MASSDRIVER
Registered User
What is the code for this?
Yes or no?
Underslab plastic conduit.
Brent.
Yes or no?
Underslab plastic conduit.
Brent.
300.5(b)......gfretwell said:buried conduit is still a wet location.
Jar, yes. Sorry about that. Romex is like Kleenex to me. Wrong nomenclature.chris kennedy said:300.5(b)......
Sounds to me like your looking at smurf conduit (Carbon Flex-Plus Blue). 2008 NEC, Electrical Nonmetalic Tubing. 362.10 Uses Permitted. (7) For wet locations indoors as permitted in this section or in a concrete slab on or belowgrade, with fittings listed for the purpose.MASSDRIVER said:What is the code for this?Yes or no?
Underslab plastic conduit.
Brent.
One reason could be that the installer may already have a boat-loadof the smurf & UF, and does not want to go purchase the"I believe you can pull UF under a slab in smurf but why bother? (THHN)/THWN is cheaper."
...and here is a picture of Smurf tube - View attachment 848jar546 said:Here is a picture of ENTView attachment 1971
Both UF and NMC can be run in conduit but in underground installations the wire is required to be listed for wet locations along with above ground exsposed to weather when run in conduit in both scenarios inside the conduit is considered a wet locationMASSDRIVER said:Pardon me for being less than clear. What we have is regular grey conduit than protrudes into a pony wall that backs an island cabinet. The plastic conduit has uf cable coming out to feed disposal, dw and island counter circuits. As I remember from my Lennar days we ran conduit from the island to the panel location up out of the stemwall. So constant under slab conduit. We have to run another circuit for the under counter micro in a new island.
I always thought (pardon my ignorance) that you never run "Romex", or a sheathed cable into conduit because of heat concerns. I was told that the city requires the uf cable even in conduit. So I'm trying to learn what's correct so I don't have to do it twice.
Also, I want to use the existing conduit of course without tearing out too much slab. I believe there is an inch pipe and a 1/2 inch pipe existing.
Thanks
Brent
Notes to Tables(1) See Informative Annex C for the maximum number of
conductors and fixture wires, all of the same size (total
cross-sectional area including insulation) permitted in
trade sizes of the applicable conduit or tubing.
(2) Table 1 applies only to complete conduit or tubing systems
and is not intended to apply to sections of conduit
or tubing used to protect exposed wiring from physical
damage.
(3) Equipment grounding or bonding conductors, where installed,
shall be included when calculating conduit or tubing
fill. The actual dimensions of the equipment grounding
or bonding conductor (insulated or bare) shall be used
in the calculation.
(4) Where conduit or tubing nipples having a maximum
length not to exceed 600 mm (24 in.) are installed between
boxes, cabinets, and similar enclosures, the
nipples shall be permitted to be filled to 60 percent of
their total cross-sectional area, and 310.15(B)(3)(a) adjustment
factors need not apply to this condition.
(5) For conductors not included in Chapter 9, such as multiconductor
cables and optical fiber cables, the actual
dimensions shall be used.
(6) For combinations of conductors of different sizes, use
Table 5 and Table 5A for dimensions of conductors and
Table 4 for the applicable conduit or tubing dimensions.
(7) When calculating the maximum number of conductors
permitted in a conduit or tubing, all of the same size
(total cross-sectional area including insulation), the
next higher whole number shall be used to determine
the maximum number of conductors permitted when
the calculation results in a decimal of 0.8 or larger.
(8) Where bare conductors are permitted by other sections
of this Code, the dimensions for bare conductors in
Table 8 shall be permitted.
(9) A multiconductor cable or flexible cord of two or more
conductors shall be treated as a single conductor for
calculating percentage conduit fill area. For cables that
have elliptical cross sections, the cross-sectional area
calculation shall be based on using the major diameter
of the ellipse as a circle diameter.
That is the most practical info I've seen in a long time. I'm with ya!gfretwell said:I have been torture testing some on my boat for over 20 years. Sun and salt water won't kill it.
As a totally non-electrical use, I sleeved my steering cable with 3/4" smurf, running under a pontoon boat in salt water and it is as good as new for all that time.BSSTG said:That is the most practical info I've seen in a long time. I'm with ya! BS