Gulfstream V / G500 / G550
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 6
Training / Qualification; Confusion; Situational Awareness
ATC Issue All Types; Conflict Airborne Conflict; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Human Factors; Procedure
Aircraft X was cleared for takeoff from runway 15L.  Less than 2 minutes later Aircraft Y was cleared for takeoff from runway 15L.  Under the new wake Re-Categorization (RECAT) rules I need 4 miles radar separation and I didn't have it.  I also believe under the new wake RECAT rules I may have needed 2 minutes between the two departures. This report may be shared.I need to continue reviewing the new wake RECAT rules to prevent the re-occurrence of this event.  I also feel a large factor to why this error happened was the lack of training we received on the new wake RECAT.  We had no simulator time; and the instructor rushed through and skipped a lot of the informational slides.
An IAH Controller departs an aircraft and then less than 2 minutes later departs another aircraft. The Controller didn't have the required separation between the two aircraft due to the lack of knowledge of the re-classification of wake turbulence rules.