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Potheads are seldom oil filled in my area (USA). There are filling compounds with varying properties, everything from petrolatum to Ozite.

Look at NEC 250.142 (A) which allows the grounded conductor (neutral) to serve as the equipment grounding conductor on the supply side of the service disconnecting means.

The generator was evidently removed by the previous tenant. Is it a reasonable assumption that there exists the functional equivalent of a service entrance rated transfer switch? Thanks for all the help, Dave

Thanks all. I have attached a better photo of the nameplate.http://files.engineering.com/getfile.aspx?folder=63e8c12b-29a5-42ab-be3d-28bdde8477be&file=nameplate.JPG

Tack!

I'd use Google to find how to say "Thank You" in Swedish, but I fear what that translation might say! Dave

Thanks, Gunnar! I knew your translation would be far superior to Google. Google gave me "emergency generator"! Best to you, HDP

Can one of you more international gents let me know what this device is? I think it is a generator transfer switch. A USA associate is looking at properties and needs some advice as to electrical infrastructure. Thanks, HDP

NEC Article 240.21C2 permits these secondary conductors to be run 10' without additional protection, providing the conditions of this article are all met.

This was run in the Chicago tribune. http://my.chicagotribune.com/#section/-1/article/p2p-74345124/

I believe Bill's post is on the money. I worked for years for a mid-southern utility. One particularly bad storm involved a heavy freezing rain. It was a 20 year event. We started patrolling, looking for open cutouts. We had to backtrack when a veteran explained that the fuse barrels might...

Check with Hipotronics. They are in upstate New York.

Pardon my spell check for incorrectly providing "contractor" for contactor!

I have been involved in a couple of situations where a single-phasing event during a storm was interpreted as a "surge" issue. In both cases, the contractor control power was derived inside the customer facility from a 480V-208Y120V transformer. The damage was caused by the reduced voltage on...

You might look at Article 511. It is generally applicable to this type of facility.

Per the 2011 version of the NEC, Article 300.3C(2)(c) Over 600V... "In manholes, if the conductors of each system are permanently and effectively separated from the conductors of the other systems and securely fastened to racks, insulators, or other approved supports, conductors of different...

Is there a possibility that the burn marks at the grounded end of the termination were due to voltage rise of the shielding under fault conditions?

To my knowledge, the two scopes of work you mention will require two different instruments. As mentioned above, a 3 point instrument is typically used for work during the "civil" phase. To perform ground resistance testing after the static is connected (without disconnecting leads) requires a...

Not sure about your version; however, in AutoCad LT 2010, there is a "dynamic input" button that controls this behavior. Check your help files for "dynamic input".

If you are interested in photovoltaic systems, there is very good information at the New Mexico State University site. Google "Southwest Technology Development Institute".