TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR...
-
Upload
jodie-park -
Category
Documents
-
view
222 -
download
0
Transcript of TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR...
![Page 1: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/1.jpg)
TTS 171 : PART 1: 2002
ANNEX E
PRESENTER
WINSTON THOMAS
ELECTRICALELECTRICAL INSPECTOR 1INSPECTOR 1
![Page 2: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/2.jpg)
MAXIMUM CONDUCTORS IN CONDUIT AND BOXES
• Objective
• Simple guide
• Calculation
![Page 3: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/3.jpg)
Cont’d.
• Maximum number of cables
• Conduits
• Boxes
![Page 4: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/4.jpg)
CONDUITS • Electrical Metallic Tubing or
E.M.T
• Steel heavy gauge conduit
• PVC conduit
![Page 5: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/5.jpg)
• Surroundings
• Ambient temperature
• Level of mechanical
protection
APPLICATION
![Page 6: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/6.jpg)
CAPACITIES
• For the maximum capacities
• Reference to Annex E
• Relevant table
![Page 7: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/7.jpg)
TABLES IN ANNEX E
• Four tables
• Maximum PVC insulated
non sheathed cables
• Space factor of 40 %
![Page 8: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/8.jpg)
Cont’d.
• Two 900 bends
• Additional bends
• Cables reduced
![Page 9: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/9.jpg)
USE OF TABLES
• Calculate number of cables
for circuit
Choose cable size in column
Use maximum number of cables column
![Page 10: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/10.jpg)
Cont’d.
Choose value equal to or greater than number of
cables
Go to corresponding column for conduit size
![Page 11: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/11.jpg)
TABLE E 2a
Covers maximum capacities
Steel conduit and E.M.T
• PVC insulated non-sheathed
single core cables
![Page 12: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/12.jpg)
Cont’d.
• Same cross-sectional area
• Imperial, AWG or MCM
and Metric sizes
![Page 13: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/13.jpg)
Example
A 115/230V single phase a.c
circuit requiring 16mm2 single
core cables is to be run in an
E.M.T conduit .
To determine conduit size.
![Page 14: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/14.jpg)
Calculate Number of cables. (3)
Cable size column. (16mm2)
Maximum number cables column. (4)
Corresponding conduit size of 27 mm or (1 in).
![Page 15: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/15.jpg)
![Page 16: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/16.jpg)
Table E 2b
• Covers maximum capacities.
Steel heavy gauge conduits.
PVC insulated cables of same cross-sectional area.
![Page 17: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/17.jpg)
Example
Using three 16mm2 cables as in
the previous example.
Follow same steps.
Conduit size approximately the
same.(25mm)
![Page 18: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/18.jpg)
![Page 19: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/19.jpg)
Table E 2c
• Covers maximum capacities.
PVC conduits
PVC insulated cables of same cross-sectional area
![Page 20: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/20.jpg)
Example
Same circuit to be run in PVC
conduit.
A grounding conductor is now
required.
Number of cables. ( 4 )
![Page 21: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/21.jpg)
Cont’d
Maximum number of cables column. (5)
Conduit size - 32mm
![Page 22: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/22.jpg)
![Page 23: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/23.jpg)
Table E1
• New addition to code.
• Covers maximum capacities.
• All types of conduits.
![Page 24: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/24.jpg)
Cont’d
• PVC insulated cables of different cross-sectional areas
• Conduit factor
• Conductor factor
.
![Page 25: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/25.jpg)
![Page 26: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/26.jpg)
Four 2.5mm 2 , four 4.0mm 2 and
two 6.0mm 2 cables, are to be
drawn into a conduit.
Total conductor factor = Sum of
cable conductor factors.
Example
![Page 27: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/27.jpg)
Cont’d.
Conduit factor shall be equal
to or greater than total
conductor factor.
![Page 28: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/28.jpg)
4 x 4.0mm2 factor = 4 x 39 = 156
2 x 6.0mm2 factor = 2 x 50 = 100
Total 376
Conduit factor - 486
Conduit 27mm ( 1 in. )
4 x 2.5mm 2 factor = 4 x 30 = 120
![Page 29: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/29.jpg)
![Page 30: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/30.jpg)
CAPACITIES OF BOXES
Table E 3
• New addition to code.
• Maximum capacities.
• Outlet and junction boxes
![Page 31: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/31.jpg)
![Page 32: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/32.jpg)
Sixteen 4.0mm2 cables to be
spliced in a box.
Determine size of box.
First go to column for 4.0mm
cables.
Example
![Page 33: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/33.jpg)
Cont’d.
Then to row where value is equal to or greater than sixteen.
Then to box in correspondingrow. (4 11/16 x 2 1/8)
![Page 34: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/34.jpg)
![Page 35: TTS 171 : PART 1: 2002 ANNEX E PRESENTER WINSTON THOMAS ELECTRICALINSPECTOR 1 ELECTRICAL INSPECTOR 1.](https://reader035.fdocuments.us/reader035/viewer/2022062308/56649e425503460f94b356b4/html5/thumbnails/35.jpg)
THE END