British Railways BR29988: Extracts from Working Instructions for AC Electrified Lines (1967) was an official operational booklet issued to staff working on 25 kV AC electrified routes. It set out essential instructions for the safe and efficient operation of electric traction and infrastructure. Topics included isolation procedures, earthing, signalling arrangements, emergency actions, and staff responsibilities when working near live overhead equipment. The booklet reflected the rapid expansion of AC electrification during the 1960s and emphasised strict safety discipline. BR29988 helped ensure consistent working practices across newly electrified regions, reducing risk to staff while supporting reliable modern railway operations.
