From approximately 1888, the widespread adoption of alternating current (AC) power systems revolutionised the distribution of electricity. By enabling the efficient transmission of power over significantly longer distances than previously possible, this technology overcame the geographical limitations that had constrained earlier direct current networks. This breakthrough was fundamental in transforming electricity from a localised curiosity into a reliable, large-scale utility capable of powering entire regions.

The implementation of AC networks facilitated the development of central power stations, which could be situated further away from the end users they served. This structural shift allowed for a more consistent and scalable supply of energy to meet the growing demands of the late nineteenth century. As these systems matured, they became the backbone of the modern electrical age, providing the essential infrastructure required to support the rapid expansion of urban centres, industrial facilities, and private homes.

The transition to alternating current was driven by several key technical and practical advantages that reshaped the landscape of public utility:

• The ability to use transformers to step up voltage for efficient long-distance transmission.
• A reduction in energy loss during the transport of electricity across vast networks.
• The capacity to step down voltage safely for domestic and industrial consumption.
• The centralisation of power generation to improve overall grid reliability.
• The standardisation of supply, which encouraged widespread adoption across towns and cities.

By establishing a robust framework for energy delivery, the expansion of AC systems laid the groundwork for the electrification of society. This period of innovation ensured that electricity could be integrated into the fabric of daily life, ultimately powering the machinery of industry and the comforts of the modern household on an unprecedented scale.