What is the typical size of service entry conductors for a residential home?

The typical size of service entry conductors for a residential home at 200 amp service is 2/0 AWG. This size is commonly used because it provides adequate capacity to safely transport the electrical current required for a residential dwelling, which usually has higher power demands including appliances, heating, and air conditioning.

When sizing conductors, various factors are considered including the amount of current that will flow through the wire, the length of the run, and the permissible voltage drop. For residential services, 2/0 AWG is favored as it meets the National Electrical Code (NEC) requirements for 200 amp service while ensuring safety and efficiency.

In contrast, sizes such as 1/0 AWG for 150 amp service and 4/0 AWG for 400 amp service are appropriate but do not match the standard for a 200 amp service, while 6 AWG for 100 amp service is also on the lower side for a typical home with modern electrical needs. Hence, 2/0 AWG for 200 amp service stands out as a standard choice that balances capacity and safety effectively.