0
Household wires and electricity flexes are covered in plastic so that you do not touch the metal core by accident as it carries the electricity.
But the overhead lines carried by pylons and in substations are not insulated at all as any way they are out of reach and insulating them adds up unnecessary costs. Pylons have ceramic or glass insulators to support the overhead lines so that electricity is kept away from the pylon itself.
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoThere are many plastic wires, including laundry lines, fishing lines, and lawnmower lines (for hand lawnmowers).
For many purposes lines are not made out of plastic, because plastic stretches more than rope.
Sihath Nenuja
Because then the plastic may burn
Luciano Teh
So they can save money
Add your answer:
Earn +20 pts
What are pylons used for?
can pylons have an effect on the TV proformance
Why are the cables attached to the pylons with the glass connectors rather than metal ones?
Glass is an insulator and will not allow a current to flow through it. With metal, which conducts electricity, the current would flow through them to the towers and cause short circuits,
What does power lines do in energy?
Power lines are used to move electrical energy from one place to another. In a simple system the power lines would connect a generator to a set of customers. For large amounts of energy thick overhead cables are used, supported by pylons. The largest pylon circuits can carry enough power to supply over a million homes.
What are 3 examples of an insulator?
Insulators of electricity: A person wearing rubber boots stepping on an exposed wire without getting electrocuted. Insulators of heat: A styrofoam cup containing hot water. It does not heat up or burn your hand a lot. In fact, it is so minimal that you hardly notice it.
What is a measure of a waves energy?
the amplitude of a wave shows how much energy it has eg, a smaller voltage ac supply on an oscilloscope would be much smaller than say a higher voltage such as main electrical pylons. if you mean waves at sea then i would presume it would have to be measured in joules as this the standard SI unit for energy.
What is a pylon cable?
pylons are made of steel as it is a strong metal but cables themselves are copper. ps this is a terribe website
How is ac supplied all over the UK?
By electricity pylons and cables
When electricians hang new power lines on a hot day they must not hang them too tight why?
If hung in hot weather, the cables will be in an expanded state and longer in length. Due to contraction of the cables in following cold weather, the cables will become shorter and could damage the connections on the poles or pylons. The loop between poles and pylons take this expansion and contraction of cable length into account.
What tower supports a bridge cable?
In a standard suspension bridge the cables are supported by a Bridge Pylon or series of bridge pylons. The cables are supported upon these pylons and they serve to reduce the tension forces that would be required at the cable anchorages had the cables simply been installed straight across the bridge span.
What type of electrical current is found in the wires between pylons?
It is alternating current (AC) that is transmitted between electrical pylons.
What is a cable-stayed bridge?
A cable-stayed bridge is one where the deck is 'held up' by steel tensile cables which fan out from the bridge pylons or towers.
How does a bridge stay together?
The towers are built first. Steel ropes are suspended from the towers. Special machines spin these into strong steel cables. Next, long steel cables called hangers are attached to the suspending bridge. Sections of the deck are lifted into place and fixed to the hangers.
What are pylons used for?
can pylons have an effect on the TV proformance
What is the purpose of cosh?
cosh is a hyperbolic function. It describes a catenary, the shape formed by a chain that is suspended only at its ends and is acted on by the force of gravity. The name catenary derives from Latin caten = chain. Another typical example is electric cables between pylons.
Do heavy storms cause powercuts?
Heavy storms, ice and snow, often cause powercuts, bringing down cables, poles and, in extreme winter weather, causing the collapse of pylons.
When was Pylons - Web framework - created?
Pylons - Web framework - was created in 2005.
How many pylons are there in the national grid?
In the National Grid there are 876 thousand pylons.
