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#108856 - 12/23/03 06:39 PM No-Blow Fuses  
Admin  Offline

Administrator
Member
Joined: Oct 2000
Posts: 3,457
NY, USA
[Linked Image]

[Linked Image]
Quote
Here are two pictures of a piece of equipment that came over from another one of our buildings. It's an air dryer for compressed air. As you can see, they didn't want to use fuses, so they came up with a more "practical" idea!!! We had the company photographer take these pictures so we could have this mess documented in case there were any problems with the equipment.
Unreal!!!

I, as well as my co-workers love your forums on code violations. It's unbelievable what some people will do.

-Joe Martell


2017 / 2014 NEC & Related Books and Study Guides

#108857 - 12/23/03 09:39 PM Re: No-Blow Fuses  
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
Those clips have to be stretched or squeezed...9/16-inch copper tubing doesn't exist.

But, there is a correct product for the job—Bussmann "NTN-R30" for 30A 250V swithces.




[This message has been edited by Bjarney (edited 12-23-2003).]


#108858 - 12/23/03 10:42 PM Re: No-Blow Fuses  
joemar4  Offline
Junior Member
Joined: Dec 2003
Posts: 2
Lake Ronkonkoma, NY USA
Let me make it clear that this is how the equiment came over from one of our other buildings and this is what we found when we came to do the electrical install. This is NOT how we left it. We wanted it documented that the equipment arrived like this, hence we had the company photographer take pictures.
We did the install and corrected any and all pre-existing violations, including changing the disconnect and installing the proper size fuses.
My point was how they could have run this equipment like this in our other building located in New Jersey.
Joe


#108859 - 12/23/03 11:17 PM Re: No-Blow Fuses  
electricman2  Offline
Member
Joined: Nov 2003
Posts: 269
Thomasville, NC USA
I see a red, blue, black and white wire entering the top of the disco, but what appears to be one white wire leaving the short piece of EMT. Am I missing something? [Linked Image]


John

#108860 - 12/23/03 11:38 PM Re: No-Blow Fuses  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,222
SI,New Zealand
electricman2,
That White wire wouldn't be a neutral would it?.
That terminal block at the bottom of the disconnect looks like it's segregated from the metal panel, would this be where the neutral joins with another wire that loops down to the receptacle below?. [Linked Image]


Let's face it, these days if you're not young, you're old - Red Green grin

#108861 - 12/24/03 04:07 AM Re: No-Blow Fuses  
Big Jim  Offline
Member
Joined: Jul 2003
Posts: 394
Denver, CO USA
It looks like kind of a sleazy setup overall but was a fused disconnect required where the equipment was previously installed?


#108862 - 12/24/03 12:13 PM Re: No-Blow Fuses  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
Quote
I see a red, blue, black and white wire entering the top of the disco, but what appears to be one white wire leaving the short piece of EMT. Am I missing something?


Looks to me as though the receptacle below the disco is tapped from the red phase and the main equipment is wired 208V delta with no neutral.


#108863 - 12/24/03 07:19 PM Re: No-Blow Fuses  
mvpmaintman  Offline
Member
Joined: Sep 2003
Posts: 123
Manhattan, Kansas, USA
I've seen this done alot out here in the land of OZ. Usually on a roof mounted air handler. Found out that it was a crew run by the guy who is now my boss. He used to do this so that they could keep the units running and find the short when the wire burned up.

BTW, I am looking for other employment.


#108864 - 12/26/03 08:54 AM Re: No-Blow Fuses  
electure  Offline


Member
Joined: Dec 2000
Posts: 4,261
Fullerton, CA USA
Per Paul
>The receptacle below the disco is tapped >from the red phase.
I'd agree, but what's the little box in between the disco and the recp?
Does that contain a 5 amp Edison base fuse for the recp?


#108865 - 12/26/03 04:20 PM Re: No-Blow Fuses  
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
The middle box looks like a Bussmann SOU listed at http://www.bussmann.com/library/bifs/1129.pdf


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