Okay, I'll help you with a calculation using #10 THHN. To give you the most useful calculation, I need to know what you're trying to calculate. Please tell me what you're trying to determine with #10 THHN.

For example, are you trying to figure out: Ampacity

How much current can #10 THHN safely carry?

Voltage Drop

How much voltage will drop over a certain length of #10 THHN carrying a specific load?

Conduit Fill

How many #10 THHN wires can fit in a specific size conduit?

Fault Current

What is the let through current for #10 THHN in the event of a short circuit?Once I know what you're trying to calculate, I can provide the relevant NEC references and formulas.

In the meantime, here are some basic things to remember about #10 THHN



Ampacity (General)

#10 THHN has a base ampacity of

30 amps per NEC Table 310.16 (for conductors insulated at 90 degrees C and terminated to equipment rated for 75 degree C, which is typical). However, there are important adjustments and corrections you'll need to apply depending on the installation!

Voltage Drop

Voltage drop is very dependent on the length of the run, the current being carried, and the voltage of the system.*

Wet Locations

THHN is rated for wet, dry, and damp locations.

Once you provide the details of your scenario, I will calculate. Flag for review