Length of lay of conductor strands

Typically, stranded conductors comprise multiple layers of strands, which all have a different lay diameter and also typically have different lengths of lay. Note that also the direction of lay may change from layer to layer. A direct calculation of the electrical resistance of a stranded conductor thus becomes involved and requires information that is normally not available for the user calculating the current rating.

Symbol

$L_{lay,c}$

Unit

Used in

$F_{lay,c}$

Effective length per unit lay length of conductor strands