Auxiliary Gutters

Auxiliary gutters are a type of electrical raceway that is used to supplement the main electrical raceway system in buildings. They are typically installed in areas where it is difficult or impractical to run additional conduits or cables through walls or ceilings.

NEC Definitions

The NEC (National Electrical Code) defines auxiliary gutters as: "A supplementary enclosed runway containing conductors and forming a part of the service-entrance conductors, branch circuits, feeder, or motor circuits." (NEC Article 362.2) "Designed to supplement the raceway system by providing additional space for conductors." (NEC Article 362.2)Identification

Auxiliary gutters are typically fabricated from sheet metal or other non-combustible material. They may be round, square, or rectangular in shape and are typically larger than standard conduits.

Use

Auxiliary gutters are often used in the following applications: To provide additional space for conductors in high-density wiring areas To bypass obstacles or obstructions in walls or ceilings To connect electrical equipment that is not located near the main raceway system To provide a flexible and expandable wiring systemDistinction from Other Raceways

Auxiliary gutters differ from other electrical raceways, such as conduits and cable trays, in the following ways: They are not intended to be used as a primary raceway system. They are typically installed exposed, rather than concealed in walls or ceilings.* They provide less protection for conductors compared to rigid conduits.

Conclusion

The gutters shown in the image you provided are most likely auxiliary gutters, as they meet the NEC definition and are typically used in the applications described above. Flag for review