without sealing when they do not contain any electrical connections or devices within the hazardous area. Since Class I locations are typically associated with the presence of flammable gases or vapors, the focus is on preventing those substances from igniting due to electrical equipment.

If the conduit is unbroken and does not contain any sources of ignition, it presents a lower risk by keeping the hazardous gases contained within the conduit and away from the areas containing electrical devices. Therefore, there is no need for a seal to be installed in this scenario as it does not contribute to the safety of the installation.

Other options would incorporate specific conditions for sealing that do not apply when the conduit is unbroken or does not contain any potential ignition sources. These additional sealing requirements focus on minimizing risks in areas where electrical equipment is actually located or where hazardous materials are more directly interfacing with electrical connections.