*** Can SER cable run partially with outer jacket removed where it runs thru PVC?

[mp333]

Installing a sub panel in a attached garage which is finished.

I would like the feeder cable in pvc in the garage for protection than having the Romex cable stapled on the wall. However there is not much room to run pvc conduit all the way in to the main panel (in Basement) and use THHN.

Wondering if I can run (Romex Simpull E18679) SER 4/3 with #8 for ground NM-B copper cable partially with outer jacket removed where it would run thru PVC conduit? From the main panel it would have the jacket and right where it leaves the basement it would enter into the pvc conduit and the outer jacket would be removed for ease of installation. Total length is 16ft. Half of that jacket would be stripped and running thru pvc.

Can I do this? If yes do I need a bushing or is there is any way to seal the end of conduit in the basement?

Thank you

 

[pattenp]

No, by NEC you are not to strip off the outer jacket when run in conduit. If you need a conduit sleeve for protection then use large enough conduit size for the cable to slip through.

 

[mp333]

No, by NEC you are not to strip off the outer jacket when run in conduit. If you need a conduit sleeve for protection then use large enough conduit size for the cable to slip through.

What size conduit would you recommend? Would it be the same size for THHN?
Thank you

 

[pattenp]

You size conduit for a cable based on the cable's largest diameter to figure the cables area. 8/3 Romex will need 1" conduit for no more than a 40% fill.

 

[wyliesdiesels]

SER uses the same wiring methods as NM-b with a few exceptions. Cant strip the jacket and use the individual conductors in conduit.

 

[alfredeneuman]

You size conduit for a cable based on the cable's largest diameter to figure the cables area. 8/3 Romex will need 1" conduit for no more than a 40% fill.

According to Chapter 9, Table 4 of the NEC. with a single cable the fill is required to be no more than 53% of the conduit.
100% of 1" Sch 40 internal volume is .832" , the cable can be no more than .441 in diameter .

 

[mp333]

So then either i run Romex 4/3 all the way from the main to the sub panel no conduit and staple to the wall or run pvc to the main panel and then use THHN....
If THHN (3)4AWG and (1)8AWG for Ground what size PVC do I need?

Thank you all.

 

[pattenp]

According to Chapter 9, Table 4 of the NEC. with a single cable the fill is required to be no more than 53% of the conduit.
100% of 1" Sch 40 internal volume is .832" , the cable can be no more than .441 in diameter .

.441 in the table for 1 wire is volume not diameter. 8/3 Romex is listed as 565mil diameter. Which has a calculated area of .250 in2 which is well below .441 in2. Actually the 8/3 Romex will fit in 3/4 conduit which is .269 in2 @ 53% fill.

Edit: Oh hells bells... I'm looking at 8/3 Romex not 4/3 forget what I said for 1' Conduit.

 

[pattenp]

For 4/3 Romex you need 1.25" conduit.
4/3 Romex has a diameter of 814 mils with a calculated area of .52 in2.

For individual THHN/THWN (3)4# and (1)#8 you need 1" conduit.

 

[hnsy]

Thanks for asking this question, I didn't know the answer either

 

[mp333]

No, by NEC you are not to strip off the outer jacket when run in conduit. If you need a conduit sleeve for protection then use large enough conduit size for the cable to slip through.

Just wondering re my original question....
The reason you can't remove the outer Jacket on the Romex is because the individual Wire have no markings on it? However the remainder cable would have the jacket which has all the identification of the cable.

 

[pattenp]

The jacket is also required to enter any box or panel where splices or terminations are made.

 

[mp333]

Got it. So is there any difference between the THHN and the individual Romex cables?