So I have a research furnace I need to install with a single point connection, Per the vendor specs the equipment is rated at 118A. The vendor has a 200AF/175AT breaker at the connection point. I'm planning to install a disconnect with 150A fuses to supply the equipment, since at 125% the amperage is 147.5A. I would rather have my disconnect blow a fuse, than the vendor's breaker trip. This will also reduce the arc flash incident energy. So my obvious question is does anyone see an issue with this installation per the code or should I install 175A fuses? I haven't contacted the vendor yet, but plan to do so.