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Re: diazed fuses [Re: Texas_Ranger] #219167
02/23/18 07:18 PM
02/23/18 07:18 PM
S
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,371
Originally Posted by Texas_Ranger
Is this what we've been talking about?

https://www.youtube.com/watch?v=3ugxq0FMjoQ



I'm left with the impression Russia can be rather boring.....?



~S~

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Re: diazed fuses [Re: annemarie1] #219171
02/24/18 09:05 PM
02/24/18 09:05 PM
A
annemarie1  Offline OP
Member
Joined: Mar 2015
Posts: 75
england
I'm left thinking Russian electrics are a bit scary!!

Re: diazed fuses [Re: annemarie1] #219177
02/27/18 01:31 PM
02/27/18 01:31 PM
T
Texas_Ranger  Offline
Member
Joined: Dec 2001
Posts: 2,430
Vienna, Austria
Well if you deliberately overload them and possibly even bypass fuses any electrics get scary. Mix in some seriously dodgy DIY wiring and you'll end up with an explosive mix in just about any country. I've seen some seriously ancient and questionnable wiring in Northern Ireland, not so much in England yet, at least not in person. If you have a look over at DIYnot forums (electrics UK) you'll find a few hot messes rather quickly.

I'm not all that familiar with Russia but the house in the video definitely feels like extreme rural poverty to me and a setting like that usually breeds the worst wiring (and other building details). They do mention that there are no neighbours so I guess this is pretty remote.

Re: diazed fuses [Re: annemarie1] #219178
02/28/18 01:55 PM
02/28/18 01:55 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 7,036
Brick, NJ USA
I just checked out the video via the above link. All I can say is "MAD". Didn't see any science.


John
Re: diazed fuses [Re: annemarie1] #219179
02/28/18 01:59 PM
02/28/18 01:59 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 7,036
Brick, NJ USA
BTW, over on this side of the pond, I occasionally come upon the 1/2" or 3/4" copper pipe in fused disconnects for HVAC units. I posted a few pics over the years here.


John
Re: diazed fuses [Re: annemarie1] #219183
03/01/18 07:00 PM
03/01/18 07:00 PM
T
Texas_Ranger  Offline
Member
Joined: Dec 2001
Posts: 2,430
Vienna, Austria
Typical ways of bypassing Diazed fuses are wire (individual strands) wrapped around the ceramic body or a nail driven through the metal end caps and ceramic body. The worst kind is usually found in metal shops with a lathe, a solid metal bottle "fuse".

I've been guilty of "repairing" a 20 amp fuse myself, although I knew it only fed a single motor with additional protection of a 25 amp MCB upstream. The MCB was the actual protection for the old motor, the fuse was only necessary to avoid changing the historic wiring (ca.-1920) for a quick test run. Doing that I discovered that a single strand from a 1,5 mm2 conductor probably takes around 16 amps, maybe a bit less - it blew within less than a minute. A second strand fixed that issue. The next time we ran the motor we fitted a proper fuse of course.

Re: diazed fuses [Re: annemarie1] #219383
05/31/18 12:47 PM
05/31/18 12:47 PM
E
emolatur  Offline
Member
Joined: Dec 2009
Posts: 15
Maine
I suspect perhaps this is the video we're looking for?

https://www.youtube.com/watch?v=T20ieVDAtrg

Re: diazed fuses [Re: emolatur] #219384
05/31/18 03:37 PM
05/31/18 03:37 PM
A
annemarie1  Offline OP
Member
Joined: Mar 2015
Posts: 75
england
Yes thats it thats the video I was on about

Re: diazed fuses [Re: annemarie1] #219402
06/11/18 07:31 AM
06/11/18 07:31 AM
T
Texas_Ranger  Offline
Member
Joined: Dec 2001
Posts: 2,430
Vienna, Austria
Aaah, I think I know what's going on! Looks like a very bad overload, close to a short, and the fuse glows for a brief period of time before it blows (it does, right at the end of the video). The resistive wire is probably the load, not what's inside the fuse!
I've been told that these fuses can change as they age and should be replaced every 15 years or something - maybe that's why this one actually starts to glow before it blows?

BTW, the language is Czech. Not that understanding Czech would help much, they don't really talk a lot.

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