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Author Topic: No fuses? No problem!  (Read 3040 times)

Nathan Riddle

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Re: No fuses? No problem!
« Reply #10 on: April 01, 2018, 11:47:37 am »

I suspect (and I have no way to prove this), but I'd bet whoever was there "needed" it to supply power and wanted something akin to a "fuse" and used the copper wire.

The bolts sound scary...

Based on Preece  and Onderdonk.
https://www.powerstream.com/wire-fusing-currents.htm

This is schweet :) thanks!
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Ivan Beaver

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Re: No fuses? No problem!
« Reply #11 on: April 01, 2018, 02:38:21 pm »

You might be surprised by how much current that takes... About a year ago I needed to DIY a small fuse to get an amp working until replacement fuses arrived. I macgyvered a single stand of the smallest wire I could find (30ga?) tacked across the blown fuse, but decided to look up it's fuse current and that was close to 10A IIRC.  :o

 (BTW kids don't do this at home).

JR
Been there, done that, more times than I will admit.  But in controlled situations, NOT for a customer to take with them.

But NOT recommended.
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Mike Sokol

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Re: No fuses? No problem!
« Reply #12 on: April 01, 2018, 02:50:01 pm »

Based on Preece  and Onderdonk.
https://www.powerstream.com/wire-fusing-currents.htm

That's great, but I don't see the fusing currents for a 1/4" nutdriver.  ;D
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Ron Hebbard

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Re: No fuses? No problem!
« Reply #13 on: April 01, 2018, 03:13:52 pm »

That's great, but I don't see the fusing currents for a 1/4" nutdriver.  ;D
  Hollow shaft or solid? 
Toodleoo!
Ron Hebbard.
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Mike Sokol

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Re: No fuses? No problem!
« Reply #14 on: April 01, 2018, 03:45:16 pm »

Based on Preece  and Onderdonk.
https://www.powerstream.com/wire-fusing-currents.htm

Can I print this out to show the AHJ why he should ignore my solid wire jumpers in place of fuses?
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John Roberts {JR}

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Re: No fuses? No problem!
« Reply #15 on: April 01, 2018, 03:58:43 pm »

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Tim McCulloch

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Re: No fuses? No problem!
« Reply #16 on: April 01, 2018, 05:11:14 pm »

Can I print this out to show the AHJ why he should ignore my solid wire jumpers in place of fuses?

How about an inline "wire/fuse" holder that is protected by an appropriate (for wiring size/terminals/etc) OCPD?  You could demonstrate how much current flows through (and with an infrared camera, show the heat) a conductor about to "fuse".
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Mike Sokol

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Re: No fuses? No problem!
« Reply #17 on: April 01, 2018, 05:22:52 pm »

How about an inline "wire/fuse" holder that is protected by an appropriate (for wiring size/terminals/etc) OCPD?  You could demonstrate how much current flows through (and with an infrared camera, show the heat) a conductor about to "fuse".

Back in the day we called this a "smoke test".
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Mike Sokol
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Tim McCulloch

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Re: No fuses? No problem!
« Reply #18 on: April 01, 2018, 05:47:50 pm »

Back in the day we called this a "smoke test".

Smoking is on the downswing, Mike. ;)

Controlled destruction for instruction!
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"Practicing an art, no matter how well or badly, is a way to make your soul grow, for heaven's sake. Sing in the shower. Dance to the radio. Tell stories. Write a poem to a friend, even a lousy poem. Do it as well as you possible can. You will get an enormous reward. You will have created something."  - Kurt Vonnegut

John Roberts {JR}

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Re: No fuses? No problem!
« Reply #19 on: April 01, 2018, 08:22:01 pm »

Releasing smoke is a way to keep students awake...

JR
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