# Standard voltage between 600 and 2400?

Is there a North American standard voltage between 600 and 2400? I believe 1320V is a standard voltage, but is it used much?

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Matthew Beasley wrote:

Never heard or saw one in 35 years.
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| Is there a North American standard voltage between 600 and 2400? I believe | 1320V is a standard voltage, but is it used much?
There is 1000Y/577 that has traditionally been used only in mine operations. Manufacturers like Square-D and Cutler-Hammer make some equipment rated for that voltage system.
A few years ago I was looking through service guides for various power companies in the USA. I found one that offered a 831Y/480 service. I'm guessing the only use of it would be 480 volt loads wired L-N, such as specially wired motors, or street lighting. Circuit breakers for it would probably have to be the ones for 1000Y/577.
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| Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below |
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snipped-for-privacy@ipal.net wrote:

I think fort he US and for premise wiring systems covered by the NEC the following applies.
Voltage, Nominal. A nominal value assigned to a circuit or system for the purpose of conveniently designating its voltage class (e.g., 120/240 volts, 480Y/277 volts, 600 volts). The actual voltage at which a circuit operates can vary from the nominal within a range that permits satisfactory operation of equipment. FPN: See ANSI C84.1-1995, Voltage Ratings for Electric Power Systems and Equipment (60 Hz).
There are many other systems. For example, railway, ships, mines, autombiles, and aircraft equipment to name a few.
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snipped-for-privacy@electrician2.com wrote:

There are also these voltages listed for utilities in the NESC. 2002 National Electrical Safety Code Table 110-1 Nominal Voltage Between Phases Typical BIL Dimension "R" m ft 151-7200 95 3.0 10.0 13 800 110 3.1 10.1 23 000 150 3.1 10.3 34 500 200 3.2 10.6 46 000 250 3.3 10.9 69 000 350 3.5 11.6 115 000 550 4.0 13.0 138 000 650 4.2 13.7 161 000 750 4.4 14.3 230 000 825 4.5 14.9 230 000 900 4.7 15.4 345 000 1050 5.0 16.4 345 000 1175 5.3 17.3 345 000 1300 5.5 18.3 500 000 1550 6.0 19.8 500 000 1800 6.6 21.5 765 000
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Yes, 1000V is used on some underground mining equipment, as well as 1500V. Both of these are very specialized and not considered common however. Medium voltage is considered to be anything 1000V and over, up to 25kV, but the first jump in common utilization is 2400V (nominal).
By the way, you said 1320V, but there is no such thing. I think you dropped a zero off of 13,200V, which is a common distribution voltage.
On 10 Oct 2006 10:23:07 GMT, snipped-for-privacy@ipal.net wrote:

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