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It is potentially dangerous because it provides a low-resistance path across the supply voltage. That causes excessive current to flow, and if all is well a fuse or circuit-breaker will operate to shut off the supply. Without that there might be enough current to cause a fire.
Wiki User
∙ 10y ago
Wiki User
∙ 14y agoBasically it is the amps that kill you. At the main you basically have all the amps you need to kill yourself and the higher currents can cause arcing and lots of heat that can start fires. A short circuit basically tries to draw all available current from the source to ground. Think about a lightening bolt which is in effect causing lots of current to flow between the clouds and the earth. This is in effect a short circuit of sorts.
Wiki User
∙ 9y agoA short circuit is when there is a connection between both sides of the supply before the current is sent round the main circuit.
It causes large currents to flow and if it causes the fuse to blow or the circuit breaker to trip, that isn't dangerous, just inconvenient.
In a poorly installed circuit without protection devices, the large current could cause the wiring and the house to catch fire.
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What is the purpose of using transformer in electric bell circuit?
To supply the bell, because the latter has a rated voltage that's lower than the mains.
What is a ring circuit?
Usually,there are many mains sockets in a flat to provide electricity for electrical appliances.Do you know how these mains sockets are connected to the electric cable that carries electricity to the flat? The electric cable that carries electricity to a flat is connected to the consumer unit.In the consumer unit,the electric cable branches into a number of parallel circuits that deliver electricity to ceiling lamps,mains sockets,air conditioners(or other appliances with high working current),etc.The circuit that delivers electricity to main sockets exists in form of a ring and is therefore called a ring circuit. The ring circuit provides two paths for electric current to flow from the consumer unit to the mmain sockets.Each path only carries half of the electric current.Therefore,the chance of overloading the circuit is reduced.Besides,if one of the paths is damaged,there's still another path for carrying electric current.
Is 300 volts dangerous?
If the person working on a circuit is unqualified, any voltage is dangerous! If you have not been properly trained, stay away!
How does AMF panel for generator work?
AMF stand for Auto Mains Failure. Generally a generator/alternator power and normal commercial line switching over is done through it. A normal changeover, if mains fails you have switch the load circuit to generator, and when mains restors, generator supply will be cut off and fed to mains. in AMF this done by contactors and control circuits. if you want to know more......
What is service mains in power transmission system?
A 'service mains' is not associated with an electricity 'transmission' system, but with a low-voltage 'distribution' system. The service mains is the name given to the cable that connects a building to the low-voltage mains supply.
Where in the circuit do you insert the switch?
i assume main switch in that case at the mains input.
Why are there 3 pins to the plug?
Because the mains supply has three wires. The Live wire (brown) is the power from the mains. The Neutral (blue) is the return to the mains (completing the circuit). The Earth (green/yellow stripe) - is the 'safety trip'.
Is a light switch in a home a circuit?
yes because its connected to the mains electricity which is energy(i think)
Why is mains electricity dangerous?
because your body is controlled by electric impulses that are far weaker. Mains power can knock your bodys signals out, causing your heart to stop pumping.
A dead battery break a circuit?
For it to meaningfully to be a circuit, electrons must flow round the complete circuit. Thus a source of energy is needed, be it a battery, or the mains electricity.
What is the purpose of a thermal fuse?
To break the circuit if the temperature of it exceeds the rated current. Used in mains frequency transformers to disconnect it from the mains if it gets above a certain temperature to prevent it from catching fire.
What is a domestic electrical supply in which outlet sockets connect to the mains supply through a continuous circuit?
Ring main
What has the author Bo Spanner written?
Bo Spanner has written: 'Circuit on the mains' -- subject(s): English poetry
Can you use a 300 watt 220-240 watts halogen bulb on 240 watt mains?
Nobody has "240 watt mains". Perhaps you meant "240-volt mains".You would need to have a lighting or receptacle branch circuit, with over-current protection, in order to use any halogen bulb.However, if you have a 300 W bulb, it should work nicely in a 15-A or 20-A branch circuit.
Why is it dangerous to exprriment with mains electricity or large batteries?
Touching bare, live, contacts, connected to mains electricity will give you a nasty shock which could be fatal. Your house circuits have protection using circuit breakers, fuses and RCDs.Large batteries have the capacity to deliver very large currents if shorted out, which can cause fires and may explode, showering acid and/or chemicals all over the place.
Which wire is the most dangerous in a plug?
The Active wire is always either Red (in a 3 core Red, Black and Green cable) or Brown (in a 3 core Brown, Blue and Green/Yellow cable). You can also be electrocuted by the neutral (Black or Blue) wire if the active is still supplying current through a device. The only truly safe way to handle mains wiring is to completely isolate the circuit at the fuse board.
It is dangerous to do a lab expriment?
Depends entirely on what the experiment is. Anything with mains electricity and acids is likely to be dangerous while something performed with light and lenses is likely to be perfectly safe.
