2 —
e
lectri
c
alc
®
P
ro
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)
