Is there any way to determine how small you can get with fuse sizes in an existing bus plug, without having to resort to reducers? For instance, can an existing 200A. bus plug with 125A. fuses be replaced with 60A. fuses or does the plug itself need to be changed to a smaller size (i.e. 100A. plug to accommodate 60A. fuses)?
Bus Plug Fuse Sizes
- Thread starter Turk1957
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- Location
- New Jersey
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- Journeyman Electrician
The gap size is based on the size of the switch and the type of fuse and the fuses is typically sized to the gap. What's wrong with fuse adapters?
- Location
- Illinois
- Occupation
- retired electrician
I believe the physical size changes above each of these numbers: 30, 60, 100, 200, 400, 600.
You would need to adapt down two physical sizes to put a 60 amp fuse in a fuse holder that currently has a 125 amp fuse.
You would need to adapt down two physical sizes to put a 60 amp fuse in a fuse holder that currently has a 125 amp fuse.
DrSparks
The Everlasting Know-it-all!
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- Madison, WI, USA
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- Master Electrician and General Contractor
That's correct. I worked industrial for many years. Reporposed many discos. Kept a variety of fuse reducers on shelf.
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- San Francisco Bay Area, CA, USA
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- Electrical Engineer
In theory the fuse mfrs COULD do that, in reality they do not, because there is no compelling reason for them to make THREE VERSIONS of the same 60A fuse; one that fits a 60A disconnect, one that fits a 100A disconnect and one that fits a 200A disconnect. The cost to manufacture the 100A and 200A frame versions would never be amortized by enough sales to make them affordable, especially compared to just selling adaptors..
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