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you can get an idea by looking at the insulators
they must function in rain or snow
dew can collect on the insulator
they are made of porcelain with a glazed surface
3" diameter gives about 3" length of dew coated glaze and is safe at about 5000V
so if the insulator has 3 skirts its about 15,000V
10 skirts about 50,000V
the drops to the houses are low voltage and may be as little as 1/2 of glazed surface 600V or less
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Can you put low voltage sound wires and low voltage light wires in the same conduit?
noyou can not
Are distribution feeders overhead or underground?
High voltage above 25 kV are usually overhead feeders. Below 25 kV can be both overhead and underground. The lower voltage feeders are brought into a transformer vault that is usually located in the basement or first floor of a many storied building.
Do you have to encase rigid and PVC conduit in concrete that has high voltage wires from a transformer?
If you are talking about the primary wires to the transformer then yes they have to be encased in concrete.
Why do the people sitting in the train does not get electric shock?
If the track is fed by overhead power lines then the track is the return path for the electric current and is at earth potential.That is 0 volts In the UK we use a Third rail system which is raised up,and to one side of the rail.This rail is laid on china insulators and has a voltage of 750volt DC:- very dangerous since if you touch it it tends to clamp muscles on to it.
Measure the voltage across a voltmeter and a switch?
If the switch is closed (connected) the voltage across it will read 0V. If the switch is open (disconnected) the voltage across it could be anything, it just depends on what the voltage between the wires going into the switch is.
What is the voltage on a railway?
Overhead wires on the railways are 250v
How does the national grid brings electricity to homes?
By overhead cables, supported on masts, at very high voltage, to reduce the effects of resistance in the wires.
Why overhead transmission lines would be more economical than underground transmission lines in high voltage transmission?
Overhead wires do not require insulation, and it is easier to plant poles than dig miles of trenches.
What has the most common element used in wires?
Copper is used in electric wires because it is the best conductor of electricity that is known, apart from silver which is slightly better. For overhead wires a common material to use is aluminum because it is much lighter, although not such a good conductor. Overhead high-voltage wires usually use aluminium stranded wire with one or more steel strands in the centre to give strength.
How power supply is given to electric train?
There are two methods of delivering power to an electric train... (1) Through overhead wires. The engine has a pantograph device on the roof. this is raised until it's in contact with the overhead wires. Current travels down the pantograph, and into the engine. (2) Through a 'hot shoe' and 'third rail'. The current is fed to an extra rail running either to one side of the existing track, or 'sanwiched' between them. Again the hot-shoe delivers the current to the engine. Overhead wires are more common in cross country lines, whereas third-rail systems are more common in underground (subway) systems - where overhead space is a premium.
Is there a fluctuation of voltage in a moving train?
Yes, there is a fluctuation of voltage in a moving train
Is overhead an adverb?
Overhead can be an adverb. But it can also be an adjective or noun. Planes flying "overhead" would be an adverb. Overhead wires would be an adjective. The overhead of a business would be a noun.
Is is overhead an adverb?
Overhead can be an adverb. But it can also be an adjective or noun. Planes flying "overhead" would be an adverb. Overhead wires would be an adjective. The overhead of a business would be a noun.
Is there still current in the overhead wires that lead to a house when the house electricity is off?
Assuming there is not a "power outage" to all houses in the area (otherwise known as a "power cut") then the answer is: Yes, the potential (voltage) is still in the overhead wires that lead to a house when the house electricity is only turned off at its own main switch inside the main breaker box.
How does electric get to your home from a dam?
Along wires. Copper wires underground or aluminium overhead.
Can you put low voltage sound wires and low voltage light wires in the same conduit?
noyou can not
How do you get from Colchester train station to Gatwick Airport?
With difficulty. You will have to take the overhead train from Colchester to Liverpool Street Station, then the underground to Victoria Station and then the overhead to Gatwick.
