Cabling/Metallic Flexible Conduit Question

[Coco_HueHueHue]

Hello,

Reading Canadian Electrical Code 12-1004 (Rigid and Flexible Metal Conduit), it is written:

"No conduits having an internal diameter of less than 16 trade size shall be used, except that

a) 12 trade size flexible metal conduit shall be permitted to be used for runs of not more than 1.5m for the connection of Equipment"​

Do this mean that conduit of trade size 16 and above do not have any maximum length?
If yes, it probably means that it can be interpreted the same way for section 12-1302 about liquid-tight flexible conduit.

Thank you for your help!
Coco

 

[Coco_HueHueHue]

Anybody?
I know this is specific to the Canadian Electrical Code.

If anyone can confirm if this logic is OK for the NEC, it often is a copy and paste for the CEC.

For NEC users, trade size 12 = 3/8" and trade size 16 = 1/2" to this "wording".

Or is there any other place on the forum where this question would be more adequate for the section? I could not find a better one than this one.

Thanks,
Coco

 

[waross]

I have never seen a maximum length for conduit.
I've been using the CEC for over 50 years.
The rules for flexible conduit have changed over the years.
As I remember the flex length restrictions had to do with using the flex for bonding.
With a separate bonding conductor rather than the conduit as a bonding conductor, the restrictions have gone away.

Bill
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"Why not the best?"
Jimmy Carter

 

[Coco_HueHueHue]

Thanks Waross,

So I guess then that it confirms my understanding that only 3/8" conduit is restricted in length.