Junction Box component has two options, 3Ph + N and 1Ph + N. If the user tries to insert a junction box immediately after a three-phase source, then, only the three-phase option will be available to select, otherwise both options are selectable.




A Junction Box is similar to a Switch Board component and acts the same, however, there is a slight difference on the Circuit edit tab where the Load section is not available. Load of a junction box is defined by the connected circuits automatically and cannot be predefined.


A junction box can also be defined as an Unknown network point. If this box is selected, user will be required to define a prospective fault current and an external impedance value, so, ElectricalOM will use this data and assume the origin is the junction box rather than anything upstream.



Multiple Sources feature is also applicable for Junction Boxes, refer to this section for more information about multiple sources.