What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

325 inches-pounds

Explanation:

Tightening technique guide suggests that;

4/0 kcmil ---requires---→250 in-pounds tightening torque with 500 split-bolt

250kcmil ---requires---→325 in-pounds tightening torque with 650 split-bolt

300kcmil ---requires---→325 in-pounds tightening torque with 650 split-bolt

350kcmil ---requires---→325 in-pounds tightening torque with 650 split-bolt

400kcmil ---requires---→325 in-pounds tightening torque with 825 split-bolt

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.