box and conduit fill calculations · 2020-02-28 · without outer covering and 4 -14 awg rhh cu...
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![Page 1: Box and Conduit Fill Calculations · 2020-02-28 · without outer covering and 4 -14 AWG RHH Cu Conductors with outer covering ? Table 5 – Cross-Sectional Area of Individual Conductors](https://reader035.vdocuments.mx/reader035/viewer/2022062915/5e99e62b9e2cc626d7008d8f/html5/thumbnails/1.jpg)
Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
Box andConduit FillCalculations
![Page 2: Box and Conduit Fill Calculations · 2020-02-28 · without outer covering and 4 -14 AWG RHH Cu Conductors with outer covering ? Table 5 – Cross-Sectional Area of Individual Conductors](https://reader035.vdocuments.mx/reader035/viewer/2022062915/5e99e62b9e2cc626d7008d8f/html5/thumbnails/2.jpg)
Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
![Page 3: Box and Conduit Fill Calculations · 2020-02-28 · without outer covering and 4 -14 AWG RHH Cu Conductors with outer covering ? Table 5 – Cross-Sectional Area of Individual Conductors](https://reader035.vdocuments.mx/reader035/viewer/2022062915/5e99e62b9e2cc626d7008d8f/html5/thumbnails/3.jpg)
Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
![Page 4: Box and Conduit Fill Calculations · 2020-02-28 · without outer covering and 4 -14 AWG RHH Cu Conductors with outer covering ? Table 5 – Cross-Sectional Area of Individual Conductors](https://reader035.vdocuments.mx/reader035/viewer/2022062915/5e99e62b9e2cc626d7008d8f/html5/thumbnails/4.jpg)
Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
![Page 5: Box and Conduit Fill Calculations · 2020-02-28 · without outer covering and 4 -14 AWG RHH Cu Conductors with outer covering ? Table 5 – Cross-Sectional Area of Individual Conductors](https://reader035.vdocuments.mx/reader035/viewer/2022062915/5e99e62b9e2cc626d7008d8f/html5/thumbnails/5.jpg)
Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
![Page 6: Box and Conduit Fill Calculations · 2020-02-28 · without outer covering and 4 -14 AWG RHH Cu Conductors with outer covering ? Table 5 – Cross-Sectional Area of Individual Conductors](https://reader035.vdocuments.mx/reader035/viewer/2022062915/5e99e62b9e2cc626d7008d8f/html5/thumbnails/6.jpg)
Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
Conductor Counts for other than wire
CableClamps
FixtureStud
Hickey
NM 12-2 W/GRD
Fixture Stud = 1 ConductorHickey = 1 ConductorCable Clamps (2) = 1 ConductorTotal Conductor Count = 3 Conductors
![Page 8: Box and Conduit Fill Calculations · 2020-02-28 · without outer covering and 4 -14 AWG RHH Cu Conductors with outer covering ? Table 5 – Cross-Sectional Area of Individual Conductors](https://reader035.vdocuments.mx/reader035/viewer/2022062915/5e99e62b9e2cc626d7008d8f/html5/thumbnails/8.jpg)
Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
Terminate in the box
Count 6 total conductorsAll ConductorsTerminate in the box
Through Box = 2Terminate in box = 4Total count = 6
Though the box
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
Factory installed clamps8-12’s & 1 clamp = 9
Factory or fieldinstalled clamps
#12 AWG Conductors #12 AWG Conductors
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
EGC
EGC = Equipment Grounding ConductorIEGC = Insolated Equipment Grounding Conductor
BJ = Bonding Jumper
BJ
IEGC
EGC = 1IEGC = 2BJ = 0Total = 2
To Receptacle
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
Octagonal / 4/0 Box
2 - #8 AWG2 - #12 AWG
2 - #12 AWG2 - #8 @3.00 Cu = 6 Cu inFix Stud/Hickey @3.00 Cu in = 3 Cu in4 - #12 @2.25 Cu in = 9 Cu inTotal = 18 Cu in
