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20.20.027 Table 690.31(C) Correction Factors Temperature Rating of Conductor Temperature Temperature (°C) 60°C (140°F) 75°C (167°F) 90°C (194°F) 105°C (221°F) 30 1.00 1.00 1.00 1.00 86 31 - 35 0.91 0.94 0.96 0.97 87 - 95 36 - 40 0.82 0.88 0.91 0.93 96 - 104 41 - 45 0.71 0.82 0.87 0.89 105 - 113 46 - 50 0.58 0.75 0.82 0.86 114 - 122 51 - 55 0.41 0.67 0.76 0.82 123 - 131 56 - 60 - 0.58 0.71 0.77 132 - 140 61 - 70 - 0.33 0.58 0.68 141 - 158 71 - 80 - - 0.41 0.58 159 - 176 690.45 Size of Equipment Groundinc Conductor. Where not protected by the ground- fault protection equipment required by 690.5, the equipment-grounding conductor for photovoltaic source and photovoltaic output circuits shall be sized for 125 percent of the pho- tovoltaic-originated short-circuit currents in that circuit. Where pro- tected by the ground-fault protection equipment required by 690.5, the equipment-grounding conductors for photovoltaic source and photovoltaic output circuits shall be sized in ac- cordance with 250.122. 690.47 Grounding Electrode System. (A) Alternating-Current Systems. If installing an ac system, a grounding electrode system shall be provided in accordance with 250.50 through 250.60. The grounding electrode conductor shall be installed in accor- dance with 250.64. (B) Direct-Current Systems. If in- stalling a do system, a grounding electrode system shall be provided in accordance with 250.166 for ground- ed systems or 250.169 for unground- ed systems. The grounding electrode conductor shall be installed in accor- dance with 250.64. VI. Marking 690.51 Modules. Modules shall be marked with identi- fication of terminals or leads as to polarity, maximum over current (Pleasanton April 2003) '] 10_26