Cable Selection: How do I select cable when installing a soft starter?

Cable selection criteria vary according to the nature of the circuit and the location of the soft starter within the circuit.

1. Supply Cable Rating

> nominal fuse/MCCB rating
> motor FLC x 1.2

2. Inside Delta (six-wire) Motor Circuit Cable Rating
> motor FLC x 0.7

Note: Cable current ratings may need to be derated to account for installation factors (grouping, ambient temperature, single or parallel cabling etc). Always follow the manufacturer's instructions.