Generally the maximum support spacing requirement for rmc rigid metallic conduit of trade size 1 is 10 ft but for straight runs with threaded couplings this spacing is increased to 12 ft.
Want to use rmc conduit as patio roof support.
Most often alternative materials are chosen because the structure needs additional strength or for style reasons to better complement the home s architectural style or landscape.
Rigid metal conduit and intermediate metal conduit are heavy duty rigid metal tubing used for structural applications typically outdoors.
You will need to make sure that each of the posts is plumb.
Once both of the brackets are secured set a post into them.
Conduit supports and installation methods.
3 runs of 500 kcmil aluminum xhhw 2 would be more practical.
The enclosure must be securely fastened to the support wire with a fastening device specifically identified for the.
Rigid metal conduit weights and dimensions 10 lengths for information only.
Continue installing porch roof supports.
Both rmc and imc are joined with threaded connections.
There should never be more than the equivalent of four right angle bends between outlets or fittings.
4 grc is a two man portage imho.
370 23 d 2 enclosures fastened to support wires an enclosure may be fastened to a suspended drop ceiling support wire while meeting the requirements of sections 300 11 a and 370 23 d 2.
Wheatland trade sizes 3 through 6 are ul listed for use with directional boring equipment.
To install conduit overhead and underground properly you need to review the appropriate articles of the code.
Not a ul 6 requirement.
Nothing in the nec states that you cannot use the same supports for conduit as for other systems.
Imt has largely replaced rmc in new construction.
With the first porch roof support in position you can then continue to work along the porch.
As stated in section 370 23 d the enclosure s size cannot exceed 100 cubic inches.
If your home has overhead service wires coming in from the utility that connect to a pole on top of the roof the pipe that extends above the roof is probably rmc or imc.
Rigid metal conduit and intermediate metal conduit are heavy duty conduits made of galvanized steel.
Conduit should run as straight and direct as possible.
It s not as if a fork lift is going to back into it.
Use 2 inch carriage bolts to secure the posts to the mounting brackets.
Standard 20mm plastic conduit will be fine another method would be to use a cable type called hi tuff which is made for outdoor use you wouldn t really need to use conduit with that as long as it s not likely to suffer mechanical damage although it would provide additional protection of course.
Aluminum rmc beats steel rmc in this application too.
Back injury risk upon a roof top emt is usually the way to go.
And of course direct lay down is prohibited upon a membrane roof.
