The Square D by Schneider Electric QO Outdoor Circuit Breaker Enclosure is compatible with Square D QO 2-pole circuit breakers 100-225 amps and is suitable for use as service entrance equipment for compliance up to 2017 NEC code. This breaker box is rated Type-3R for outdoor use. This enclosure accepts a B-Hub for top feed applications (Circuit Breakers and B-Hubs sold separately). For non-service entrance equipment applications, ground bar PKOGTA-2 may be needed and is sold separately.