AB Ventures Limited v Siemens Limited

AB Ventures Limited concluded a construction contract with Lumwana Mining Company Limited to build the Lumwana Copper Mine in Zambia. A joint venture between Ausenco Americas LLC and Bateman International Projects BV was responsible for supplying specialised electrical drives for the project and contracted Siemens Limited to design, manufacture, supply and commission those drives. After installation and commissioning by Siemens, the drives malfunctioned, causing transformer failures and delays to completion of the project. As a result, AB Ventures became liable to Lumwana for contractual penalties or damages for delay and incurred additional expenses. AB Ventures sued Siemens in delict for pure economic loss, alleging that the malfunction and consequent loss were caused by Siemens’ negligence. Siemens raised an exception, arguing that the particulars of claim disclosed no cause of action because the alleged negligent conduct was not wrongful in delict.

The appeal was dismissed with costs, including the costs of two counsel.

The case is a leading authority on the limits of delictual liability for pure economic loss in South African law, particularly in the context of complex commercial and construction contracts. It reaffirms that courts will be slow to extend Aquilian liability where parties could have protected themselves through contractual mechanisms, and it underscores the continued importance of policy considerations and contractual risk allocation in determining wrongfulness.