Virtual Reality (VR) is increasingly recognised as a transformative tool for safety training, particularly in high-risk fields such as construction and electrical engineering. However, to successfully integrate this technology within established training practices, training outcomes ought to be rigorously validated. By investigating the effects of eXtended Reality (XR) technology upon the delivery of safety training for high-voltage operations, this paper proposes guidelines by which instructor adoption of XR tools may be assessed and seeks to establish a methodology to measure the effectiveness of training delivery. Factors influencing instructor adoption of XR tools and methods by which staff may be prepared to integrate new training methods are discussed. An exploration of relevant performance metrics, including trainee immersion and operational accuracy, informs the design of an experiment to compare the outcomes of different training sequences: participants are allocated into four experimental groups: (1) traditional training only, (2) VR training only, (3) traditional training followed by VR, and (4) VR training followed by traditional training. Immersive Tendencies Questionnaires (ITQs) assess trainee predispositions to immersion and Presence Questionnaires (PQs) assess perceived presence within the VTE. As well as detailing the collection of data, the experiment desgin also proposes statistical analyses to determine whether VR training complements traditional methods, enhances participant confidence, and improves knowledge retention.