Overload protection

In the case of a single load that is very unlikely to produce an overload, then it is permitted to size the cable according to the load, provided that the cable is still protected against short circuit. 

Examples of such loads include electric motors with a thermal overload trip, or simple resistance heaters. 

In the case of multiple loads that are unlikely to draw excess current, then in my view this is permitted but poor practice. Four loads each limited to 6 amps are in my view permitted on a cable rated at 24 amps. Poor practice in my view because the load might be more liable to increase than with a single load. (Yea mate, the supply is 32 amps so no problem in adding a 5th motor)

In most cases i consider it simpler, safer and better practice to either upsize the cable or downsixe the OCPD.

In such a case I dont consider the length to be directly relevant.

In the case of a single load that is very unlikely to produce an overload, then it is permitted to size the cable according to the load, provided that the cable is still protected against short circuit. 

Examples of such loads include electric motors with a thermal overload trip, or simple resistance heaters. 

In the case of multiple loads that are unlikely to draw excess current, then in my view this is permitted but poor practice. Four loads each limited to 6 amps are in my view permitted on a cable rated at 24 amps. Poor practice in my view because the load might be more liable to increase than with a single load. (Yea mate, the supply is 32 amps so no problem in adding a 5th motor)

In most cases i consider it simpler, safer and better practice to either upsize the cable or downsixe the OCPD.

In such a case I dont consider the length to be directly relevant.