Square D doesn't allow it and show me where fuse reducers are rated for use as service equipment?
In addition to what JB said:
1. I did find this on the web from Sq D /Schneider:
Does SquareD by Schneider Electric offer fuse reducers for use with fusible General Duty, Heavy Duty or Double Throw safety switches?
Issue:
Selection
Product Line:
Safety Switches
Environment:
General Duty Type D, Heavy Duty Type H, Double Throw Type DT
Cause:
Reduce ampere size
Resolution:
No. Fuse reducers are available from fuse manufacturers. Square D (by Schneider Electric) cannot recommend their use as their performance in our fusible safety switches has not been evaluated by UL.
But, I am calling BS on that. Bussman fuse reducers are UL listed, so Sq D is being disingenuous uppity scumbags and implying something is required that is not. Its not our fault Sq D never made fuse reducers but Eaton (they own Bussman) does - go sulk in a corner SQ D and cut the nonsense. Yet another example of Sq D thinking there stuff is made of gold and apparently "too good" for fuse reducers. I hate that company.
2. Generally the code tells us what we CANNOT do, not what we CAN do There is a new code, 240.60(E) that requires fuse reducers to be listed, but I am not aware of any special testing or attribute for fuse reducers used on service conductors.