Quote Durham Giant="Durham Giant"originally called the , " WIREPULLERS", not sure when it was abbreviated but deffo after 1950'"
More specifically, back in the days when the sport was part time and the players were working 'hard' jobs locally, wire pulling was a major (the main?) industry in the town, thus, it would be a safe bet that the majority of the players were full time wire pullers playing Rugby in their spare time.
I don't think we'll ever get team nicknames based on local industry ever again. Could you imagine it? every team would end up being called "the phone monkeys", given that call centres is all we seem to have anymore!