Does a myers hub allow you to forfiet the 3' rule?

[rhamblin]

I have seen a lot of installations where a conduit is run vertically from an industrial machine using a myers hub and not having a support on the bottom. Is there a code exception I am missing?

 

[jumper]

I believe 344.30(B) allows this.

Exposed vertical risers from industrial machinery or fixed equipment shall be permitted to be supported at intervals not exceeding 6 m (20 ft) if the conduit is made up with threaded couplings, the conduit is sup- ported and securely fastened at the top and bottom of the riser, and no other means of intermediate support is readily available.

 

[infinity]

I believe 344.30(B) allows this.

Exposed vertical risers from industrial machinery or fixed equipment shall be permitted to be supported at intervals not exceeding 6 m (20 ft) if the conduit is made up with threaded couplings, the conduit is sup- ported and securely fastened at the top and bottom of the riser, and no other means of intermediate support is readily available.

Without an additional support how is the conduit supported at the bottom of the riser where is enter the equipment?

 

[jumper]

Without an additional support how is the conduit supported at the bottom of the riser where is enter the equipment?

By the hub and equipment, I guess.

This is the section that most cite as allows the install.

I have piped to many machines using this method and never been called.

 

[rhamblin]

By the hub and equipment, I guess.

This is the section that most cite as allows the install.

I have piped to many machines using this method and never been called.

Is this the consensus of the masses?

 

[infinity]

Jumper posted two sections, from post #2 " the conduit is supported and securely fastened at the top and bottom of the riser".

From the graphic under the 2005 NEC "the conduit is securely fastened at the top and bottom of the riser."

They don't sound the same to me.