This 120/240 volt "Interchangeable" 90 amp, double pole replacement circuit breaker is used in a Thomas & Betts load center and/or used for feeding Sub-Feed Panel Boxes. This is only a suggestion and cannot assure your compliance with all local codes. Please check local electrical codes before starting any electrical project.2 Pole, 90 AmpType UBITB for use in Thomas & Betts load centersRequires two 1-inch spaces