Tables

Tables
303
B.C. Amendments to the 2006 CEC
© Canadian Standards Association
Table 17
Minimum size of grounding conductor for AC systems or
common grounding conductor
(See Rules 10-206, 10-700, and 10-812)
Ampacity of largest service conductor or
equivalent for multiple conductors
Size of copper grounding conductor,
AWG
100 or less 8
101 to 125 6
126 to 165 4
166 to 200 3
201 to 260 2
261 to 355 0
356 to 475 00
Over 475 000
Note: The ampacity of the largest service conductor, or equivalent if multiple conductors are used, is to
be determined from the appropriate Table in the Code, taking into consideration the number of
conductors in the raceway or cable and the type of insulation.
Table 18
Minimum Size of Grounding Conductor for Service Raceway
and Service Equipment
(See Rule 10-812)
Ampacity of Largest Service Size of Grounding Conductor
Conductors or Equivalent for
Multiple Conductors
Not Exceeding --- Amperes Copper
Wire AWG
Size of
Metal
Conduit or
Pipe
Size of
Electrical
Metallic
Tubing
60 8 21 (3/4) 27 (1)
100 8 27 (1) 35 (1-1/4)
200 6 35 (1-1/4) 41 (1-1/2)
400 3 63 (2-1/2) 63 (2-1/2)
600 1 78 (3) 103 (4)
800 0 103 (4) 103 (4)
Over 800 00 155 (6)