Nonmetallic conduit fittings are used in electrical installations to connect and secure nonmetallic conduits, such as PVC (polyvinyl chloride) or HDPE (high-density polyethylene) conduits. These fittings provide a means to transition, terminate, or join conduit sections, as well as to facilitate cable or wire entry into the conduit system. Here are some common types of nonmetallic conduit fittings:
Couplings: Couplings are used to join two sections of conduit together. They typically consist of two separate parts that are joined by sliding them onto the ends of the conduits and securing them with screws or other locking mechanisms. Couplings can be straight or tapered, depending on the conduit type and application.
Connectors: Connectors are used to join nonmetallic conduit to electrical boxes, enclosures, or other fittings. They come in various configurations, such as straight connectors, 90-degree connectors, or offset connectors. Connectors often have a female thread or a compression mechanism to secure the conduit in place.
Adapters: Adapters are used to create a transition between nonmetallic conduit and other types of conduit or fittings. They allow for connecting nonmetallic conduit to metallic conduit, such as rigid metal conduit (RMC) or intermediate metal conduit (IMC), or to threaded fittings.
Elbows: Elbows are used to change the direction of the conduit run. They come in different angles, such as 45 degrees or 90 degrees, to accommodate various installation requirements. Elbows may have a removable cover or a hinged design to allow easy access for pulling and routing wires.
Bushings: Bushings are used to protect wires or cables as they enter or exit the conduit system. They provide a smooth surface to prevent damage or abrasion to the cables. Bushings can be snap-in, threaded, or push-in types, depending on the application.
Caps and Plugs: Caps and plugs are used to seal the ends of nonmetallic conduit to prevent the ingress of moisture, dust, or debris. Caps are used on open ends, while plugs are used on threaded ends of the conduit.
Transition Fittings: Transition fittings are used to connect nonmetallic conduit to metallic conduit or other types of conduit systems. They provide a secure and reliable connection between different types of conduit materials, allowing for a smooth transition in the electrical installation.
These are just some examples of nonmetallic conduit fittings, and the availability may vary depending on the specific conduit type and local electrical codes. When selecting nonmetallic conduit fittings, it's important to ensure they are compatible with the conduit material, meet the required standards, and comply with applicable electrical regulations and installation requirements.