Function and interfaces
A junction box must accommodate its components and installation hardware as a complete enclosure. Supply the cable-entry type, gland or connector information, lid arrangement, mounting orientation and required ingress classification. A metal body alone does not establish an electrical enclosure rating.
Casting and machining review
Review lid and body datums, gasket compression, entry machining and fastener access. Identify electrical grounding points and masking where coatings would interfere. Clean drilled and tapped entries before assembly. Qualification should use the final connectors, gasket and fastening condition, with evidence appropriate to the specified enclosure requirement.
Requirements to define
| Interface | Review requirement |
|---|---|
| Cable entries | Thread or hole, connector and wall support |
| Lid seal | Gasket geometry and fastening condition |
| Grounding | Contact zone and coating boundary |
| Installation | Mounting orientation and completed-enclosure tests |
Example of a project decision
A new cable entry changes the pressure boundary and possibly the enclosure test configuration. Review the finished entry and connector rather than approving only the raw box.
Information for a quotation
Send the controlled 3D model and drawing, material specification, finish, order quantities and delivery needs. Include mating parts, critical characteristics and required test records. The quotation should identify the casting, machining, finishing and inspection scope, together with any open decisions. Request a drawing review.