Earthquakes are one of the deadliest forces of nature that can shake structures to their limits. No comprehensive study has been done in Pakistan on seismic performance of electric supply substations and requires immediate attention as Pakistan is one of the highly seismic area in the world with potential of large earthquakes. Electrical and Seismic design of electric supply substation, Seismic qualification of electric supply substation equipment by time history shake-table testing is discussed in this book. All tests performed on Electrical equipment (132 kilo Volt surge arrester) are according to Pakistan Electrical and Telecom Safety Code (PETSAC-2014) and IEEE Recommended Practice for Seismic Design of Substations (IEEE Std. 693-2005).