The following statement regarding emergency switchboards is incorrect .

A、Emergencyswitchboardandmainswitchboardshallbeinstalledintheengineroom;
B、Emergencyswitchboardandmainswitchboardareusuallycomposedofemergencygeneratorcontrolpanelandemergencyswitchboard;
C、Theemergencyswitchboardisusedtocontrolandmonitortheemergencygeneratorset;
D、Noparallelpanelandreversepowerrelayarerequiredforemergencyswitchboard