This paper investigates secondary school pupils’ everyday knowledge of the dangers of electricity. It is based on classroom research by a team of teacher‐researchers working with a total of 241 11‐12 and 13‐14 year olds in English comprehensive schools. The initial data were collected by written questionnaires which probed the general meanings pupils had for electricity. When the responses were analyzed, there was a surprisingly high proportion of children (61% of the 11‐12 year olds and 35% of the 13‐14 year olds) who mentioned danger. The pupils were then divided into ‘fearers’ and ‘non‐fearers’, and group interviews were carried out with both in order to explore features of pupil thinking and influences on it. Results of these interviews include pupil quotations around themes such as personal experiences of electric shocks, excitement, the home, socially‐available knowledge and learning about electricity at school. Questions are raised about the possible effect of fear on motivation, participation in practical work and conceptual learning in general; and it is suggested that the pupils’ ideas should be acknowledged and addressed within a supportive classroom environment.