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#79029 - 11/16/01 09:16 PM NEC historians wanted  
golf junkie  Offline
Member
Joined: Apr 2001
Posts: 507
York, NE
One of my co-workers has a copy of the 1925 NEC. One of the things that we noticed was that there is a requirement that all devices, switches, etc. have the feed connected at the top and the load at the bottom.

I was taught that this is the "right" way to wire a toggle switch. But, that it is done as a courtesy for the next electrician.

Any old timers remember when this was removed from the NEC?

Are there other examples of things that are trade conventions that have been removed from the code?


GJ


2017 / 2014 NEC & Related Books and Study Guides

#79030 - 11/19/01 01:40 PM Re: NEC historians wanted  
George Corron  Offline
Member
Joined: May 2001
Posts: 717
Lorton, Va USA
GJ,
The only one that comes readily to mind is 210-4 (I think) that was removed after the 1971 code, that is where Black, Red, Blue come from. If I go into why, we start a BIG fight.

George


#79031 - 11/19/01 06:06 PM Re: NEC historians wanted  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
Sounds fascinating, George.

Tell us more..... [Linked Image]


#79032 - 11/19/01 06:27 PM Re: NEC historians wanted  
rmiell  Offline
Member
Joined: Nov 2000
Posts: 242
La Junta, Co. USA
I recently saw a 1923 edition of the NEC (I think it was '23) sell for over $500 on eBay. Makes you think, doesn't it?

I will check my older editions for this particuliar change, and post back later.

Rick Miell


#79033 - 11/19/01 08:07 PM Re: NEC historians wanted  
motor-T  Offline
Member
Joined: Nov 2001
Posts: 280
Girard, Ohio, USA
golf-junkie
This is the way I always thought it to be. I was taught line on top load on the bottom just like any other switch.
I guess I would be considered an old timer, I'm 56 but no I dont remember this being in the code its just the way it was taught, and I always thought it simplified things to keep all switches the same, regardless how small.


#79034 - 11/19/01 09:22 PM Re: NEC historians wanted  
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,311
I could swear it was 'in there', but i just can't find anything, Only a 110.3(b) copout [Linked Image]


#79035 - 11/19/01 10:58 PM Re: NEC historians wanted  
electure  Offline


Member
Joined: Dec 2000
Posts: 4,260
Fullerton, CA USA
My first Code book, a '68, had the Section you're referring to, George. (I was told I'd have to learn the "color code", so I mistakenly studied the color code for resistors [Linked Image]) '71 also changed the conduit fill table (from 3-#12 in a 1/2", 5 in a 3/4) radically. I thought I was never going to understand the Code.
Now, I know I never will. [Linked Image]


#79036 - 11/20/01 12:14 AM Re: NEC historians wanted  
George Corron  Offline
Member
Joined: May 2001
Posts: 717
Lorton, Va USA
Yeah, all us old geezers with memories, I've got code books all the way back to 71 myself. Remember when 370 said a 4"X4"X1.5" box had 24"? Then some smart joker filled one with water to find out the rounded corners only had 21"?
384-3(f) says the phasing arrangements are top to bottom, left to right, front to back, probably where our "hot on the top" comes from. Y'all quit jogging my memory with all this old junque
No way Paul, we all get along in this forum, and someone a few months ago touched on it, but it was dropped fast.


#79037 - 11/20/01 07:42 AM Re: NEC historians wanted  
George Corron  Offline
Member
Joined: May 2001
Posts: 717
Lorton, Va USA
One more post on the topic. It was late last night and I did not feel like breaking out my code book. From 380-6 (c) Connection of switches - ..........shall be connected so that the blades are de-energized when the switch is in the open position. .........shall be connected so that the terminals supplying the load are de-energized when the switch is in the open position. Most disconnects are made so that you would have to connect the feed to the top to meet these requirements.


#79038 - 11/20/01 08:47 AM Re: NEC historians wanted  
electure  Offline


Member
Joined: Dec 2000
Posts: 4,260
Fullerton, CA USA
George, you brought up a very good point.
ALWAYS, yes ALWAYS, test disconnects when you shut them off to make sure they're wired correctly. I've run across quite a few that were wired backwards, and this leaves the fuses HOT! (& I'm still here to talk about it)


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