mbrooke
Batteries Included
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- United States
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- Technician
Fused neutrals
- Thread starter mbrooke
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al hildenbrand
Senior Member
- Location
- Minnesota
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- Electrical Contractor, Electrical Consultant, Electrical Engineer
OK. So, in your own words, what is being illuminated, in your opinion?
K8MHZ
Senior Member
- Occupation
- Electrician
K8MHZ
Senior Member
- Occupation
- Electrician
The above disconnect was still in service when it was pulled, circa 2008 or so. It was feeding a 200 amp 120/240 volt panel. This was in a large house, 2 stories. Window shaker A/C. The inspector had the POCO shut off the electricity to the house. The disco was fed by 2 30 AWG conductors coming from the bottom of the meter.
PaulMmn
Banned
- Location
- Union, KY, USA
- Occupation
- EIT - Engineer in Training, Lafayette College
GU24 is your friend
Isn't this the same socket you use to plug in the 'starter' on a fluorescent light?
mbrooke
Batteries Included
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- United States
- Occupation
- Technician
The requirement of earthing early electrical systems.
mbrooke
Batteries Included
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- United States
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- Technician
mbrooke
Batteries Included
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- United States
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- Technician
Why the power cut? I don't see a dire emergency.
mbrooke
Batteries Included
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- United States
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- Technician
Similar, but the fluorescent is way smaller.
Search for GU 24, its now used on some fixtures with goal of only accepting energy star light bulbs.
K8MHZ
Senior Member
- Occupation
- Electrician
It was failed on a rental inspection. In the city, all rentals must be inspected every two years. If it were just an owner occupied home, it may have never been seen.
K8MHZ
Senior Member
- Occupation
- Electrician
Were the bottom fuses added latter?
BTW, I owe you, thanks!
I have no idea. I have never seen anything like that before or since. The bottom fuse holders fit right inside knockouts. They may be lamp holders that someone decided to use for a fuse holder. I don't know.
mbrooke
Batteries Included
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- United States
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- Technician
Got it.
mbrooke
Batteries Included
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- United States
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- Technician
I think they were added latter. Just my guess.
synchro
Senior Member
- Location
- Chicago, IL
- Occupation
- EE
Agree, they look just like these lampholders rated at 660 watts - probably good for no more than 6 amps :happysad:
https://www.homedepot.com/p/Leviton...-Incandescent-Lampholder-White-9350/301667455
al hildenbrand
Senior Member
- Location
- Minnesota
- Occupation
- Electrical Contractor, Electrical Consultant, Electrical Engineer
:blink:
Well, ya, that's what you are wondering about. You said that in the previous sentence,
And then you said that the eleven page PDF shed some light on it.
So, now that you are seeing light shed on what you are wondering about, in your own words, what are you understanding from the eleven page document?
al hildenbrand
Senior Member
- Location
- Minnesota
- Occupation
- Electrical Contractor, Electrical Consultant, Electrical Engineer
Note the open rectangular cutout in the sheet metal of the top of the box. In my experience, this was for the electric meter to settle on, and allowed the conductors to and from the meter to pass.
I'll bet that this is a PoCo approved Service Center, may even have been supplied by the PoCo with the meter. The Safety Switch lever handle, allowing the occupant to operate the disconnect without opening the enclosure, offered the same additional safety for personnel that the bottom, exterior fuse holders would also supply.
I regret that I don't have a photo, but I removed a dwelling single branch circuit 30 Amp 120 Volt service center, manufactured by Square D, that was quite similar. At the time I removed it, for a service relocation and upgrade, it was still in service with the PoCo meter present. It had a deadfront that allowed the replacement of the Edison fuse without opening the wire containing enclosure.
al hildenbrand
Senior Member
- Location
- Minnesota
- Occupation
- Electrical Contractor, Electrical Consultant, Electrical Engineer
From the "Electrical Record" you posted a link to earlier in this thread,
In the section titled "Loading of the Final Circuit" they write about the "so-called 660 Watt rule." And later talk about the 6 Amp flat iron. I think a lot has to do with who was regulating the installation of the specific Premises Wiring (System) at that time. The is good indication of how Electrical Engineers didn't have regulatory standing until around 1920.
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
Style, yes. Pin size and spacing, no.
romex jockey
Senior Member
- Location
- Vermont
- Occupation
- electrician
Now I'm wondering if the original poco delta systems fared better w/fused noodles? ~RJ~
mbrooke
Batteries Included
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- United States
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- Technician
Do they make 660 watt incandescent lamps? As far as I'm concerned, its an arbitrary number- I mean imagine having to calculate a basement, laundry or closet pull chain as 660 watts.
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