How many volts in a train track?

Question

^^^

Answer 1

If your talking about those big *** trains that you see outside, then they don't have a potential in them.

If you're talking about subways/metros, a **** load.

Answer 2

To many to sustain life. Don't touch.

Answer 3

In the southeast the 3rd rail has 750volts in it.

Else where ithen there will be about 12volts which is used as a part of the track circuits so the signaller knows where the train is.

But if you are nether sure always class it as live and do not go near it unless you know what you are doing.

Answer 4

London's Underground system uses a 4-rail system in which the centre rail is -400V DC (negative with respect to earth), and the outermost rail is 200V DC - this gives a total 600V DC potential.

On some lines, one of the running rails also carries an AC voltage around 50V AC depending on proximity to the local substation, which is used as part of the signalling system - the train's axles short that voltage to the other, earthed, running rail and cause relays to drop out.

Always assume that EVERY rail is live... and stay away from them wherever possible.

Answer 5

Most railways dont have any electricity flowing through them...not to power the trains anyway.

Electricity for train traction is obtained from either a seperate power rail.(3rd rail traction). or from overhead wires(catenery).

Any power in the running rails on these sytems is the return earth current.

Where the presence of trains is detected by track circuits in a signalbox...the current is as low as 24 volts through one rail,which when a train is on each section of isolated rail is shortcircuited via the trains wheels and opens a relay switch in the signalbox and lights a lamp on a diagram showing where the train is.

But remember...just because theres no real energy in the rails...dont make it a safe place to walk!

Answer 6

from what i have heard they are full of faults

Answer 7

In a train track about 3 volts to operate the signal warning system. In the 3rd Rail (raised DC rail in the South East and Underground) this can vary from 850 to 650 volts depending on location.

Dont forget its DC (Direct Current) so all objects that earth themselves are attracted to the current and are not repulsed by it.

Answer 8

Thumper: Not quite. The London Underground does use a four-rail system but the voltages are DC+420v on the positive outer rail and DC-210v in the inner negative rail, giving a total voltage of DC 630v. Again, the running rails have a low voltage flowing through them, usually about 9v to 10v, to work the signalling circuits.

Answer 9

enough to kill you and that should really be the end of that.

may i ask why you want to know? It seems a strange question and hopefully you have asked for research purposes.

Answer 10

On the third rail of the Long Island Railroad and the New York City subways, there is 650 volts.

The amperage runs around 3,000 to 4,000 amps.

Overhead wires are called "Catenary", and in New Jersey, there are two lines, one has 11,000 volts (NorthEast Corridor) and the other has 25,000 volts (Morris and Essex Line).

Trolley's and light rail vehicles have catenary wires, but run at 650 to 750 volts.

The two running rails are grounded, in all cases, so the only risk of a shock or electrocution is if you touch the *third* rail, or climb on top of the train and touch the overhead wire.

Signals operate on 48 volt transformers, so they can't give you a shock(on diesel lines).

Answer 11

The Third Rail system used in the South of England to provide traction DC current for Electric Trains is a nominal 650 - 750 Volts DC.

The Overhead system (OHLE) opperates at 25Kv