Final answer:
The primary distribution voltage systems available in the United States and Canada include three-phase, four-wire systems with voltages of 120/208 volts and 277/480 volts.
Step-by-step explanation:
In the United States and Canada, the distribution voltage systems predominantly revolve around three-phase, four-wire systems. These systems feature voltages commonly set at 120/208 volts and 277/480 volts. The 120/208-volt system is extensively used in residential and light commercial settings, providing power for smaller appliances and equipment.
On the other hand, the 277/480-volt system serves larger commercial and industrial applications due to its higher voltage capacity, enabling the operation of heavier machinery and equipment. These systems ensure a balanced distribution of power, especially in commercial and industrial areas, catering to diverse energy needs. The standardization of these voltages allows for the efficient provision of electricity across various sectors, accommodating the demands of different scales of operations.