240.6 additional standard ampere ratings

[quickdad]

I received an email question regarding 240.6 Standard Ampere Ratings with the question, why is 601 amps listed as one of the additional standard ampere ratings?

Does anyone have a practical answer for this question?

Thanks.

 

[charlie]

Re: 240.6 additional standard ampere ratings

This is to permit a 600 (basically) ampere fuse to be used in the next size fuse holder without using an adapter.

 

[iwire]

Re: 240.6 additional standard ampere ratings

Fuses Rated 601-6000 amps are bolt mount like this.

 

[iwire]

Re: 240.6 additional standard ampere ratings

Originally posted by quickdad:
I received an email question regarding 240.6

Quickdad would that email have come from girlgenious?

As She asked the same question here

 

[quickdad]

Re: 240.6 additional standard ampere ratings

Thanks Charlie & Bob
This is some good info that I will share with those who asked the question. It was not Girlgenious- the questions came via. one of my previous students who works for a mine in WY

Have a good week-end!

 

[tom baker]

Re: 240.6 additional standard ampere ratings

Steve: Welcome to the forum. The 601 amp is a good question and I've wondered why myself.

 

[Ed MacLaren]

Re: 240.6 additional standard ampere ratings

I've always assumed that the "601" was meant to be interpreted as "anything over 600".

By the way, there are lots of "bolt-on" fuses that are less than 600 amp rating.

Ed