A UL 514B rigid 90° connector is a conduit fitting designed to join a compatible conduit run to an enclosure or other electrical entry point while changing the direction of the connection by 90°. Buyers should confirm the fitting’s conduit type, trade size, material, installation method, and applicable certification or listing before ordering. “UL 514B” refers to a standard covering conduit, tubing, and cable fittings; it does not, by itself, confirm that every product described as a 90° connector is UL Listed. In this guide, we explain the specifications to check, how to match a fitting to an application, and what information to request from a supplier.
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This guide is intended for electrical product distributors, contractors, project buyers, and specification writers sourcing rigid conduit fittings. It is also useful when comparing an aluminum connector with a steel or iron alternative, or when checking whether a proposed fitting suits an enclosure entry. Final selection should follow the applicable electrical code, project specification, and manufacturer’s instructions. Where requirements are unclear, consult the project engineer or the authority responsible for approval.
A rigid 90° connector is a fitting that forms a right-angle connection between a conduit and an enclosure, cabinet, box, or other compatible electrical opening. Its purpose is to support the conduit connection and provide a change in direction at the termination point. Depending on the design, the connector may use threads, a locknut, a threaded hub, or another specified attachment method. The exact construction and permitted use vary by product, so buyers should check the product drawing and installation instructions.
UL 514B is a product safety standard for conduit, tubing, and cable fittings. A standard identifies requirements and evaluation criteria, but buyers still need to verify the status and scope of the individual product they intend to use. Check the model number, manufacturer identification, certification or listing mark where applicable, and supporting documentation. If a project requires a UL Listed fitting, ask the supplier to confirm that the exact model and size are covered by the relevant listing.
Rigid 90° connectors may be offered in materials such as aluminum, steel, or malleable iron. Aluminum can be considered where lower component weight or material selection is important, while steel and iron options may be specified for other mechanical or project requirements. No material is automatically suitable for every environment. Confirm the finish, corrosion considerations, installation location, and compatibility with adjacent conduit and equipment.
| Specification | What to confirm | Why it matters |
|---|---|---|
| Conduit type | Whether the fitting is intended for RMC, IMC, or another specified system | Connection dimensions and permitted use can differ between systems. |
| Trade size | The nominal size required by the design, such as 1/2 in or 1 in | Trade size is a nominal designation, not a direct measurement of every fitting dimension. |
| Angle and configuration | 90° body geometry, entry direction, and available clearance | Confirms that the fitting suits the route and enclosure layout. |
| Connection method | Thread type, hub arrangement, locknut, and any required sealing components | Ensures the connector can be installed with the intended conduit and enclosure. |
| Material and finish | Body alloy or metal, surface finish, and environmental suitability | Supports project requirements for weight, corrosion exposure, and compatibility. |
| Compliance documentation | Applicable standard, certification or listing status, and model coverage | Helps avoid substituting a product that does not meet the project specification. |
The 90° description identifies the nominal direction change, but it does not specify the connector’s overall length, radius, entry dimensions, or clearance envelope. Those details should come from the manufacturer’s drawing for the exact model and size. A fitting that appears similar in a catalogue image may have different thread details or installation requirements. For layout-sensitive work, compare the drawing with the enclosure opening and adjacent equipment before release.
Start with the conduit type stated in the plans or bill of materials. Do not assume that a connector intended for one rigid conduit system is interchangeable with a fitting for another system, even if the trade sizes appear similar. Confirm the manufacturer’s compatibility statement and any applicable installation limits. If the project uses mixed conduit types, have the responsible designer review the transition point.
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Match the connector’s trade size to the conduit and verify the enclosure opening, thread, and attachment method. Allow for the physical envelope of the fitting and the space needed for installation tools. This matters where equipment doors, adjacent conduit, or internal components limit access. Use the product drawing rather than estimating dimensions from the nominal size.
Choose the body material and finish against the project environment and specification. Consider exposure to moisture, chemicals, outdoor conditions, vibration, or other factors identified by the project designer. The connector’s material should also be suitable for the connected conduit and enclosure assembly. Where the environment is demanding, request written product guidance instead of relying on a general material description.
Before purchasing, confirm the exact model’s certification or listing status if one is required, as well as the applicable standard and installation instructions. Verify whether a locknut, gasket, seal, or other accessory is included or must be ordered separately. Follow the specified installation method and any stated tightening requirements. Do not infer weatherproof, watertight, or hazardous-location suitability unless the product documentation expressly supports that use.
Pricing for a rigid 90° connector can depend on the material, trade size, finish, order quantity, packaging, and requested documentation. Minimum order quantities and lead times are supplier- and product-specific, so they should be confirmed for the exact model rather than assumed from a general catalogue. For project procurement, provide the target quantity, delivery destination, required date, and any packaging or labeling needs when requesting a quotation. If certification documentation is required, include that requirement at the quotation stage.
Clear documentation is especially valuable when a buyer is considering a substitution or purchasing across multiple sizes. Ask for the model number to appear consistently on the quotation, drawing, packaging information, and compliance documents. This makes it easier to review the offer and reduce ambiguity during receiving and installation. If a supplier cannot confirm a critical requirement, pause approval until the project team can evaluate the gap.
A frequent mistake is treating “UL 514B” in a product title as sufficient evidence that the exact connector is UL Listed. Another is selecting by trade size alone without checking conduit compatibility, connection style, and dimensions. Buyers may also overlook the installation space needed for a 90° fitting or assume that a given material is suitable for every outdoor or corrosive environment. Prevent these issues by reviewing the exact model documentation against the project specification before placing an order.
To select a UL 514B rigid 90° connector, first confirm the conduit system and trade size, then verify the connection method, 90° configuration, material, dimensions, installation requirements, and any required certification or listing for the specific model. The standard reference is not a substitute for product-level documentation. Before approval, compare the manufacturer’s drawing and compliance information with the project requirements. SIOSAN supplies aluminum conduit and fitting products; send our team your required conduit type, size, quantity, destination, and documentation needs to request product details and a project quotation.
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