Look harder. Home Depot and Lowes both have 3/8" straps. They may be in the section for bx/ac/mc fittings area.I have 3/8 flex conduit I need to secure to a brick wall, the problem I have is finding a strap or device to secure the conduit to the wall. I can only find sizes from 1/2.
Should I ditch the 3/8 and go 1/2?
You are in the wrong article. Try 348.350.20 States that you can't use anyting under 1/2 inch.
Use 1/2" PVC.
Alright, I will look harder. Sometimes they stock the times all over the place so its hard to find what your looking for.
Thanks for the help.
Its going to feed a furnace, so I'm going to go for 1/2.348.20 Size.
(A) Minimum. FMC less than metric designator 16 (trade
size 1⁄2) shall not be used unless permitted in 348.20(A)(1)
through (A)(5) for metric designator 12 (trade size 3⁄8).
(1) For enclosing the leads of motors as permitted in
(2) In lengths not in excess of 1.8 m (6 ft) for any of the
a. For utilization equipment
b. As part of a listed assembly
c. For tap connections to luminaires (lighting fixtures)
as permitted in 410.67(C)
(3) For manufactured wiring systems as permitted in
(4) In hoistways as permitted in 620.21(A)(1)
(5) As part of a listed assembly to connect wired luminaire
(fixture) sections as permitted in 410.77(C)
(B) Maximum. FMC larger than metric designator 103 (trade
size 4) shall not be used.
FPN: See 300.1(C) for the metric designators and trade
sizes. These are for identification purposes only and do not
relate to actual dimensions.
Table 344.30(B)(2) Supports for Rigid Metal Conduit
Between Rigid Metal
Designator Trade Size m ft
16–21 1⁄2–3⁄4 3.0 10
27 1 3.7 12
35–41 11⁄4–11⁄2 4.3 14
53–63 2–21⁄2 4.9 16
78 and larger 3 and larger 6.1 20
Use 1/2". I failed an inspection one time because I used 3/8 to feed a water cooler.
I am very lucky, A 20 minute drive from home puts me at Lowes, Menards, or Home Depot, and they are all close to each other.Thanks for the link.
Maybe I can get a list of everything I will need because lowes, menards, etc. are far away...
Isn't a furnace exposed? Wouldn't it require EMT or other conduit system that is rated to provide protection from physical damage. I remember asking KC one time about using a BX whip to my furnace and he said it should not be allowed. So I replaced it with EMT.Its going to feed a furnace, so I'm going to go for 1/2.
Haha, I am about 10 mins on a bad day with traffic where I currently live, my new house i'll be less than 5 mins away. Where I am at, the Home Depot and Menards are directly across the street from each other.I am very lucky, A 20 minute drive from home puts me at Lowes, Menards, or Home Depot, and they are all close to each other.
I guess you can always order online.
Haha, I am about 10 mins on a bad day with traffic where I currently live, my new house i'll be less than 5 mins away. Where I am at, the Home Depot and Menards are directly across the street from each other.
To the op, when our furnace was replaced they used 3/4" flex and used it just as a sleave for the 14/2 romex. Total length of the run from the joist through the switch box and into the furnace is probably 4 or 5 feet.
I just found the thread where we discussed this, this might be of use to youI'll just have a j-box with flex and individual thhn inside of it.
Well, "subject to physical damage" is a really fuzzy term. Romex is allowed to be exposed in places where not "subject to physical damage". If you are installing wiring in a loading dock with tractor trailers backing in, then flex would be a bad choice. But if you are whipping a circuit in for a furnace in your basement, then there really isn't a problem. Also, you might consider that EMT may transmit small vibrations from a running furnace, and might cause annoying sounds. I would not hard pipe very many pieces of equipment. Air handlers, condenser units, cooktops, ovens, transformers, pumps, lay-in fluorescent lights... etc all get flex or seal-tite whips.Isn't a furnace exposed? Wouldn't it require EMT or other conduit system that is rated to provide protection from physical damage. I remember asking KC one time about using a BX whip to my furnace and he said it should not be allowed. So I replaced it with EMT.
EMT is getting really cheap, under $2 for 1/2" now.