ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
dsk 13
doc 3
Admin 3
Recent Posts
Bathroom electrical
by doc. 08/19/17 06:53 AM
electircal ageing test on IPC
by SIAME. 08/15/17 02:43 AM
electrical aging test on IPC
by gfretwell. 08/15/17 12:27 AM
"Line level" audio on Cat 5?
by gfretwell. 08/08/17 10:39 PM
Fire alarm phone lines and color coding
by gfretwell. 08/08/17 10:26 PM
New in the Gallery:
Housebilding DIY wiring
Popular Topics(Views)
239,939 Are you busy
175,526 Re: Forum
167,790 Need opinion
Who's Online Now
0 registered members (), 60 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
Page 1 of 2 1 2
#152158 - 03/09/04 10:21 PM 1913 American Electrician's Handbook  
Admin  Offline

Administrator
Member
Joined: Oct 2000
Posts: 3,450
NY, USA
[Linked Image]

[Linked Image]

[Linked Image]

[Linked Image]
Quote
Attached is a picture of the first edition of the American Electricians Handbook 1913. Looking through the book I found a section on how to make device boxes from wood. I never new that was allowed.

Take Care
Joe
AKA mountainman
[Linked Image] - Thanks Joe!

[This message has been edited by Webmaster (edited 03-09-2004).]


Tools for Electricians:

#152159 - 03/09/04 11:24 PM Re: 1913 American Electrician's Handbook  
cpalm1  Offline
Member
Joined: Jan 2004
Posts: 66
wood boxes sound kind of like a fire hazard. don't worry though, they're perfectly safe because they are lined with asbestos [Linked Image]


#152160 - 03/10/04 07:12 AM Re: 1913 American Electrician's Handbook  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
Always interesting to read old stuff like this.

Wooden panelboards, with glass panels in the larger sizes, were quite common in England right up to the 1930s, although they weren't usually asbestos lined. Each plug-in porcelain fuse carrier (rewireable type) typically had a small asbestos insert.

Wooden patresses for light switches were also the norm, and in later years some people even constructed "back boxes" for the newer-style switches using any old scraps of wood.


#152161 - 03/10/04 05:13 PM Re: 1913 American Electrician's Handbook  
swedejr  Offline
Member
Joined: Dec 2003
Posts: 35
East Granby, Ct. US
Great stuff, Joe!


#152162 - 03/22/04 12:14 PM Re: 1913 American Electrician's Handbook  
SvenNYC  Offline
Member
Joined: Aug 2002
Posts: 1,691
New York City
Hi Paul,

The wooden pattress, in my experience, has always been used when mounting a surface mount switch or socket, like the one shown in the picture, to a plaster or masonry wall.

[Linked Image]

The reasoning is that you would use larger and longer screws (or nails) to anchor the block to the wall and then use the tiny wood screws that normally come with the switch or socket to fasten it to the pattress.

It makes for a much more secure installation than just using small wood screws to directly anchor the switch to the plaster wall. That way the device won't pull away from the wall when used.


#152163 - 03/23/04 10:49 PM Re: 1913 American Electrician's Handbook  
electure  Offline


Member
Joined: Dec 2000
Posts: 4,260
Fullerton, CA USA
Hey that's really neat!
I remember my grandmother's house when I was young. The fuse panel was in a wooden enclosure with a glass front, just like the one pictured.


#152164 - 03/24/04 12:56 PM Re: 1913 American Electrician's Handbook  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
Sven,
Yes, that was the typical application of the pattress block in Britain as well, and seeing as the majority of old houses had masonry walls, they were used by the dozen.

By the way, what holds the cover of that switch in place? The equivalent "tumbler" switches here had either a round threaded boss in the middle so you just tightened the cover onto it, or they had two small screws above and below the toggle to secure it.


#152165 - 03/24/04 02:27 PM Re: 1913 American Electrician's Handbook  
Texas_Ranger  Offline
Member
Joined: Dec 2001
Posts: 2,400
Vienna, Austria
Here wooden patresses were usually plastered in flush with the wall to provide something to screw into. If done right definitely much more solid than todays plastic wallplugs.
Weird, our toggle switches always had the cover screws to the left and the right of the toggle, except for the doubles. Some German retro toggles just have _one_ screw. Looks pretty weird.


#152166 - 03/26/04 12:12 PM Re: 1913 American Electrician's Handbook  
SvenNYC  Offline
Member
Joined: Aug 2002
Posts: 1,691
New York City
Paul & Ragnar,

The plastic cover snaps onto two metal clips on the base. You have to be careful when replacing the cover because the phenolic plastic breaks easily.

It used to be that the base was made out of glazed ceramic (porcelain). However all the surface-mount made within the past 20 years have been entirely made of thermoset plastic (Urea or Bakelite).


