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Old 02-14-2018, 12:57 PM   #1
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Default Fuse holder in 1/2" KO?

I've never seen these before, what are they for? I couldn't open the panel because there was a pallet in front of it and I was in a rush so I just snapped the picture.

Fuse holder in 1/2" KO?-img_0728.jpg
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Old 02-14-2018, 01:12 PM   #2
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I would guess there for that meter or surge protector below the fuses. They probably tap off something large to feed that thing below
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Old 02-14-2018, 01:15 PM   #3
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I would guess there for that meter or surge protector below the fuses. They probably tap off something large to feed that thing below
Good guess. I search for it and found those same fuses in one of the packages.

I didn't think about that because I never wired an E-Mon D-Mon with fuses.
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Old 02-14-2018, 01:17 PM   #4
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We just did a job that had 208v singe phase condensate pumps that were taped off the three phase feed to the CAC unit hanging in the ceiling. There was a place in the unit to land the condensate pump. It had two of those fuse holders in the unit.
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Old 02-14-2018, 01:19 PM   #5
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I've seen those in standalone equipment, but never in a panel like that.

I thought maybe it was a way to add an extra circuit or two to a full panel
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Old 02-14-2018, 01:24 PM   #6
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Is that a single phase panel? Or are they just metering a single phase load?

Never mind, you said you didn't open the panel.
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Old 02-14-2018, 01:27 PM   #7
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Those look like panel mount fuse holders, putting them in a 1/2" KO probably would not be 100% kosher but I could see it working reasonably well.
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Old 02-14-2018, 01:30 PM   #8
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Oh well, lunch is over. I'm going to mis the lunch view here now the job is done. Ok it's not as nice as McMikes!
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Old 02-14-2018, 01:32 PM   #9
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Hey, if you zoom in enough you can see my truck!
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Old 02-14-2018, 01:41 PM   #10
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Oh well, lunch is over. I'm going to mis the lunch view here now the job is done. Ok it's not as nice as McMikes!
Is that Asbury Park there along the ocean?
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Old 02-14-2018, 02:01 PM   #11
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CC fuse for motor protection?
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Old 02-14-2018, 02:12 PM   #12
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CC fuse for motor protection?
See: http://www.electriciantalk.com/f2/fu...5/#post4767833
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Old 02-14-2018, 02:15 PM   #13
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What's an Emon Dmon?
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Old 02-14-2018, 02:16 PM   #14
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Maybe they're for CT leads going to the submetering device. .
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Old 02-14-2018, 02:17 PM   #15
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What's an Emon Dmon?
http://www.emon.com/
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Old 02-14-2018, 02:37 PM   #16
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Quote:
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What's an Emon Dmon?
It's a sub-meter.
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Old 02-14-2018, 04:24 PM   #17
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Is that Asbury Park there along the ocean?
Yes, that's it. I knew you would figure it out.
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Old 02-14-2018, 04:56 PM   #18
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Yes, that's it. I knew you would figure it out.
I've been on most of those roofs there....lol!
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Old 02-14-2018, 05:01 PM   #19
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Quote:
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Maybe they're for CT leads going to the submetering device. .
You NEVER put a fuse in a CT circuit!

More likely they are for an electronic transducer of some sort, and the device needs a very small OCPD, smaller than 15A, so a breaker in the panel can't work for it.
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Old 02-14-2018, 05:21 PM   #20
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You NEVER put a fuse in a CT circuit!
I did not know that - why not? I never did it, never really thought about it until looking at hax's picture ...
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