Method for controlling electric current in a tether cable of an electrically driven mining vehicle, the method comprising: - determining an indicator of an equivalent cycle current that flows through said tether cable, wherein the equivalent cycle current is an amperage value that tells, which constant amount of continuous electric current would cause the same loading of the tether cable as the actual current, characterized in that the method further comprises - obtaining one or more descriptors of an actual state of dynamically changing conditions of the tether cable, - determining a current limiting value on the basis of said indicator and said descriptors, and - limiting a total amount of current that said mining vehicle draws through said tether cable to a value smaller than or equal to said determined current limiting value, wherein - said indicator of an equivalent cycle current comprises an indicator of future equivalent cycle current that is expected to flow through said tether cable during a future duration of time, and - the method further comprises - obtaining an indicator of a driving speed of the mining vehicle, - calculating the indicator of the future equivalent cycle current at least partly on the basis of the obtained indicator of the driving speed, and - responding to a momentary demand of electric power within the mining vehicle that is larger than allowed by the determined current limiting value, by temporarily boosting the amount of electric energy available on an onboard power link of the mining vehicle with electric energy drawn from a battery onboard the mining vehicle. - determining an indicator of an equivalent cycle current that flows through said tether cable, wherein the equivalent cycle current is an amperage value that tells, which constant amount of continuous electric current would cause the same loading of the tether cable as the actual current, - obtaining one or more descriptors of an actual state of dynamically changing conditions of the tether cable, - determining a current limiting value on the basis of said indicator and said descriptors, and - limiting a total amount of current that said mining vehicle draws through said tether cable to a value smaller than or equal to said determined current limiting value, - said indicator of an equivalent cycle current comprises an indicator of future equivalent cycle current that is expected to flow through said tether cable during a future duration of time, and - the method further comprises - obtaining an indicator of a driving speed of the mining vehicle, - calculating the indicator of the future equivalent cycle current at least partly on the basis of the obtained indicator of the driving speed, and - responding to a momentary demand of electric power within the mining vehicle that is larger than allowed by the determined current limiting value, by temporarily boosting the amount of electric energy available on an onboard power link of the mining vehicle with electric energy drawn from a battery onboard the mining vehicle. - obtaining an indicator of a driving speed of the mining vehicle, - calculating the indicator of the future equivalent cycle current at least partly on the basis of the obtained indicator of the driving speed, and - responding to a momentary demand of electric power within the mining vehicle that is larger than allowed by the determined current limiting value, by temporarily boosting the amount of electric energy available on an onboard power link of the mining vehicle with electric energy drawn from a battery onboard the mining vehicle.