i have a federal pacific QMQB?panel board with exisitng 60a 600v fuses. the new design/circuit requires the fuses to be 100a600v FRS-R. the existing fuses are cartridge and new fuses will have blade as you all know. i have never worked on this type of equipment so i dont know if any modifications can be done to turn a 60a to 100a fusible disconnect. Aany one ever had an experience like this??