Siemens S2440L1125 is an electrical panel with a maximum short circuit current rating of 100,000 AMPS RMS symmetrical, 120/240V~. It is suitable for use as service equipment when a main breaker or Class J, T, R or L fuses are installed. When used as service equipment, unused neutral bar terminals may be used to terminate equipment grounding wires in the combinations indicated for Siemens breaker types. The panel is also suitable for use with copper or aluminum 60/75 C wire. The neutral/ground bars can accommodate 10-14 CU/10-12 AL wires using an EC2GB or EC3GB 8 AWG GND BAR KIT ACCESSORY.