Brendan <nadnerb_2000@NOSPAM.com.au> wrote in message 01bf6b1d$6cad8d00$c34265cb@nadnerb2000">news:01bf6b1d$6cad8d00$c34265cb@nadnerb2000... > I imagine it is for better electrical contact. True, if one contact wire breaks at least the train can still move:-) > > Brendan