Correct configuration of metal fuse element in C2 fuses

[Jack J.]

[Jack J.]

[Gary B.]

[Jack J.]

Re: Correct configuration of metal fuse element in C2 fuses

[Jack J.]

[Jack J.]

Re: Correct configuration of metal fuse element in C2 fuses

Gary, a few more.

[Edward B.]

Re: Correct configuration of metal fuse element in C2 fuses

Those aren't fuses, this is a fuse, as once used on Fishers Island (NY):

[Gary B.]

[Terry M.]

Re: Correct configuration of metal fuse element in C2 fuses

Those aren't fuses, this is a fuse, as once used on Fishers Island (NY):

Those ARE real fuses Ed. I would guess 4Kv. I could tell you more than you want to know about those. Those glass fuses are filled with Carbon Tetrachloride (CCl4 for you chemists). Enough, I could go on for hours about those fuses and the company that made them - S & C Electric Company and the people who started it in the early 1900s. But all that would be way too far off topic.

[Mark F.]

Re: Correct configuration of metal fuse element in C2 fuses

Terry,

The label looks like it says "75/54? AMP." can't read what's next to the "4".

Do you know why there are two values for the amperage ?

[Gary B.]

Re: Correct configuration of metal fuse element in C2 fuses

Mark,

I believe the text on the label is 75/54C. Like some a British fuses, some fuse can sometimes have two ratings. The higher number is for a surge situation; the lower number is for what the fuse will handle continuously. So, the C after 54 could stand for continuous.

Gary

[Terry M.]

Re: Correct configuration of metal fuse element in C2 fuses

Terry,

The label looks like it says "75/54? AMP." can't read what's next to the "4".

Do you know why there are two values for the amperage ?

Mark
I would be guessing, but Gary;s suggesting does sound reasonable. The shape of the filament looks like a dual element, so two values are to be expected.

I'll ask around work, but most people familiar with these liquid-filled fuses are long gone. The S & C factory and offices are on the other side of town from me (about 30 miles through the densest traffic you can imagine) and next week is Tuscon. You have me curious in part because those current values are not what I am used to. I am used to numbers like 45, 50 and 60. Even numbers as we go higher, but as crude as those fuses were maybe a couple of amps was within spec. but then why list it?

[Edward B.]

Re: Correct configuration of metal fuse element in C2 fuses

Fuse now serves as a paperweight/conversation piece on my desk. For those who are interested, I'll take a close-up picture of the label and post it when I get back to the office if this enlargement is not sufficient. FYI, these fuses are no longer used on Fishers Island. This one was given to me at their waterworks perhaps 10 or 15 years ago when I admired its construction. It's heavy. EJB

[Gary B.]

[Gary B.]

Re: Correct configuration of metal fuse element in C2 fuses

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The fuse in the photo on the metal container lid says 20A on the metal cap, but perhaps a 4-amp version would appear similar at some viewing orientations. And probably a 4-amp fuse has a more delicate central section that might have shifted position during handling, resulting in the non-colinear shape of the element in the JG.

Gary