Class 2 Voltage Drop Calculator (24V)
My low-voltage run drops too much — what do I do?
Size up the conductor or raise the supply voltage. When a run fails your tolerance, the calculator suggests the next larger AWG that would pass, drawing from its small-gauge circular-mil table (22 through 14 AWG). Long thermostat, sensor, and access-control runs on 22 to 18 AWG are the usual culprits.
Run the numbers for your project
Use the Class 2 Voltage Drop Calculator (24V) to get an exact answer for your inputs.
Open the calculatorRelated questions
Pro launch updates
Get notified when Pro launches, plus a monthly code-change digest. Email only — no account required.