What are the minimum service conductor sizes for a dwelling unit?

The requirement for minimum service conductor sizes in dwelling units is crucial for ensuring that the electrical system can handle the anticipated load safely and efficiently. According to the National Electrical Code (NEC), the standard minimum service size for a residential dwelling is 100 amps. This ensures that the electrical system can adequately support the basic needs of a household, which often includes lighting, appliances, heating, and cooling.

Choosing a service conductor size of less than 100 amps may not provide sufficient capacity for modern energy usage, which is why the code specifies this minimum. It allows for future expansions or increased electrical load within the home without requiring immediate upgrades to the electrical service.

In contrast, other options mentioned do not align with NEC's guidelines for minimum conductor sizes for dwelling units. Options that suggest services smaller than 100 amps could potentially lead to overloading and safety hazards, which is why they do not meet the standard.