Cable design limitations
In order to assist the user, we are limiting some cable configurations that do not conform to the standards or common practice.
Posted on October 17, 2019
With the next update of Cableizer, we improve the user assistance when designing cables in the cable editor (link requires login) by limiting some configurations that are not feasible or do not exist in reality.
- Old high-voltage oil-impregnated and medium-voltage mass-impregnated cables can have a screen, typically a tape screen, around each phase and a common lead sheath. Therefore, oil- and mass-impregnated cables in Cableizer are required to have a lead sheath.
- Modern multi-core medium-/high-voltage cables (i.e. not oil- or mass impregnated cables) have never a common sheath.
- Multi-core low voltage cables (with a rated line-to-line voltage smaller or equal to 3 kV) either have separate screens or a common srceen, or a common sheath, but never both. They cannot have separate sheaths either.
- Multi-core medium-/high-voltage cables (with a rated line-to-line voltage larger than 3 kV) cannot have a common screen.
- Old pipe-type cables are not possible to design in Cableizer.
With these limitations, we ensure that the applicable equations for the ampacity calculation are relevant for all cable designs and we consciously limit certain unusual cable configurations that do not conform to the standards or common practice.