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What year did output voltages change?


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  #21  
Old 04-15-2017, 08:57:39 PM
Vanman Vanman is offline
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Default Re: What year did output voltages change?

And look at that- the first one clearly states 115 volt, yet the device looks to me like it dates from the "110 volt era" lol. I guess it could be from a later time, maybe even the '50's, eh?
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Old 04-16-2017, 07:28:39 AM
BHoward BHoward is offline
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Default Re: What year did output voltages change?

How about frequency ? Where I grew up in Ontario it was 25 cycl and came from Niagra Falls Canadian side. In 1948 they changed it to 60 cycle and we got a new 3 HP Woods grain grinder free . Our old one was 1.5 HP. Cheers Bill H.
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Old 04-16-2017, 12:09:04 PM
Frank DeWitt Frank DeWitt is offline
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Default Re: What year did output voltages change?

Here is another one. Wrong price but fun to look at. http://www.ebay.com/itm/RARE-Antique...gAAOxyKsZRy2Ys
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  #24  
Old 04-16-2017, 12:49:24 PM
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Motorhead Motorhead is offline
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Default Re: What year did output voltages change?

Frank, That would be a good LOAD BANK!
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  #25  
Old 04-16-2017, 01:46:42 PM
Vanman Vanman is offline
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Default Re: What year did output voltages change?

Southern California remained on 50 cycle power for quite some time as I understand it. I remember my dad (born in '35) saying that he remembered the change to 60 cycles. I got quite a few 50 cycle motors from my grandfather, that he had saved. Of course they work fine on 60 cycles. Would be really neat to have some 25 cycle motors. I saw a ~100 hp 15 cycle motor once. It was HUGE for just 100 hp lol.

Frank, I have one very similar to that one, but it's white enameled steel. Missing its cord, which is an odd connector, and I need to repair the element. Pretty neat though, definitely an oldie. Don't recall the make off hand. Pretty sure it's 110 volt.

Last edited by Vanman; 04-16-2017 at 04:32:23 PM. Reason: '35. Mom was born in'39
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Old 04-16-2017, 03:08:08 PM
George Andreasen George Andreasen is offline
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Default Re: What year did output voltages change?

Okay.........I'll settle this voltage thing for everyone. I have THE BOOK, from the early 1960's that states that "117 volts is nominal". There. Now you have the truth!

......or at least as that writer understood it.
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  #27  
Old 04-16-2017, 04:34:16 PM
Vanman Vanman is offline
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Default Re: What year did output voltages change?

It does seem like a lot of equipment from that era stated 117 volts. Like a compromise between 115 and 120. I believe that I have seen 118 as well.
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Old 04-16-2017, 07:21:25 PM
Birken Vogt Birken Vogt is offline
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Default Re: What year did output voltages change?

Of course they tell me down Mexico way they have 127/220Y, 60 cycles of course.

Although I am also told that the actual voltage down there is, you get what you get.

Try this one on for size: 121V.
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Old 04-16-2017, 08:19:00 PM
Steve Dawkins Steve Dawkins is offline
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Default Re: What year did output voltages change?

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Originally Posted by Birken Vogt View Post
Of course they tell me down Mexico way they have 127/220Y, 60 cycles of course. Although I am also told that the actual voltage down there is, you get what you get.

Several years ago, we vacationed in Cancun. Being an electrician, I always checked out electrical work wherever I went. (I know, it's a sickness.) YIKES, some of the work I saw in Mexico was downright scary. I think I took pictures. If i find them, I'll scan and post them for your amusement...or horror.


I have a friend that used to run a pre-school. When things were passed out to the kids; a treat, candy, toy, etc., some would protest that another kid got the one they wanted. My friend made a rule that the kids had to live by; "You get what you get, and you don't throw a fit!" To this day, we jokingly say that phrase when someone complains about something they got. (or didn't get.)
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Old 04-16-2017, 09:29:17 PM
Vanman Vanman is offline
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Default Re: What year did output voltages change?

So you probably do this too- walk into a building with an open ceiling, like a restaurant, and critique the pipe work....

121, eh? I can only imagine how amusing the conversation that led to that decision would have been to listen in on!
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Old 04-16-2017, 10:57:02 PM
Steve Dawkins Steve Dawkins is offline
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Default Re: What year did output voltages change?

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Originally Posted by Vanman View Post
So you probably do this too- walk into a building with an open ceiling, like a restaurant, and critique the pipe work....
YEP...restaurants, retail, big box stores, etc. Like I said, it's a sickness. There's no wonder I have a crick in my neck. Always on the lookout for generators too. I'm sad to say that Generacs appear to be winning the war around here. So goes the old saying "Low bid gets the job."

