Something new to me, I have a new motor to install, 20 HP, 460 V. On the nameplate it has FLA 35 amps, next line down it has PF amps 40. Never saw this before. Do I size the heaters on FLA or PF amps? No paperwork with the new motor. The old motor I'm replacing has FLA of 35 and pulls 24 amps. We are replacing old motors with high efficiency motors to get a break from POCO.