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Hi Jingling,
If you're planning to go DCC it is always better to install a power bus, with every length of rail connected to the bus rather than relying on the metal track connectors and point blades to carry the current. Connectors will move slightly with the expansion and contraction of the track/boards and eventually this will cause a resistance to build up within the rail connector and lead to unreliable running.
With every piece of track and points directly connected to the power bus you will be sure that power is reaching every section of track which is one less thing to cause running/reliability problems.
Hope this helps,
Happy modelling,
Expat.
If you're planning to go DCC it is always better to install a power bus, with every length of rail connected to the bus rather than relying on the metal track connectors and point blades to carry the current. Connectors will move slightly with the expansion and contraction of the track/boards and eventually this will cause a resistance to build up within the rail connector and lead to unreliable running.
With every piece of track and points directly connected to the power bus you will be sure that power is reaching every section of track which is one less thing to cause running/reliability problems.
Hope this helps,
Happy modelling,
Expat.
