LFNC Fittings for DB

[Dennis Alwon]

According to section 356.42 it seems that lfnc connectors, if they are straight not angle ones, are allowed for db. However, I don't see listing on the fitting for DB. The section does not say the fittings must be listed for DB so what's the buzz on this?

356.42 Couplings and Connectors.
Only fittings listed for use with LFNC shall be used. Angle connectors shall not be used for concealed raceway installations. Straight LFNC fittings are permitted for direct burial or encasement in concrete.

 

[Dennis Alwon]

I did find one that is listed for db https://www.electriflex.com/products/type-nm/-- actually I am confused ny that website. They call the conduit nm

however does the product need to be listed for db if the section clearly allows it?

 

[infinity]

I see nothing in the section you've posted that requires the fitting to be listed for direct burial. The fact that it states that listed straight fittings are permitted for direct burial nothing more is required.

 

[Dennis Alwon]

That was my thought but is that an oversight of the cmp?

 

[infinity]

That was my thought but is that an oversight of the cmp?

Not sure, maybe all fittings are tested and therefore compatible with being buried.

 

[Dennis Alwon]

I found this in the white book

Liquid-tight Flexible Metal Conduit Fittings — Liquid-tight flexible metal conduit fittings in the 1-1/4 in. and smaller trade sizes are considered suitable for grounding for use in circuits over and under 250 V and where installed in accordance with the NEC. A straight metallic fitting for use in direct contact with earth is marked ‘‘Direct Burial.’’

 

[Little Bill]

I found this in the white book

That is for metallic, you seem to be talking about non-metallic in your OP.
BTW, I have used non-metallic for DB with fittings and inspector didn't have a problem with it.

 

[Dennis Alwon]

Oh yeah I missed that

 

[Dennis Alwon]

Same thing though

Liquid-tight Flexible Nonmetallic Conduit Fittings — Liquid-tight flexible nonmetallic conduit fittings are marked as follows: 1. A fitting for Type A conduit only is marked ‘‘Liquid-Tight Flexible Nonmetallic Conduit Type A Only,’’ ‘‘LFNC-A only’’ or ‘‘FNMC-A only.’’ 2. A metallic fitting for Type B is marked ‘‘Liquid-Tight Flexible Nonmetallic Conduit Type B Only,’’ ‘‘LFNC-B’’ or ‘‘FNMC-B.’’ 3. A nonmetallic fitting for Type B conduit only is marked ‘‘Liquid-Tight Flexible Nonmetallic Conduit Type B Only,’’ ‘‘LFNC-B only’’ or ‘‘FNMC-B only.’’ 4. A nonmetallic fitting for Type C conduit only is marked ‘‘Liquid-Tight Flexible Nonmetallic Conduit Type C Only,’’ ‘‘LFNC-C only’’ or ‘‘FNMC-C only.’’ 5. A straight nonmetallic or metallic fitting for use in direct contact with earth is marked ‘‘Direct Burial.’

 

[infinity]

I found this in the white book

Still nothing in the NEC that would require you to use one marked DB in the ground.