200 amp copper dwelling service
Common copper planning lookup.
2/0 AWG copper dwelling serviceCommon 200 amp conductor200 amp service wire size
200 Amp Service Wire Size
A common 200 amp dwelling service planning lookup is 2/0 copper or 4/0 aluminum, but utility and local rules can differ.
Inputs
Results
Immediate estimateCommon 200 amp conductor2/0 AWG copper dwelling serviceLimited U.S. dwelling service planning lookup; utility and local service rules can differ.
Circuit or service rating200 A
MaterialCopper
Run length75 ft
Voltage dropNot estimated
Acknowledge the limitations before relying on this as a planning lookup.
Electrical sizing depends on the adopted NEC edition, terminal temperature ratings, insulation type, conductor material, conduit fill, derating, grounding, equipment labels, and local inspection requirements.
Diagram
200 amp service
A dwelling service rating and conductor material select a limited planning row.
- 200 A service
- Material
- Run length
How this calculator works
Select conductor material and run length for a cautious 200 amp dwelling service planning lookup.
Service scope
The page targets dwelling service entrance planning rather than a generic branch circuit.
Length flag
Longer service runs are flagged for voltage-drop review.
Local review
Service load calculation, meter/main equipment, grounding electrode conductors, and utility standards are outside the calculator.
Lookup
match amp rating and conductor material to a common residential planning rowLength flag
flag one-way runs over 100 ft for voltage-drop reviewAssumptions
- Lookup scope: Limited U.S. dwelling service planning lookup; utility and local service rules can differ.
- Not checked: Voltage drop, grounding conductor size, neutral load, service load calculation, conduit fill, ambient temperature correction, bundling, and equipment-specific requirements.
Worked examples
Long aluminum run
Shows voltage-drop caution.
4/0 AWG aluminum dwelling serviceCommon 200 amp conductorFAQ
Is 4/0 aluminum always used for 200 amp service?
It is common for dwelling service planning, but the actual installation must match code, utility, and equipment rules.
Does this size the ground?
No. Grounding and bonding are separate.
Does this include meter base requirements?
No. Meter and utility requirements must be checked locally.
Sources and review
- National Electrical Code, NFPA. Accessed 2026-07-16.
- Calculators, Southwire. Accessed 2026-07-20.
Reviewed 2026-07-20. Planning estimates only; confirm project-specific requirements.