Amazon: 30 amp fuse box IROCH Fuse Box Holder,DC 32V 100AMP Blade Fuse Box Holder with LED Warning Light Kit for Car Boat Marine Trike Dual Independent Positive and Negative Bus (12way with Negative Bus) Cutler-Hammer DPU222RP Non-Fusible A/C Disconnect Switch, Gray. 3.9 out of 5 stars 21. $10 $ 10. 49 $14 $ 14. 99. FREE Shipping. I don't know what I'm doing. I have a cutler-hammer Jul 02, 2009I don't know what I'm doing. I have a cutler-hammer circuit breaker on my air conditioning system that is not working. The model is DPU222R. I was able to open the box and unscrew the box, but I can't open it and I'm not sure what to do now to change the circuit breaker. Any advice?