By Miles Nicholson
On mains wiring, you may have your phase connections wired directly to the busbars.
- Create a unique wire type called BUSBAR or more specifically the busbar size e.g. 20x6_CU. This will be reported in the wire from-to list.
The busbars could either be numbered by phase e.g. L1, L2, L3, N etc or could be unnumbered. If they are unnumbered, you can create a New Wire Numbering Group.
A terminal symbol may be used to represent the connection to the busbar. This can be given its own unique identifier so that it can be filtered out if necessary when producing the terminal strips, but it can be useful to determine the amount of connections that are required (per phase or total) and help therefore in balancing the phases.
Instead of the connection dots, we can either:
- Use a disconnectable terminal if we want different wire numbers for the wires in comparison with the busbars
- Use a passing terminal if we want the wire number to be continued throughout the connections
- Use a terminal which has both disconnectable (if we want a different wire number on the phase drop ) and passing connections (busbar) - see image below.
- Use a hyper passing circuit. A hyper passing circuit is a circuit where you wish to have the same equipotential wire number on 2 or more different circuits using components that are linked, have an identical circuit and connection point data e.g. a busbar distribution block split into segments.
We can change an existing wire type by right-clicking over a wire and selecting Wire Style >
E.g. Picture depicts 3: