Skip to content
ElectraKit
Open menu

What Size Wire for 50 Amps at 150 Feet?

At 150 ft, the default 50 A result lands on 4 AWG copper or 3 AWG aluminum, with voltage drop governing and the two materials moving through different distance steps.
Load
50 A
Distance
150 ft
Band
Mid branch / light feeder
Defaults
Non-continuous, 75 C lugs, 86 F, 240 V single-phase

Computed Starting Point

Ampacity and voltage drop under common defaults for this amp and distance.

MaterialComputed sizeOCPDUsable ampacityGoverning constraintDefault check
Copper4 AWG50 A85 AVoltage dropPasses defaults
Aluminum3 AWG50 A75 AVoltage dropPasses defaults
What Size Wire for 50 Amps at 150 Feet? under common non-continuous defaults: THHN or XHHW-2 insulation, 75 C terminations, 86 F ambient, 240 V single-phase and no more than three current-carrying conductors.

What 150 ft ChangesAt 150 ft, both materials are voltage-drop governed, but the neighboring pages do not move together. This page is the midpoint where copper has made its next jump while aluminum still has another published jump ahead at 200 ft.

Run the wire size calculatorCheck voltage drop alone

Zero-Length vs This Distance

If the distance-adjusted size is larger, voltage drop governed under these defaults.

CaseCopper sizeCopper constraintAluminum sizeAluminum constraint
Ampacity only (0 ft)8 AWGTermination rated 75 C6 AWGTermination rated 75 C
150 ft (this page)4 AWGVoltage drop3 AWGVoltage drop
Copper and aluminum sizes for 50 A with no distance entered versus 150 ft one-way.

Adjacent Distances at This Amp

Neighboring published lengths for 50 A under the same defaults.

DistanceCopper sizeAluminum sizeCopper constraint
100 ft6 AWG4 AWGVoltage drop
150 ft (this page)4 AWG3 AWGVoltage drop
200 ft4 AWG2 AWGVoltage drop
50 A copper and aluminum starting sizes across neighboring distance pages.

150 ft Is the 50 A Middle Transition

Mid branch / light feeder context for 50 A at 150 ft.

A 150 ft 50 A run is the kind of measured path that shows up after adding risers, sweeps, garage offsets, EVSE placement, or a small shop feeder route. It is not just a rounded-up 100 ft query.

Under the defaults, copper jumps from 6 AWG at 100 ft to 4 AWG here, then stays 4 AWG at 200 ft. Aluminum steps differently: 4 AWG at 100 ft, 3 AWG here, and 2 AWG at 200 ft.

What Changes This Long-Run Answer

Checks that matter for distance-governed sizing in this amp band.

  • Compare all three 50 A pages

    100 ft, 150 ft and 200 ft do not share the same material pattern. Use the measured route before choosing a conductor.

  • Use actual operating current

    A configured EVSE or equipment load below 50 A can change the voltage-drop result. Do not size from the breaker handle when the sustained load is lower.

  • Keep 120 V separate

    These defaults assume 240 V. The same 50 A at 120 V has a different voltage-drop problem and should be rerun.

  • Check terminations after upsizing

    The larger conductor is only useful if the receptacle, disconnect, panel or feeder equipment accepts the chosen material and size.

50 A at 150 ft FAQs

What size wire for 50 amps at 150 feet?
Under the defaults on this page, start with 4 AWG copper or 3 AWG aluminum. Voltage drop governs both results.
Why does 150 ft jump from the 100 ft answer?
The 100 ft page lands on 6 AWG copper or 4 AWG aluminum. At 150 ft, the default voltage-drop check moves to 4 AWG copper and 3 AWG aluminum.
Why does copper stay the same at 200 ft while aluminum changes?
Under these defaults, 4 AWG copper still clears the 200 ft page, while aluminum moves from 3 AWG at 150 ft to 2 AWG at 200 ft.
Is 150 ft one-way or round-trip distance?
Use the one-way conductor path on this page and in the calculator. The voltage-drop calculation accounts for the circuit path internally.