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Q: 480 volts 100 amp what wire size?
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Can you get 120 volts from a 480 volts 3 phase Y generator?

NO, the 480 Volts Y -- is 4 wire system, with three wires which are hot legs @ 480 volts between each three hot legs. A mid tap is a neutral leg (ground) the white wire. Which gives 277 volts between it and any of the three hot legs. so a 4wire 480 volt Y system. Gives 480 /277 volts.


What voltage reading would you get from a 277 480 volt system?

From a three phase four wire distribution system the voltages would be as follows. From L1 to N - 277 volts. From L2 to N - 277 volts. From L3 to N - 277 volts. From L1 to L2 - 480 volts. From L2 to L3 - 480 volts. From L3 to L1 -480 volts.


100 hp motor at 480 volts what kw?

74.6 kw


How do you come up with 277 volts?

The star point or wye voltage of a 480 volt three phase four wire system is 277 volts. The 480 voltage is divided by the sq root of 3 (for 3 phases). The sq root of 3 is 1.73. 480 volts/1.73 = 277 volts. The same formula is used on all three phase four wire systems. 208 volts /1.73 = 120 volts, 416 volts /1.73 = 240 volts, 600 volts / 1.73 = 347 volts.


What is the required wire size for a 230 feet run 480 volt 100 amp?

Depends on length. The more length, the more resistance.


What is the volt drop on a cable 912 meters 480 volts and load of 54 amps?

The volt drop on a cable 912 meters 480 volts and load of 54 amps is 5% if you use 2/0 AWG wire and 2.4% if you use 300MCM wire. See Related Links below


Is 277 volt one hot wire?

No, 277 volts is the line to neutral of a 480 volt wye three phase system. L1- N, L2 - N and L3 - N will give you 277 volts. L1 to L2. L2 to L3 and L3 to L1 will give you 480 volts.


Why isn't everything rated at 480 volts?

Not everything needs to be. Many standard wire insulations are rated at 600 volts, some 300, and some are more or less. It would be cost-prohibitive to have everything rated at 480 volts. Especially things designed to operate at 120 volts. Things rated for 480 but running at 120 would be physically larger than necessary, and therefore more expensive. If you're wondering why everything doesn't just run at 480 it's because it's not safe for residential applications.


What is the primary amps on a 25kva tranformer with input volts 480 Volts AC?

if it's single-phase, 25,000 divided by 480.


I have a coolant motor with 420 volts in Lathe Machine but the supply voltage will be 480 volts. Can 420 volts 50Hz coolant motor can use in 480 volts 60Hz?

No, you'll burn your lathe motor up immediately. (it might last 30 seconds before it literally smokes.) You'll need to buy and install a "buck-boost" type transformer to drop the voltage from 480 to 420V. Best to have a qualified commercial electrician wire it up if you value your lathe.


What is the difference between a 2- pronged cable and a 4 - pronged cable?

2 prong is a hot and neutral and a 4 prong is a 3 phase with a ground wire.3 pole 4 wire meaning 3 hots could be 240 volts or 480 volts


Is sj cord rated for 300 volts to be used for 480 volt?

No. The voltage rating needs to be 600 volts for 480 volt power.