Years ago when Costco came into our area as Price Club, the EC wired all the 400 watt hi-bay lights in the store with romex. Probably miles of romex. Those lights were running on 277 or 480 volts. It caused quite a stir in the inspections office for that city, but the romex stayed in place. I think that situation initiated some new local rules under the AHJ clause in the NEC.
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  #32  
Old 04-17-2017, 08:53:30 AM
PopsGarage PopsGarage is offline
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Default Re: What year did output voltages change?

As a retired IBEW journeyman I an right along side of you looking up in the ceiling checking out the conduit runs and the supports along with the whips to the fixtures. in a few newer stores I have noticed a trend to use factory made plug and play whips. I remember one project years ago where the fixtures arrived pre lamped at least 50% did not work, no cost savings there. all things considered most of the commercial work that I have seen looks ok on the surface but you never know just how many short-cuts were installed.

Bob
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  #33  
Old 04-17-2017, 09:49:41 AM
Wayne 440 Wayne 440 is offline
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Default Re: What year did output voltages change?

Quote:
Originally Posted by Birken Vogt View Post
Of course they tell me down Mexico way they have 127/220Y, 60 cycles of course.

Although I am also told that the actual voltage down there is, you get what you get...

We have just about that in one strip mall here in town. It is a Y service and runs 126-127 phase to neutral most of the time. I had an office there 20 years ago, and we spent a lot of time replacing lamps. Power company here says anything between 110-127 is "within specs".
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  #34  
Old 04-17-2017, 09:56:57 AM
LRomero LRomero is offline
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Default Re: What year did output voltages change?

One thing to remember is that there are 3 different voltages to consider: Design Voltage, Supply Voltage, Nominal Voltage. A lot of references shows 115V as Design Voltage meaning if you wanted to design an electrical device you would design for 115V. Supply voltage is what power companies are required to supply to consumers. 110V is nominal voltage figuring the high ad low voltage based on system load and system resistance.

All 3 also have a +/- % tolerance as well.
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  #35  
Old 04-17-2017, 09:58:58 AM
dmeed dmeed is offline
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Default Re: What year did output voltages change?

I suppose with more and more LED and compact FL lamps - they usually are rated 100-277 volt - so they won't care about 127 at the lamp socket.

I know my local power is about 125-127 (single phase) - caused some issues with a UPS that took exception to the higher voltage and wouldn't kick out of backup - had to wire a 12v transformer as a buck autoformer to drop the input down to 115 so it wouldn't complain. Had a Crown audio amp that didn't like it that high when we first got it. Fortunately that amp has a switch to allow up to about 130 volts.

David M
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  #36  
Old 04-17-2017, 10:10:34 AM
Pete Spaco Pete Spaco is offline
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Default Re: What year did output voltages change?

Just to follow on from George A's post:

The 117 voltage spec is what we always considered "standard". I think the actual spec reads: " 117vac +/- 10%. That's 105 to 129.

BTW, I worked as a tech for Barber Coleman's Wheelco (temperature controls) division back in the late 1950's and we still got occasional orders for 25 cycle temperature controllers. I assumed that they went to Canada, but I don't know which province.

Pete Stanaitis
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Old 04-17-2017, 06:44:57 PM
armandh armandh is offline
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Default Re: What year did output voltages change?

if you looked in to the overhead of the 1968 addition to a building I once owned you would note...

long rows of florescent fixtures plugged into twist lock sockets ????

plugged into sockets they were considered furniture and fixtures with a shorter depreciation schedule.

a dollar saved from DCs grasp is a dollar earned. the 81 addition had no such plugged in lighting.
by 93 I had sold out of an industry that today and locally is 1/10 its former size.
by 99 traded out of the building.

Last edited by armandh; 04-17-2017 at 06:58:31 PM.
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Old 04-18-2017, 09:56:56 AM
grif grif is offline
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Default Re: What year did output voltages change?

Isla Mujeres, off the coast of Cancun.

The switch yard was hot, wide open, no locks, no people around, everything accessible without a ladder.

The power pole was right next to the open stairwell of a brand new condo on the north beach.

(all my brotherinlaws are card carrying electricians ;-)
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Old 04-18-2017, 11:57:42 AM
PnishrPW PnishrPW is offline
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Default Re: What year did output voltages change?

Here ya go, this is from a commercial panel replacement I did last Saturday. Idiots playing sparky...
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Old 04-18-2017, 12:08:19 PM
Power Power is offline
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Default Re: What year did output voltages change?

Quote:
Originally Posted by PnishrPW View Post
Here ya go, this is from a commercial panel replacement I did last Saturday. Idiots playing sparky...
How about a picture of the finished job?
Would enjoy seeing how you straightened it out.
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