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Updated: Aug 19, 2026

Mechanical Expansion of Steel Tubing as a Solution to Leaky Wellbores
Published on: November 20, 2014
Ensuring reliability in expansion schemes
Abu Sayed Kamal-Uddin1, Donald Leigh Williams
1Engineering Consultancy Services, ERA Technology Ltd.
Abstract:
Existing electricity power supplies must serve, or be adapted to serve, the expansion of hospital buildings. With the existing power supply assets of many hospitals being up to 20 years old, assessing the security and reliability of the power system must be given appropriate priority to avoid unplanned outages due to overloads and equipment failures. It is imperative that adequate contingency is planned for essential and non-essential electricity circuits. This article describes the methodology undertaken, and the subsequent recommendations that were made, when evaluating the security and reliability of electricity power supplies to a number of major London hospitals. The methodology described aligns with the latest issue of NHS Estates HTM 2011 'Primary Electrical Infrastructure Emergency Electrical Services Design Guidance' (to which ERA Technology has contributed).
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