It depends on the model # or series.
Also, lead times are typically longer during the 4th quarter.
Standard enclosures are approximately 2-4 weeks and sooner if at all possible. End of year, approximately 4-6 weeks.
Custom enclosures depend on the complexity.
The minimum is 6-8 weeks, 10-12 weeks, or 15-20 weeks depending on the time of year and the complexity. These times will be sooner if at all possible. They have to pass Factory Acceptance Testing.