Conduit sizes Metric and Imperial
Thu Sep 07, 2017 7:32 pm
How can I easily convert from metric trade size to Imperial sizes for conduits?
Re: Conduit sizes Metric and Imperial
Thu Sep 07, 2017 7:46 pm
Starting in the 2006 edition of the Code, the metric trade designator has been used exclusively to identify conduit
size. The following table is provided for convenience only. This can be found on page XXX of the 2015 CEC
Conduit trade sizes
Inches Metric designator
3/8 12
1/2 16
3/4 21
1 27
1-1/4 35
1-1/2 41
2 53
2-1/2 63
3 78
3-1/2 91
4 103
5 129
6 155
size. The following table is provided for convenience only. This can be found on page XXX of the 2015 CEC
Conduit trade sizes
Inches Metric designator
3/8 12
1/2 16
3/4 21
1 27
1-1/4 35
1-1/2 41
2 53
2-1/2 63
3 78
3-1/2 91
4 103
5 129
6 155
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