Thermal Unit Model B4.15 For Use With Square D Motor Starters NEC Article 430 Part C NEMA Size 00 0 1 1P Selection 1 Motor FLA/SF 2 Motor and Starter in SAME Ambient Temp 3 For 1.15 to 1.25SF Thermal Unit Amp Equal Motor FLA/1.0SF Thermal Unit Amp Equal 90% Motor FLA IF Motor Ambient Temp 18F of Starter-Thermal Unit Amp Equal 10% Derate of 3 IF Motor Ambient Temp -18F of Starter-Thermal Unit Amp Equal 5% Increase of 3 Do NOT Exceed Starter Rating