The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Page 1 of 2 1 2 >
Topic Options
Rate This Topic
#114884 - 07/11/03 07:41 AM Open Knife Switch
Webmaster Offline

Administrator
Member

Registered: 10/07/00
Posts: 3142
Loc: NY, USA
 Quote:
This is a 30 amp service, with open knife switch fuse holder.

Rick Miell
Comments?

Top
Tools for Electricians:
#114885 - 07/11/03 08:24 AM Re: Open Knife Switch
ThinkGood Offline
Member

Registered: 08/07/02
Posts: 1084
Loc: Milwaukee, WI
I pity the fool who brushes up against it!

Top
#114886 - 07/11/03 08:45 AM Re: Open Knife Switch
SvenNYC Offline
Member

Registered: 08/19/02
Posts: 1685
Loc: 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

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.

Top
#114887 - 07/11/03 11:32 AM Re: Open Knife Switch
Tom Offline
Member

Registered: 01/01/01
Posts: 1069
Loc: 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.

Top
#114888 - 07/11/03 03:18 PM Re: Open Knife Switch
SvenNYC Offline
Member

Registered: 08/19/02
Posts: 1685
Loc: New York City
Here's a clearer picture from a Mexican manufacturer's website:



And this is its corresponding 30-amp plug fuse


Top
#114889 - 07/12/03 03:31 AM Re: Open Knife Switch
pauluk Offline
Member

Registered: 08/11/01
Posts: 7693
Loc: Norfolk, England
Rick,
Do you know how high above grade this was located?

Top
#114890 - 07/12/03 10:17 AM Re: Open Knife Switch
Bjarney Offline
Moderator

Registered: 04/10/02
Posts: 2561
Loc: 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.



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).]

Top
#114891 - 07/12/03 05:16 PM Re: Open Knife Switch
rmiell Offline
Member

Registered: 11/09/00
Posts: 261
Loc: 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

Top
#114892 - 07/12/03 06:06 PM Re: Open Knife Switch
Bjarney Offline
Moderator

Registered: 04/10/02
Posts: 2561
Loc: 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.}

Top
#114893 - 07/12/03 08:02 PM Re: Open Knife Switch
ThinkGood Offline
Member

Registered: 08/07/02
Posts: 1084
Loc: Milwaukee, WI
 Quote:
I have seen them over bathtubs...



Top
Page 1 of 2 1 2 >



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals