Consumers should use ISI marked electrical appliance is an example of
Right to safety
The consumer has a right to be protected or right to safety against goods and services which are hazardous to life and health.
For instance, electrical appliances which are manufactured with substandard products or do not conform to the safety norms might cause serious injury.
Thus, consumers are educated that they should use electrical appliances which are ISI marked as this would be an assurance of such products meeting quality specifications.