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#86580 - 11/13/03 06:27 AM Old Style Service Main Disconnecting Means  
Joe Tedesco  Offline
Member
Joined: Oct 2000
Posts: 2,749
Boston, Massachusetts USA
Called a "London Box" these main disconnects are still in use in the Boston area. I am looking for any information, or instructions on their use. I imagine that they were installed in the early 1900's per the NEC?

[Linked Image]


Joe Tedesco, NEC Consultant

2017 / 2014 NEC & Related Books and Study Guides

#86581 - 11/13/03 01:07 PM Re: Old Style Service Main Disconnecting Means  
SvenNYC  Offline
Member
Joined: Aug 2002
Posts: 1,691
New York City
Do new houses in Boston also use these, albeit with modern-day components?

It looks like a good idea if the house needs a drastic rewiring inside or for firemen to cut electricity to the building that's burning up.


#86582 - 11/13/03 01:55 PM Re: Old Style Service Main Disconnecting Means  
Joe Tedesco  Offline
Member
Joined: Oct 2000
Posts: 2,749
Boston, Massachusetts USA
Sven:

Most are removed and replaced with new equipment, and when a new building is supplied with a new electrical service lateral, they don't use this type of equipment anymore.

Many buildings here are remodeled, and the service "end box" is where these old wires usually land before the metering.

You can search on NSTAR the electric utility here and see what their rules state about these disconnects.
http://www.nstaronline.com/


I am looking for information on these "old mains" and will appreciate hearing from anyone who has more information on them.

I have more images and will post them here soon.


Joe Tedesco, NEC Consultant

#86583 - 11/13/03 06:11 PM Re: Old Style Service Main Disconnecting Means  
Joe Tedesco  Offline
Member
Joined: Oct 2000
Posts: 2,749
Boston, Massachusetts USA
[Linked Image]

Located in Cambridge, MA. I believe that this is still in use for stores on Massachusetts avenue?


Joe Tedesco, NEC Consultant

#86584 - 11/13/03 10:09 PM Re: Old Style Service Main Disconnecting Means  
Bill Addiss  Offline
Member
Joined: Oct 2000
Posts: 3,878
NY, USA
Interesting looking stuff here Joe!

[Linked Image]
Bill


#86585 - 11/13/03 10:48 PM Re: Old Style Service Main Disconnecting Means  
txsparky  Offline
Member
Joined: May 2001
Posts: 552
Magnolia,.Texas U.S.A.
Hey!!! Is 110.12(C) violated when equipment is spray painted with graffiti? [Linked Image]

Wow ,I find it hard to believe that this stuff is still in use, and without covers! [Linked Image] Doesn't the inspectors in the area have any say so on this?


Donnie

#86586 - 11/29/03 11:14 PM Re: Old Style Service Main Disconnecting Means  
sparked  Offline
Member
Joined: Sep 2003
Posts: 114
Raleigh
Does that breaker in the top say Noark? As in Federal Pacific? I wonder how it lasted this long...



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