C.N.R Fuse?

[Peter Wigle]

This is just curiosity. I found this 15 amp fuse protecting a gas furnace. It is old (won't work with a 15 amp rejector ring) and of a type that I had not hear of before. Is CNR an type (former type) of fuse?

I can't find any current references and I expect that a time-delayed fuse would be suitable if this blows. But what is/was the difference?

[Jerry Peck]

Peter,

That is just a regular Edison base fuse, which is why the Safe-T Fuse adapter will not allow it to fit in.

C.N.R simply means it is Canadian National Standards - Recognized.

No, I did not know that ;) (however, I did suspect that the C.N. meant Canadian National, but only because you are in Canada - does that count?), I found it here in a Google search. :D

http://80.254.188.93/schurter/ams.nsf/407303c74462b8b1c12569600042c70c/22a430a5c3e11e23c1256c000045278a/$FILE/E41599Vol2Sec06.pdf

I would not install a time delay fuse in its place, I would just keep some 15 amp Edison base fuses handy (C.N.R. approved, of course ;) ).

[David Banks]

Peter. Hope this helps. CNR appears to stand for Canadian National Standards.
http://80.254.188.93/schurter/ams.nsf/407303c74462b8b1c12569600042c70c/22a430a5c3e11e23c1256c000045278a/$FILE/E41599Vol2Sec06.pdf
http://80.254.188.93/schurter/ams.nsf/407303c74462b8b1c12569600042c70c/22a430a5c3e11e23c1256c000045278a/$FILE/E41599Vol2Sec06.pdf
Can not get it tio work. Anyway same site as Jerry posted.

[Ted Menelly]

Canada, where is Canada. Oh yeah, that's the country we let the French an British fight over:)

[Peter Wigle]

I guess you're right on the CNR although I have never seen it (only CSA on anything electrical I've seen). But it is an old fuse so perhaps its from the day.

Jerry, I think we might be talking about two different types of fuse rejecting systems. Are you referring to S-type fuses? From what I understand, those aren't used here. I was referring to what I think would be correctly called Edison fuses. The 'nubs' vary in diameter based on amperage, but they are different from S-types. You can install plastic rejector rings in a standard fuse panel to prevent overfusing.

(Ted, its not so bad having people fight *over* you. Of course, there was that one time the country actually was attacked. But it turned out that particular Destiny wasn't Manifest after all :p ).

[Jerry Peck]

Peter,

The photo you posted shows the Edison base fuse as the "Old 15 amp - Wide 'nub'"

The others in the photo - I've never seen those before. Thanks for the photo.