The SXN1230 shall be housed in a magnetic shielding NEMA steel enclosure for interior installations. It shall operate from 230 volts AC and have a barrier strip accessible through knock-outs in the enclosure for hardwiring power input and output connections. Overall dimensions shall be 10.0" H x 8.0" W x 4.0" D. Weight shall be 4.5 Kg / 10.0 pounds. The SXN1230 shall have a load rating of 20 amps at 230 volts, a self-test circuit with visual indicator and provide EMI/RFI filtering. It shall meet Grade A, Class 1, Mode 1 guidelines for power line surge suppressors and withstand at least 1000 occurrences of surge pulse voltages up to 6000 volts. The SXN1230 shall be tested and certified to IEC/EN 61643-1.