Wiring

Wiring determines how much current you can safely carry and how much voltage you lose. Learn wiring basics, cable cross-section and wire types.

Wiring may look straightforward, but in residential design it’s where many decisions “freeze”:

• which cable you choose (type, build, construction),
• which cable cross-section you set,
• and how that impacts voltage drop and your protection choices.

Wiring: layout & principles

Think of wiring as the physical “route” between the board and the load:

• the run length drives your voltage drop,
• the cable cross-section drives how much current the cable can safely carry,
• and the cable type/construction influences how well it survives the installation environment (embedded, in conduits, grouped in a cabinet, etc.).

Cable cross-section (mm²): the practical meaning

The cable cross-section is the size of the copper conductor in mm².

In general:

• bigger section ⇒ higher allowable current,
• bigger section ⇒ usually less voltage drop,
• but it’s also thicker and more expensive.

Wire types and insulation

Wire types are often combinations of:

• single-core or multi-core conductors,
• insulation material (e.g. PVC and variants),
• and the installation method (in conduit, inside a distribution cabinet, in open air, …).

In Condui these choices translate into the fields you enter per cable, so validation rules can match what you intended on the plan and in the real installation.