The insulation class is not quite the same as the T-code or temperature rise. [Section 500.8(C)(4)] It is, however, a pretty good indicator of the maximum temperature anticipated. See also Section 500.8(D)(2) and its IN reference to NFPA 499. Actually, NFPA 499 is a wealth of information.The standard solenoid coils are rated for 155C, which is below the temperature limit of 165C. We were likewise looking at a motor that is also similarly rated (both are class F insulation). Will these be acceptable?