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APPENDIX FORMULAS AND DEFINITIONS Rating Voltage Current Resistance The following formulas and definitions apply to all applications: DEFINITION: Resistivity, ρ Ωmm2/m (Ω/cmf) The resistance of a conductor, R20, is directly propor- tional to its length, L and inversely proportional to its
APPENDIX EXAMPLES Tubular element for a flat iron Rating, P 1,000 W Voltage, U 220 V Final tube diameter 8 mm (0.315 in) Final tube length 300 mm (11.8 in) If the terminal length inside the tube is 2 × 25 mm the coil length (Le) will be Le = 300 mm – (2 × 25 mm) = 250 mm (9.8 in). Hot
