2 — electricalc®Pro
AMPACITY WIRE SIZING ....................................................................30
Wire Sizing Based on Insulation Rating............................................31
Re-Sizing Wire Based on Different Insulation Ratings......................32
Wire Sizing Based on Ambient Temperature ....................................32
Wire Sizing Based on Material Type .................................................34
Sizing Parallel Conductors................................................................35
Finding Derated Wire Size................................................................36
Sizing Temperature-Adjusted Derated Wires....................................36
VOLTAGE DROP..................................................................................38
Finding Single-Phase Voltage Drop..................................................38
Finding Three-Phase Voltage Drop...................................................39
Finding Voltage Drop Wire Size........................................................40
Finding Voltage Drop Distance .........................................................41
Finding Voltage Drop Resistance......................................................43
GROUND CONDUCTOR WIRE SIZE..................................................44
EQUIPMENT GROUNDING COUNDUCTOR WIRE SIZE...................45
FUSE AND CIRCUIT BREAKER SIZE .................................................45
STARTER SIZE ....................................................................................47
OVERLOAD PROTECTION SIZE ........................................................47
CONDUIT SIZE ....................................................................................48
Finding Motor Branch-Circuit Wire Size and Conduit Size —
Same Wire Type and Size ................................................................49
Finding Conduit Sizes For Multiple Conductors —
Same Wire Type and Size ................................................................50
Finding Number of Wires in Existing Conduit —
Same Size, Various Types ..............................................................51
Finding Conduit Size —
Multiple Conductors, Different Wire Sizes and Types.......................52
CONVERTING KILOWATT-HOUR AND BTU.......................................53
PARALLEL RESISTANCE ....................................................................54
APPENDIX A — DEFAULT SETTINGS.............................................55
APPENDIX B — PREFERENCE SETTINGS ....................................56
APPENDIX C — 2011 NEC REFERENCES ......................................57
APPENDIX D — CARE INSTRUCTIONS..........................................57
APPENDIX E — ACCURACY/ERRORS,
AUTO SHUT-OFF, BATTERIES, RESET...........................................58
REPAIR AND RETURN......................................................................60
WARRANTY.......................................................................................61
(cont’d)