#152167 - 03/27/04 05:51 AM Re: 1913 American Electrician's Handbook  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
The older tumbler switches here had a procelain base as well. I'll see if I can dig one or two out of my junk box and post some pics later.


#218636 - 07/17/17 06:44 PM Re: 1913 American Electrician's Handbook [Re: Admin]  
Admin  Offline

Administrator
Member
Joined: Oct 2000
Posts: 3,450
NY, USA
I just got ahold of a 1953 (7th) Edition on this book. One section details how to test for voltage using Fingers and Tongue.

I wonder how long that section stayed in the Book?

Bill


#218642 - 07/19/17 08:12 PM Re: 1913 American Electrician's Handbook [Re: Admin]  
HotLine1  Offline


Member
Joined: Apr 2002
Posts: 6,857
Brick, NJ USA
Bill:

Only the 13th Edition survived hurricane Sandy. I lost a few older ones back to mid60s

What section is that in?? Hope it's not still in there.

Funny, someone earlier in the week was talking about one of the 'older' inspectors that used to test with two fingers!!! They asked me if he was still around.


John

#218643 - 07/19/17 08:41 PM Re: 1913 American Electrician's Handbook [Re: HotLine1]  
Admin  Offline

Administrator
Member
Joined: Oct 2000
Posts: 3,450
NY, USA
John,

It's in Division 1, Fundamentals, Measuring, Testing and Instruments.

Disclaimer - Not a Good idea!!

I didn't want to quote here, but others have.

Bill


#218646 - 07/20/17 08:42 AM Re: 1913 American Electrician's Handbook [Re: Admin]  
Potseal  Offline
Member
Joined: Feb 2013
Posts: 236
Saskatchewan
Originally Posted by Admin
I just got ahold of a 1953 (7th) Edition on this book. One section details how to test for voltage using Fingers and Tongue.

I wonder how long that section stayed in the Book?

Bill


When my wife and I bought our first house, and before I got into the trade, we had an electrician come over to move a ceiling outlet for a light fixture. He was a former school teacher and friend of my father-in-law. I watched him as he worked and offered any assistance. At some point he checked to see if the circuit was live and did exactly that - used two fingers! Never forgot that. Years later when I was apprenticing I told my journeyman this story and despite being in the trade for nearly 40 years he said he never seen anyone in the trade do that.


A malfunction at the junction

#218653 - 07/20/17 01:08 PM Re: 1913 American Electrician's Handbook [Re: Admin]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,103
Estero,Fl,usa
I have detected voltage with my fingers but never on purpose wink
I can say 400hz will wake you up. It is more of a ring than a buzz.


Greg Fretwell

#218658 - 07/27/17 03:10 PM Re: 1913 American Electrician's Handbook [Re: gfretwell]  
annemarie1  Offline
Member
Joined: Mar 2015
Posts: 57
england
My old house which was wired in 1953 had wooden blocks behind all the switches and sockets except for the cooker control unit which was a big iron box fixed straight to the wall


#218667 - 07/30/17 10:06 AM Re: 1913 American Electrician's Handbook [Re: Admin]  
HotLine1  Offline


Member
Joined: Apr 2002
Posts: 6,857
Brick, NJ USA
Greg:

I remember having y hand thru a handhole in a pylon neon sign. Dumb move on my part was not confirming 120 volt was 'off''. Got to feel the sting of the 15Kv neon xfr.

Like I said, long ago, and DUMB.


John

#218669 - 07/31/17 07:15 AM Re: 1913 American Electrician's Handbook [Re: Admin]  
Texas_Ranger  Offline
Member
Joined: Dec 2001
Posts: 2,400
Vienna, Austria
In Austria I've seen panels partly made of wood well into the 1970s. My parents own a weekend home that received a new combo meter enclosure/consumer unit in 1976. The visible parts are all powder-coated metal but once you get behind the covers and frame it's a wooden box lined with asbestos. I suspect that might have been an ad-hoc solution on site because the wall is only barely thick enough to accommodate the unit, more commonly these enclosures were just open and you could see the plastered brick wall through them. I think completely enclosed meter cabinets only became a requirement in the mid-1990s so now there's usually a metal tub. Mind you, these things are large, most distribution network operators suggest three-meter enclosures for single-family domestic buildings, either for a night-rate meter and tariff switch or more recently for photovoltaic cells with a dedicated meter.


Page 1 of 2 1 2

Member Spotlight
cookcc
cookcc
California ,Long Beach
Posts: 28
Joined: May 2007
Show All Member Profiles 
Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.021s Queries: 15 (0.002s) Memory: 0.8887 MB (Peak: 1.1256 MB) Zlib enabled. Server Time: 2017-08-19 15:07:51 UTC