0
What size hot wires neutral wire and ground wire do you need to feed a 200 amp single phase sub panel coming from a 400 amp service?
Wiki User
∙ 10y agoWant this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
How many wires in a single phase motor?
There should be 2 or 3 wires. A hot, a neutral and sometimes a ground.
Do you need a 20 amp single or double pole breaker for your washer?
Washing machines in the U.S. operate on 120 volts. That requires a single pole 20 amp breaker and wired with 12/2 w-ground wire. Black to the breaker, white to the neutral bus bar, and copper ground to the ground bus bar.
How can you get a 240V single-phase power from a 120V 3-phase service?
First of all there is no common three phase 120 volt service. There is in North America a three wire 120/240 volt single phase service. That being said, if you want to change a 120 volt source to 240 volts it must be done with a transformer. Its classification is a step up transformer. The primary side of the transformer H1 - H2 will be connected to the 120 volts. The secondary side of the transformer X1 - X2 will be connected to the 240 volt load. The transformer is sized by the current required by the 240 volt load.
What is the minimum voltage of US household mains supply?
240, single phase for houses208 3 phase for comerical property, can be single phase.480 volt for industrial property or 660 volts,all 60 HzUSA calls it single phase but there is actually 2 hot leads coming into the house with a natural and a ground.It is actually two 120 volt 'hots' which are 180° out of phase from each other. Voltage between either of these and ground will be 120 V. Voltage between the two hots is 240 volts. It is single phase because it is pulled off one of the phases from 3-phase, then a center tapped transformer gives the two 'opposite phases' (ground/neutral is off the center tap)In Vietnam we have 440 volts, 3 phase, 50 Hz on the poles.They bring in one hot wire and one ground. I call this single phase,It equals 220 volts in your house.
What function does the neutral serve when the supply is single phase in a wye connection?
In a single-phase circuit like a house fed from 4-wire three phase in the street, the current flows in the live and neutral wires. The neutral currents from a street of houses are expected to cancel each other so that the overall current in the neutral leaving the transformer is small.
Why is residential wiring called single phase if there are 2 phases coming in?
residential wiring are called single phase because the 2 phases coming in are one is neutral and the other is line.the neutral has a potential zero with ground and it is to provide a closed path for the current to flow through..the line is having a potential of 230V with the ground and a line together with a neutral is called a phase
Where is the neutral for 25kv ac single phase supply used for electric locomotives?
from ground
How many wires are needed for a single phase 220 volt application?
Hot and neutral, or hot and hot, plus ground. (2 + 1) 2 hots a neutral and a ground 3+1
Can neutral and ground wires be connected to the same buss bar in a service panel?
No. The sub panel is wired that same as an ordinary three wire load. The three wire is connected the sub panels terminal points as red to L1, black to L2, white to the neutral bar and the ground wire in the cable set to the ground bar. The one thing that has to be done is the bonding screw that bonds the neutral bus to the panels metallic enclosure has to be removed. The electrical code states that there is only one place that the ground is joined to the neutral bar and that is at the service entrance point into the main distribution panel.
How many wires in a single phase motor?
There should be 2 or 3 wires. A hot, a neutral and sometimes a ground.
Single phase 4 pole Gen alt w 240V 60hz output no neutral. you check from each lead to ground and get 50-70V How do you get a neutral for connecting Gen to a standard breaker box having 240V and 120V?
Neutral is at the jumper that changes it from 120v to 240v. Two stator windings are used in series to make 240v; at that junction is (when wired in Series)your neutral/common/ground. Ground this terminal and use it for your neutral/common. When wired in parallel you have 110v and the jumper is removed and there is no common/neutral and ground is from the frame of the generator.
If you need 220v 3-phase power how many wires are required coming in from the transformer or power pole and what are the voltages or potential purposes of each wire load 110v load 220v neutral ground?
In 120/208V 3 phase system you have 5 wires: three hots, one neutral, and one ground. You have 208V between any two hots and 120V between any hot and neutral. The neutral is the same as in a single phase system. Clarification: Only 4 wires maximum come from the pole - 3 phases and a neutral, and then only if the transformers are on the pole. The ground is always locally derived from a ground rod(s) and/or cold water pipe ground. Most of the time, only 3 wires come in from the pole - the 3 phases in a Delta configuration (Delta has no neutral). The neutral is then derived from a local transformer connected in a Delta-Wye setup. The neutral is the center connection in the Wye. So, from the utility feeder to the transformer - 3 wires. From the transformer (wherever it is located) to the building service entrance panel - 4 wires. The ground is connected at the service entrance panel, and from there to the rest of the building you would have all 5 wires. Clear? In the US, 208/120 is a standardized mains voltage, but in some parts of the world, the phase-to-phase voltage is 220. In that case, the phase-to-neutral potential (in a 3-phase system) would be 127 Volts, not 120.
If building is serviced with 480 volts and you put a meter between ground and hot what will be the reading?
For alternating current, and assuming the supply transformer is properly grounded, you will have 240 volts to ground. 480 volts; single phase will have Line1 and Line2, both with 240 to ground and 480 across both Lines : three phase will have Line1, Line2, and Line3, all will have 240 to ground, and 480 across any two Lines. Same is true for 240 volt service, 120 to ground and 240 across. 120 volt service is 240 volt service using ground as neutral.
How many single phase can you run on a 100amp 3 phase?
You can divide a three phase service into (3) single phase circuits providing you have a 4th neutral wire.
How many wires come in from the weather head?
If single phase - 2 wire service > two wires If single phase - 3 wire service > three wires If three phase - 3 wire service > three wires If three phase - 4 wire service > four wires US residential service is usually single phase 3 wire service: Two hots and neutral.
Is it advisable to use line to neutral power supply on a single phase residential area when the safety is concern?
line to line or line to neutral is the only way to use power line to ground if a FAULT current in the ground is a problem that needs to be corrected, an insulation fault
What is single phase 480?
The utility company can provide a 480 volt, single phase service from a single phase transformer, usually with a three wire service. 480 volts is measured between the two line conductors, and 240 volts is measured between either line conductor and the common neutral conductor. The voltage of the line conductors are at 180 degrees with respect to the neutral conductor.
