Sep 30, 2004 · NOTE: If the MCC is “unimportant (i.e., Ip = 1.0 per ASCE 7)” and being installed as part of a new- or existing-building project in which the seismic design of the building is based on SDC C, then the MCC is seismically exempt (per ASCE 7 para. 13.1.4) and compliance with the Std. Detail isn’t required.