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What good is an 601a. fuse?
Meant to 601a in the Subject line :0
[This message has been edited by George Little (edited 12-05-2005).]
George Little
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A question I have asked myself more than once.
I hope an answer is presented.
Bob Badger Construction & Maintenance Electrician Massachusetts
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The only other reference I see is in 430.52ex2(d) and the necessity of 601a doesn't really make sense.
Greg Fretwell
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Are they really saying I could use a 601a time delay Type L fuse at up to 300% of FLA vs 175% for 600a or less? (when the rest of 430.52 Ex1 & Ex2 is met)
I don't know and I have never seen a 125 HP motor
Greg Fretwell
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AFAIK, the 601A fuse is used when you want to fuse an 800A disconnect at 600A.
Essentially, a 600A fuse in the 800A package.
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We have an IAEI Seminar 12/8 & 9 and the Bussman rep is scheduled to be there. I'll bounce it off him and bring back the info.
George Little
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I have been told that the after 600 amps, the physical size of fuses changes. If you have equipment that willonly accept fuses greater tahn 600 amps, but you want 600 amp protection, you use a 601 amp fuse.
Ryan Jackson, Salt Lake City
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Ryan that makes sense but why do we not have 101, 201, 401, 801 amp fuses as well for the same reason?
Bob Badger Construction & Maintenance Electrician Massachusetts
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because they make adapters for the smaller sizes?
Earl
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Ryan Jackson, Salt Lake City
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Tom
Shinnston, WV USA
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