11th Sep '25

The National Grid

Electricity is transferred from power stations to consumers along the . It is done at a high to improve the efficiency of transmission.

The step up transformer increases the voltage (potential difference), which reduces while providing the same amount of power.

As we know current has a heating effect, reducing the reduces the effect and hence reduces losses in the cables.

The step down transformer decrease the to a safer level and increases the to provide the power.


Health Concerns
Do overhead power lines pose a safety risk?
Living too close to overhead power lines could increase the risk of childhood leukaemia according to a major study.

Read the evidence and make up your own mind.