The M-frame, P-frame and NS630b–NS1250 circuit breakers have mechanical lugs standard on both ends of the unit-mounted circuit breakers. The M-frame and P-frame I-Line™ circuit breakers have mechanical lugs standard on the O/OFF end only. These lugs are suitable for use with copper or aluminum wire. Rear connectors, compression lugs and distribution lugs are available for special applications. These lugs are certified to UL, IEC & CSA Standards. The PowerPacT Advantage. Proven Performance, Industry-leading circuit breaker innovation and protection for heavy-duty commercial and industrial applications. Smart, Integrated metering options provide a cost-effective solution to reduce energy consumption, optimize energy costs, and improve energy availability for your facilities. Flexible, Full range of thermal-magnetic and electronic trip molded case circuit breakers from 15 A to 3000 A, delivering the ratings, configurations, and operators for your unique applications. Simple, Common catalog numbers, standardized ratings, and a full range of field-installable accessories make product selection, installation and maintenance easier than ever. Common Design Features, Mounting holes, door trim, and handle accessories.