![Page 12: Box and Conduit Fill Calculations · 2020-02-28 · without outer covering and 4 -14 AWG RHH Cu Conductors with outer covering ? Table 5 – Cross-Sectional Area of Individual Conductors](https://reader035.vdocuments.mx/reader035/viewer/2022062915/5e99e62b9e2cc626d7008d8f/html5/thumbnails/12.jpg)
Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
#14 BareEGC
#8 AWG
#12 AWG
#18 AWG fixture wire
#10 AWG
#18 = 1.5 cu in x 2 = 3.00 cu in#14 = 2.0 cu in x 1 = 2.00 cu in#12 = 2.25 cu in x 4 = 9.00 cu in#10 = 2.50 cu in x 2 = 5.00 cu in#8 = 3.00 cu in x 2 = 6.00 cu inFix Stud/Hickey = #8 = 3.00 cu in = 3.00 cu inTotal Box volume required = 28.00 cu in
![Page 13: Box and Conduit Fill Calculations · 2020-02-28 · without outer covering and 4 -14 AWG RHH Cu Conductors with outer covering ? Table 5 – Cross-Sectional Area of Individual Conductors](https://reader035.vdocuments.mx/reader035/viewer/2022062915/5e99e62b9e2cc626d7008d8f/html5/thumbnails/13.jpg)
Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
Bad Planning
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
314.16(b)(1) ExceptionCanopy Cover
EGC
Terminations inCanopy Cover
To FanTo Fixture
4 - Smaller than #14 Fixture wires
Dome Canopy
Do not count for Box Fill Calculations
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
Counting with a device2 - #8 AWG
2 - #12 AWG
2 - #12 AWG
2 - #8 @3.00 cu in = 6 cu in4 - #12 @2.25 cu in = 9 cu inYoke/Device @2.25 cu in = 4.5 cu inTotal Volume Required = 19.5 cu in
Largest conductor allowed = #10NEC 110.14(A)
![Page 17: Box and Conduit Fill Calculations · 2020-02-28 · without outer covering and 4 -14 AWG RHH Cu Conductors with outer covering ? Table 5 – Cross-Sectional Area of Individual Conductors](https://reader035.vdocuments.mx/reader035/viewer/2022062915/5e99e62b9e2cc626d7008d8f/html5/thumbnails/17.jpg)
Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
Total conductors = 11 - #12 AWG4 X 2 1/8 “ (Deep) Box Required
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
Total Conductors = 8 #10 AWGBox Required = 4 X 2 1/8” (Deep) Box
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
“U” pull Junction Box Calculation
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
Conduit FillCalculations
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
RMC and IMC With Threaded Couplings
NEC 344.30
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
Rigid PVC
NEC 352.30
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
Major Fraction Change
Chapter 9, Table 1, Note 7
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
Table 5 – Cross-Sectional Area of Individual Conductors2/0 AWG THW Cu = .2624 X 3 = .78724/0 AWG THHN Cu = .3237 X 4 = 1.2984Total Square Inches for Conductors = 2.0820
Table 4 – 40% fill column for “Over 2 wires”.2.0820 Sq.In. Requires a 2 ½ inch EMT Conduit40% fill for 2 ½ inch EMT = 2.343 Sq. In.
Answer = 2 ½ Inch EMT
What size EMT is needed for 3 - 2/0 AWG THW Cuconductors and 4 - 4/0 AWG THHN Cu conductors ?
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
What size IMC is required for 6 - 12 AWG RHH Cu conductorswithout outer covering and 4 -14 AWG RHH Cu Conductors
with outer covering ?
Table 5 – Cross-Sectional Area of Individual Conductors14 AWG RHH Cu With Outer Covering = .0293 X 4 = .117212 AWG RHH Cu Without Outer Covering = .0260 X 6 = .1560Total Square Inches for Conductors = .2732
Table 4 – 40% fill column for “Over 2 wires”..2732 Sq.In. Requires a 1 inch IMC Conduit40% fill for 1 inch IMC = .384 Sq. In.
Answer = 1 Inch IMC
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Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
Copyright 1999-2019 Dan Dudley
Box & conduit Fill Calculations
Box & Conduit Fill Exam
30 Minutes