I think 440.22 doesn't mention fuses. Do you mean since 440.22 requires short circuit and ground fault protection for compressor motor. And 110.3(B) required you to install according to the instructions included in the listing and labeling. If the name plate or the instruction manual only list the fuse but no other protection devices, you have to have fuses some where in the circuit. Is this your logic?
In my opinion, they should have that note on the nameplate also.
To this day, more than anything else, I see walk in freezer and refrigerator condenser units marked "Fuse" with no options. Not sure why but they seem to be the slowest to adapt.
If I would be inspecting, I am not going to look for the specs. If the nameplate says fuse, or MFS, I will be requiring a fuse as the OCPD for the equipment.
I think that it's just stupid people who are writing the material for the labels.
I think that it's just stupid people who are writing the material for the labels.
Exactly or when they require something that is completely unnecessary and far exceeds or is not even required by the NEC. Portable generators comes to mind. Mike Holt had complained about this stuff for years.
Worst I see is hot tubs requiring a #6 EGC when the code says #10. I never comply with that!
That was my point that the people writing this stuff are clueless and can easily call the OCPD a fuse instead of what they really intended it to be either a fuse or a circuit breaker. Since the nameplate does say fuse I would contact the manufacturer to see if that is what is actually required.
My understanding is, as difficult as it is to believe, it has to do with $$$
It cost more to have the listing agency test for both fuse and breaker than simply for fuse.
