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Posted By: renosteinke Unusual Box and cover - 08/07/06 09:19 PM
It appears that the sparky found a way to both increase box capacity, as well cover the box. [Linked Image]
Posted By: Hemingray Re: Unusual Box and cover - 08/08/06 01:11 AM
now how was THIS accomplished? [Linked Image]
Posted By: Dnkldorf Re: Unusual Box and cover - 08/08/06 02:33 AM
He couldn't find an extender box?

The trouble people go through, to do something wrong amazes me..

Looks like he needs bender practice too.

[This message has been edited by Dnkldorf (edited 08-07-2006).]
Posted By: SvenNYC Re: Unusual Box and cover - 08/08/06 02:39 AM
So yeah....how DID this guy attach a box to a box?
Posted By: renosteinke Re: Unusual Box and cover - 08/08/06 03:52 AM
The boxes are ever so slightly out of alignment.... he ran the scres mos of the way in, then inserted with a twist, so the screw heads caught on the tabs of the other box.
Posted By: Luketrician Re: Unusual Box and cover - 08/08/06 08:06 AM
Genius! Now that's real smart. [Linked Image]Looks like that conduit on the right was "swooped" down, instead of a nice offset..
Posted By: renosteinke Re: Unusual Box and cover - 08/08/06 01:49 PM
Luke, blame that on my poor picture... that "swoop" is actually the only time I've ever seen "smurf tube" used.... it's not always blue!
Posted By: SvenNYC Re: Unusual Box and cover - 08/08/06 02:19 PM
I'll just sit here and continue scratching my head over those boxes. LOL

What's funny is that sort of stupidity would have never crossed my head. There are just some things that you just can't....conceive, ya know? [Linked Image]
Posted By: JJM Re: Unusual Box and cover - 08/08/06 06:11 PM
Well... look it this way, at least box fill requirements likely weren't violated. How very code conscious.

Imagine the time spent "adjusting" the screws just right to get the "cover box" locked into place.

Joe
Posted By: Lostazhell Re: Unusual Box and cover - 08/09/06 12:34 AM
Are we sure thats not an extension ring facing the wall with a box on the "wrong" side?
Posted By: renosteinke Re: Unusual Box and cover - 08/09/06 12:46 AM
Yes, Randy.... I had the pleasure of dismantling this thing....

The former tenant of this industrial property had, by all appearances, an engineering degree. There were many, many curious wiring practices.

For example, I had never before seen a 1:1 transformer! I just assumed transformers were for changing the voltage; I have no idea what he was trying to accomplish.
Posted By: skingusmc Re: Unusual Box and cover - 08/09/06 02:55 AM
renosteinke -

"For example, I had never before seen a 1:1 transformer! I just assumed transformers were for changing the voltage; I have no idea what he was trying to accomplish."

That sounds like an "Isolation Transformer":

"Isolation transformer
From Wikipedia, the free encyclopedia

An isolation transformer is a transformer, often with symmetrical windings, which is used to decouple two circuits. An isolation transformer allows an AC signal or power to be taken from one device and fed into another without electrically connecting the two circuits. Isolation transformers block transmission of DC signals from one circuit to the other, but allow AC signals to pass. They also block interference caused by ground loops. Isolation transformers with electrostatic shields are used for power supplies for sensitive equipment such as computers or laboratory instruments.

In electronics testing, troubleshooting and servicing, an isolation transformer is a 1:1 power transformer which is used as a safety precaution. Since the neutral wire of an outlet is directly connected to ground, grounded objects near the device under test (desk, lamp, concrete floor, oscilloscope ground lead, etc.) may be at a hazardous potential difference with respect to that device. By using an isolation transformer, the bonding is eliminated, and the shock hazard is entirely contained within the device.

In a pinch, a line-voltage isolation transformer may be made by determining the total load of the device under test and finding two identical line transformers each capable of handling the load. A power cord is attached to the primary of one transformer, an outlet to the primary of the other transformer. The secondaries are then connected to each other. An example with two 120 V:12 V transformers would yield 120 V → 12 V → 12 V → 120 V.

Isolation transformers are commonly designed with careful attention to capacitive coupling between the two windings. This is necessary because excessive capacitance could also couple AC current from the primary to the secondary. A grounded shield is commonly interposed between the primary and the secondary. Any remaining capacitive coupling between the secondary and ground simply causes the secondary to become balanced about the ground potential."

Steve
Posted By: Luketrician Re: Unusual Box and cover - 08/09/06 09:39 PM
Ahh I see now Reno, and now that you mentioned it. Gray smurf. You don't see smurf tube out here in nuclear land. Been awhile since I ran that stuff.
Posted By: HotLine1 Re: Unusual Box and cover - 08/10/06 11:02 PM
Guess the craftsman is/was out at the store buying straps??? Not a one to be seen. So much for pride in workmanship!

Did you find a EGC in the smurf??

John
Posted By: renosteinke Re: Unusual Box and cover - 08/11/06 12:56 AM
Hot Line, I must confess that I never looked into the smurf... cold as it may sound, the smurf was well outside the scope of the work I was hired to do.
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