I have a 125VDC Panel (225A Main, 10 KAIC) being fed from a 125 VDC Battery Bank (60 cell, 280 Amp Hour). The Battery Bank is in a room adjacent to the Panel it is feeding. Conductor size is 2 - #4/0 conductor. Per NEC code article 480.5, I am required to have a fused disconnect switch readily accessible at the battery bank. I need to size the disconnect switch and fuse for the battery bank. I plan to use a cutler hammer Type DH Heavy duty safety switch (industrial application), 250 V DC, Fuse class H with 200 A fuse, 2 pole in a Nema 1 enclosure. Ampacity of the #4/0 cable is 230A at 75 deg C. Will the 200A fuse work for this application? The next standard size fuse is 400A but that won't protect the conductos. Any suggestions and comments are welcome. Thanks!!!