Conduit strapping

[electricalist]

Why is it that the first 3 ' is not strapped on conduits. Usually on gas stations I see this outside,as well as bldg s with large mechanical rooms.
Original new work.

 

[liquidtite]

Why is it that the first 3 ' is not strapped on conduits. Usually on gas stations I see this outside,as well as bldg s with large mechanical rooms.
Original new work.

Nec states emt had to be supported within 3' of box ANC then every 10' .

 

[electricalist]

I know they should be.

 

[electricalist]

Wondering why it's so often over looked when it got inspected. I've seen guys put the first strap 10-12 up from the floor and get away with it.

 

[Carultch]

Nec states emt had to be supported within 3' of box ANC then every 10' .

Is there an allowed length of conduit that can be supported only by its terminations? Obviously you shouldn't need to strap a close nipple.

I'd imagine that 1 ft would be allowed.

What about stubs on a rooftop or up out of the ground, with immediately adjacent equipment?

 

[electricalist]

Is there an allowed length of conduit that can be supported only by its terminations? Obviously you shouldn't need to strap a close nipple.

I'd imagine that 1 ft would be allowed.

What about stubs on a rooftop or up out of the ground, with immediately adjacent equipment?

Exactly.
This question wasn't to imply bad inspectors or hack electricians.
I have a supervisor who knows what 3 ' is and on his job we do too. Yep.
I'm working on my big boy electrical installs and where it's generally accepted to do something. Not as to cheat but because it'll be ok. Thanks.

 

[Fulthrotl]

Why is it that the first 3 ' is not strapped on conduits. Usually on gas stations I see this outside,as well as bldg s with large mechanical rooms.
Original new work.

3' & 10' for conduit.

GRC in large sizes has spacing past 10', or used to anyway..
iirc 4" GRC was spacing 20' apart, but still within 3' of the end
of the run.

condulets don't require support within 3', but only if they are approprate
for the conduit system... die cast conduets for thinwall, and malleable
condulets for GRC. common sense.... if you use a thin die cast C condulet
in a run of 4" GRC, without support, it's probably not going to survive long.

 

[Dennis Alwon]

There are exceptions for the 3' rule. Here is the section for emt

358.30 Securing and Supporting. EMT shall be installed
as a complete system in accordance with 300.18 and shall
be securely fastened in place and supported in accordance
with 358.30(A) and (B).
(A) Securely Fastened. EMT shall be securely fastened in
place at least every 3 m (10 ft). In addition, each EMT run
between termination points shall be securely fastened within
900 mm (3 ft) of each outlet box, junction box, device box,
cabinet, conduit body, or other tubing termination.
Exception No. 1: Fastening of unbroken lengths shall be
permitted to be increased to a distance of 1.5 m (5 ft) where
structural members do not readily permit fastening within
900 mm (3 ft).
Exception No. 2: For concealed work in finished buildings
or prefinished wall panels where such securing is impracticable,
unbroken lengths (without coupling) of EMT shall
be permitted to be fished.

 

[electricalist]

Thanks Throttle and Dennis.
Knowing these small details can mean the diff.between moving on with it or as I have done,,look in my truck 2 or 3 times for something to get it strspped.