Abstract
In this article I examine the practices of electrical engineering experts, with special reference to their role in the implementation of innovations in late Victorian electrical networks. I focus on the consulting work of two leading figures in the scientific and engineering world of the period, Alexander Kennedy and William Preece. Both were Fellows of the Royal Society and both developed large-scale consulting activities in the emerging electrical industry of light and power. At the core of the study I place the issues of trust and authority, and the bearing of these on the engineering expertise of consultants in late Victorian Britain. I argue that the ascription of expertise to these engineers and the trust placed in their advice were products of power relations on the local scale. The study seeks to unravel both the technical and the social reasons for authoritative patterns of consulting expertise.