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Author Topic: What are these rated for?  (Read 2266 times)

Jamin Lynch

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What are these rated for?
« on: February 13, 2015, 07:12:23 pm »

No words can express this.
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Lance Rectanus

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Re: What are these rated for?
« Reply #1 on: February 13, 2015, 08:53:51 pm »

I worked at a company where all 3 rooftop air handlers had this done to them. The cutoff switches were still operative and the units had been changed to 3 phase breakers in panels located inside the building.
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John Roberts {JR}

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Re: What are these rated for?
« Reply #2 on: February 13, 2015, 09:39:00 pm »

Back in the '70s when my fledgling business was just starting out I took on a repair job that reminds me of. A custom piece of production equipment had the internal fuse replaced with a piece of solid aluminum 1/4" round stock cut to length. The inside of the fixture was pretty much turned to charcoal.

I fixed it and probably charged him a little too much to fix it, but in hindsight it was a dumb-ass tax.

JR 
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Stephen Swaffer

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Re: What are these rated for?
« Reply #3 on: February 13, 2015, 10:38:43 pm »

No words can express this.

I could envision a situation where the fuse "blanks" could be kosher.  The disconnect within sight of equipment is mandatory-but if there is properly sized OC  upstream, then there is no need for OCP at this location-fuses and disconnects are expensive.

The ground wire going to an isolated neutral bar without a bonding screw?  Maybe there is a screw there?  In which case we still have an issue as the concentric KOs on the incoming conduit are not a compliant ground. In any case the grounding is a different story!  An outdoor unit (condenser?) overheating or melting down would be an annoyance-energizing the same with no ground to activate OCP is dangerous to the tech.
« Last Edit: February 13, 2015, 10:41:09 pm by Stephen Swaffer »
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Mike Sokol

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Re: What are these rated for?
« Reply #4 on: February 14, 2015, 07:21:59 am »

No words can express this.

There's a lot of mud/dirt in the bottom of this box. Shouldn't that be a weather-tight enclosure? Not only are over-current fails dangerous, but corrosion can create high resistance connections which can lead to fires.
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Jerome Malsack

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Re: What are these rated for?
« Reply #5 on: February 14, 2015, 08:16:56 pm »

I think I see the feed from the top with three connections and what looks like a ground out the bottom left and nothing coming in for that ground.  So is the conduit the ground feed to the metal body ??
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Ivan Beaver

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Re: What are these rated for?
« Reply #6 on: February 15, 2015, 09:38:46 am »

Those are still "fuses".  They will break/open with to much current-----------------

Now whether the wire will melt first or not is the question.

No I do not recommend this.
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Jonathan Johnson

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Re: What are these rated for?
« Reply #7 on: February 15, 2015, 11:11:17 pm »

I could envision a situation where the fuse "blanks" could be kosher.
Except... not listed for the purpose.
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ProSoundWeb Community

Re: What are these rated for?
« Reply #7 on: February 15, 2015, 11:11:17 pm »


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