He is correct about the tap changers, most stations have automatic tap changers depending on the demand throughout the day. Also the closer to the station the higher the voltage and the farther away the lower the voltage especially on the lower primary voltages. If a customer or customers on a particular transformer are complaining about the voltage being to high or to low they can open the transformer and change the tap.
It also depends on how far away one is from a substation. The closer one is from a substation the voltage will probably be over 120 volts. And those further away from a substation the voltage would be less than 120 volts as a whole.
I'm pretty sure the Range A service voltage on ANSI C84.1 is actually 114 V-126 V, and Range B is 110 V-127 V. It's actually the Utilization Voltage at the equipment terminals after accounting for all voltage drops that has a range A of 108-126. The Range B for utilization voltage is actually 104-127V. Range A is permissible for continuous operation, while range B should provide adequate performance but should not be prolonged.
Just got a motor marked 115/230 manufacturer says its good for 208 which is true +/- 10% . But my voltage at disconnect is 202-198 which puts me out of range causing heat and more amps. I was told 208 motors do not meet efficiency standards, and that's why. But this is going to cause some issue and or alot of buck/boost xfmer.
Many if not all modern central AC units and other 240 volt appliances meant for residential use give ratings for 240 & 208 or sometimes 120/240 & 120/208.
@@PW_12345 I wonder if the 240v bulb would even be bright enough to be useful. I had a headlight that was dim on a car once and it had good power and ground while the light was on. Removed the bulb and saw it was for a 24v system. First one I have ever seen but it was about as bright as candle lol. The filament was a lot thicker and had more turns from the looks of it.
220Y/127 is also a industry standard voltage used in South America , but also can be found in the US and Canada. Manufacturers have adjusted to that. You'll see some power supplies that say 100-127 on them.
![Purpose of the NEC [90.1, 2020 NEC]](http://i.ytimg.com/vi/cOFAl_1Utkg/mqdefault.jpg)
He is correct about the tap changers, most stations have automatic tap changers depending on the demand throughout the day. Also the closer to the station the higher the voltage and the farther away the lower the voltage especially on the lower primary voltages. If a customer or customers on a particular transformer are complaining about the voltage being to high or to low they can open the transformer and change the tap.
I've always wondered why different things have different voltage ranges! Thanks for this!
Most standard secondary voltages are the same in North America with the exception of 277/480 in the states compared to 347/600 in Canada.
you're right mike haha I haven't seen this taught anywhere else and didn't know I needed it great vid
It also depends on how far away one is from a substation. The closer one is from a substation the voltage will probably be over 120 volts. And those further away from a substation the voltage would be less than 120 volts as a whole.
I'm pretty sure the Range A service voltage on ANSI C84.1 is actually 114 V-126 V, and Range B is 110 V-127 V. It's actually the Utilization Voltage at the equipment terminals after accounting for all voltage drops that has a range A of 108-126. The Range B for utilization voltage is actually 104-127V. Range A is permissible for continuous operation, while range B should provide adequate performance but should not be prolonged.
Correct
Major Vermont utility still runs 12,470 Volts 3 phase distribution
While monitoring the utility voltage coming in at a campus facility, 504V on a 277/480 volt system always made me nervous.
😅
Just got a motor marked 115/230 manufacturer says its good for 208 which is true +/- 10% . But my voltage at disconnect is 202-198 which puts me out of range causing heat and more amps. I was told 208 motors do not meet efficiency standards, and that's why. But this is going to cause some issue and or alot of buck/boost xfmer.
Many if not all modern central AC units and other 240 volt appliances meant for residential use give ratings for 240 & 208 or sometimes 120/240 & 120/208.
@Sparky-ww5re I'm talking like rooftop ex fans
It's not a 2x4, it's actually a 1.5x3.5.
The very last batch of incandescent lights I purchased had 130V stamped on the bulb. It made me wonder if they will be bumping the voltage up.
@@PW_12345 I wonder if the 240v bulb would even be bright enough to be useful. I had a headlight that was dim on a car once and it had good power and ground while the light was on. Removed the bulb and saw it was for a 24v system. First one I have ever seen but it was about as bright as candle lol. The filament was a lot thicker and had more turns from the looks of it.
220Y/127 is also a industry standard voltage used in South America , but also can be found in the US and Canada. Manufacturers have adjusted to that. You'll see some power supplies that say 100-127 on them.
Donald Trump rewired the incandescent bulbs to make America great again