Quick Answer
Yes. Tell the supplier the required rating, the applicable standard or customer specification, and the test configuration before the quote is finalized. Also describe where the enclosure will be installed and what it must protect against. If the project has no defined rating, say so rather than letting a supplier guess.
Factory Scenario: “Outdoor Use” Is Not a Test Requirement
Consider an illustrative RFQ for a control box described only as “outdoor, weather resistant.” That phrase does not say whether the concern is rain, hose-down, dust, condensation, salt exposure, or a particular installation orientation. A quote based on a plain folded cabinet may look comparable to one that includes a gasketed door, cable glands and a validation plan, while the two offers cover different products.
The useful factory response is to pause and ask what the enclosure must withstand, how cables enter, whether the door is opened in service, and what evidence the buyer needs at release. This is a planning example, not a claim about a specific Nbfeiyu customer incident.
What an IP Rating Does and Does Not Tell You
An IP code addresses protection against access or ingress of solids and water under defined test conditions. It does not, by itself, confirm corrosion life, UV resistance, impact strength, thermal management, electrical safety, or suitability for every outdoor environment. Those may require separate requirements and evidence.
For a quotation, identify the target code and the standard or customer method that governs it. Confirm whether the finished assembly, including doors, seals, vents, cable entries and installed hardware, must meet the requirement. Testing a bare shell is not equivalent to testing a completed enclosure.
Inputs That Change the Design and Quote
- Installation: indoor or outdoor location, orientation, exposure and access for maintenance.
- Openings: cable glands, connectors, vents, windows, locks and mounting holes. Each opening can affect the sealing path.
- Joint details: door overlap, gasket type and location, fastener spacing, hinges and latch pressure.
- Materials and finish: define the metal or plastic, coating, corrosion environment and any masking areas. Finish alone does not establish an ingress rating.
- Evidence: say whether you need a design review, sample evaluation, formal test report, inspection records or third-party testing.
Factory View: Treat the Seal as an Assembly Feature
On a fabricated cabinet, the door, flange, gasket, corners, fasteners and cable-entry hardware work together. Dimensional variation, a coating build-up at a closing surface, a distorted panel or an inconsistent latch adjustment can change contact around the perimeter. The inspection plan should therefore identify the sealing interface and the assembled condition, not just the outside dimensions.
Nbfeiyu’s sheet-metal enclosure case describes drawing review, cutting, forming, welding, coating and fit checks. Its quality-control process explains that project inspection methods and records are agreed against the drawing and customer requirements.
For adjacent equipment use cases, compare the requirements on the electrical and telecom components page. If the drawing package is still being assembled, use the OEM/ODM RFQ checklist to confirm the information needed for a useful quote.
Buyer Checklist
- State the target IP code and the governing standard or customer specification.
- Identify the test object: shell, assembled enclosure, or enclosure with specified accessories.
- Show door orientation, gasket path, cable entries, vents and mounting conditions on the drawing.
- Define operating environment separately from the IP requirement, including corrosion, UV, temperature and cleaning exposure where relevant.
- Agree who arranges testing, the sample configuration, acceptance criteria and required report before production release.
- Keep the approved drawing revision and the validated configuration linked to the order.
FAQ
Can the supplier choose an IP rating for me?
The supplier can explain design implications, but the equipment maker or responsible engineering authority should set the requirement for the application.
Does powder coating make an enclosure waterproof?
No. Coating protects specified surfaces; ingress protection depends on the complete enclosure design and its tested configuration.
Can a prototype prove the production enclosure rating?
Only if the tested sample represents the approved materials, openings, seals, hardware and assembly method intended for production.
Conclusion
Put the ingress requirement in the RFQ early, then connect it to the actual assembled design and the evidence needed for approval. If the rating is not yet established, ask for a design review instead of accepting an assumed specification.
Need an Enclosure Design Review?
Send the drawing, target environment, openings, finish and required evidence..