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No-Blow Fuses #108856 12/23/03 05:39 PM
Joined: Oct 2000
Posts: 3,632
Admin Offline OP
[Linked Image]

[Linked Image]
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.

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
Re: No-Blow Fuses #108857 12/23/03 08:39 PM
Joined: Apr 2002
Posts: 2,527
Bjarney Offline
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).]

Re: No-Blow Fuses #108858 12/23/03 09:42 PM
Joined: Dec 2003
Posts: 2
joemar4 Offline
Junior Member
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.

Re: No-Blow Fuses #108859 12/23/03 10:17 PM
Joined: Nov 2003
Posts: 269
electricman2 Offline
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]

Re: No-Blow Fuses #108860 12/23/03 10:38 PM
Joined: Jul 2002
Posts: 8,354
Trumpy Online Happy
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]

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

Re: No-Blow Fuses #108862 12/24/03 11:13 AM
Joined: Aug 2001
Posts: 7,520
pauluk Offline
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.

Re: No-Blow Fuses #108863 12/24/03 06:19 PM
Joined: Sep 2003
Posts: 123
mvpmaintman Offline
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.

Re: No-Blow Fuses #108864 12/26/03 07:54 AM
Joined: Dec 2000
Posts: 4,286
electure Offline
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?

Re: No-Blow Fuses #108865 12/26/03 03:20 PM
Joined: Apr 2002
Posts: 2,527
Bjarney Offline
The middle box looks like a Bussmann SOU listed at

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