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#114884 - 07/11/03 10:41 AM Open Knife Switch  
Admin  Offline

Administrator
Member
Joined: Oct 2000
Posts: 3,437
NY, USA
[Linked Image]
Quote
This is a 30 amp service, with open knife switch fuse holder.

Rick Miell
Comments?


Tools for Electricians:

#114885 - 07/11/03 11:24 AM Re: Open Knife Switch  
ThinkGood  Offline
Member
Joined: Aug 2002
Posts: 1,081
Milwaukee, WI
I pity the fool who brushes up against it!


#114886 - 07/11/03 11:45 AM Re: Open Knife Switch  
SvenNYC  Offline
Member
Joined: Aug 2002
Posts: 1,691
New York City
Oh yes!!!! Right up my alley!!!

I love those Frankenstein switches!

Might pick up one when I go to Tijuana this coming week. Apparently they're still used for 30-amp services [Linked Image]

I notice the meter has been removed and replaced with a blanking plate. Who does this and how is the plate attached?

Don't worry guys, If I do find that knife-switch, I will not install it in the apartment's electrical system.


#114887 - 07/11/03 02:32 PM Re: Open Knife Switch  
Tom  Offline
Member
Joined: Jan 2001
Posts: 1,044
Shinnston, WV USA
I've seen plenty of these indoors, but I do believe that this is the first time I've ever seen one outside.

Is the neutral fused or is this a 220 volt no neutral service.

Scary!


Few things are harder to put up with than the annoyance of a good example.

#114888 - 07/11/03 06:18 PM Re: Open Knife Switch  
SvenNYC  Offline
Member
Joined: Aug 2002
Posts: 1,691
New York City
Here's a clearer picture from a Mexican manufacturer's website:

[Linked Image]

And this is its corresponding 30-amp plug fuse

[Linked Image]


#114889 - 07/12/03 06:31 AM Re: Open Knife Switch  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
Rick,
Do you know how high above grade this was located?


#114890 - 07/12/03 01:17 PM Re: Open Knife Switch  
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
It’s a bit hard to make out, but Sven’s catalog find is perfect—the "disconnecting means” looks even more suicidal...index finger in a very spartan phenolic ring.

[Linked Image]

It’s most likely that the “blanked-off” service is 120V (2-wire) with fused neutral. The object at 5 o’clock on the meter ring in the original image may be a padlock seal. { Plastic seal pic.}


"No aprobado por los laboratorios debajo de escritores." ;-)




[This message has been edited by Bjarney (edited 07-12-2003).]


#114891 - 07/12/03 08:16 PM Re: Open Knife Switch  
rmiell  Offline
Member
Joined: Nov 2000
Posts: 242
La Junta, Co. USA
Meter was right at 6' from grade. The local utility removed the meter when customer, who had lived in the house for 60+ years, was put into a nursing home. Blank is held in place with the meter ring, which has a screw to tighten it around the meter base.

This is the 1st time I have seen one of these outdoors, though I have seen them over bathtubs, on back porches, and above door ways, but all were inside, not outside.

SVEN, send me your address and I will send you one of these, maybe even the one in the picture!

Rick


#114892 - 07/12/03 09:06 PM Re: Open Knife Switch  
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
It’s likely that the original installation was covered with a wooden “dog house” {made of the same material as the siding; topped with matching roofing material and fitted with a hinged door for the meter reader.}


#114893 - 07/12/03 11:02 PM Re: Open Knife Switch  
ThinkGood  Offline
Member
Joined: Aug 2002
Posts: 1,081
Milwaukee, WI
Quote
I have seen them over bathtubs...


[Linked Image]


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