Final answer:
The provided references do not directly address the maximum allowed length for portable appliances but focus on electrical currents, wire forces, voltage drops, and circuit capacity for safety regulations in household appliances.
Step-by-step explanation:
The maximum length allowed for portable appliances unless specified by the appliance standard is not clearly stated in the provided references, which focus on electric current, forces between wires, voltage considerations, and circuit breaker capacities. Moreover, discussions about specific safety regulations, electrical ratings of devices, and the calculation of currents drawn by various household appliances on a 15-A, 120-V circuit are emphasized. For instance, it highlights that safety regulations limit continuous use to 80% of the circuit breaker capacity. Additionally, when calculating the current drawn by individual devices like a toaster, electric frying pan, and lamp, it offers insight into ensuring they do not exceed the limits of a typical household circuit.