do I need new bus wires


I am using a lenz 100 on a 18*8 layout,main line & branch.I have a
spare lenz Compact+transformer I would like to use the compact to power
my branch line,which has 1 rail connection with the main line all ready
fitted with insulated rail joiners. Do I need to fit new bus wires and
feeds for the branch,and will trains pass branch to main line on the
same throttle. Any information would be appreciated.

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