Conductors entering buildings

[Jpflex]

NEC 300.5 D2 talks about protecting conductors to the point of entrance to a building from underground installations but can anyone point me to the code section area that may require nm cable with a jacket rather than solid THHN OR TW wire without a jacket to be used to connect outside wire to panel board breaker?

This code doesn’t say how wire is to be protected and the EMT that is outside the wall of building is not underground but connects panel breaker branch circuit to outside GFCI receptacles. Nor does it say jacketed NM cable has to be used to enter panel.

I’m thinking of putting an out door box to replace LB connector to EMT but what is to be done behind box to hole in outside wall? Causing, small section of EMT with bushing at end between wall, threaded fitting with bushing? I have not seen anything specific in NEC so far?

Here’s a picture of previous set up with just THHN (not wet listed) entering wall from receptacles outside via EMT

 

[augie47]

Little hard to follow but if the raceway is outside then 300.9 likely applies (or "damp location" definition and 334.12(B) would not allow Romex.
Basically no NM outdoors even in a raceway.

 

[Jpflex]

Little hard to follow but if the raceway is outside then 300.9 likely applies (or "damp location" definition and 334.12(B) would not allow Romex.
Basically no NM outdoors even in a raceway.

It’s just a connection inside breaker panel in home to branch circuit going outside to GFCI receptacles along house exterior walls

NEC 334.10 B1 says NM cable can be used in moist or damp locations but isn’t outdoors even if in outdoor breakout box considered a wet location? If so how can NM cable exit house walls and be made up in a junction box?

 

[augie47]

NEC 334.10 B1 says NM cable can be used in moist or damp locations

You might want to read that again.... there;'s a sneaky little letter "C" in the heading

 

[LarryFine]

Same way we've been able to use exterior panels, A/C disconnects, and lights with NM.

 

[augie47]

Reading Larry's answer made me look at the OP again. If you Romex only goes outside as far as the jbox then there is no problem. It just can't run in tjhe exterior conduit.

 

[Jpflex]

NEC 334.10 B1 says NM cable can be used in moist or damp locations

You might want to read that again.... there;'s a sneaky little letter "C" in the heading

I guess your referring heading NM and NMC

 

[Jpflex]

Reading Larry's answer made me look at the OP again. If you Romex only goes outside as far as the jbox then there is no problem. It just can't run in tjhe exterior conduit.

I would say this sounds about right but I can’t find a code to back this. If box is waterproof or rain tight etc and is out doors then the romex is being terminated or made out in outside box. As code is now this would be a violation

But I believe Romex nm needs to have connection to nm connector to panel knockout followed by bushing

 

[Jpflex]

Would picture below likely satisfy “protecting conductors up to point of entrance?”

The thread nipple is fitted with a bushing at end for NM cable to enter between outside and inside wall. The nm will be made out at box and connect to NM cable going to panel breaker

 

[Jpflex]

Threaded nipple with bushing will insert in wall home shown. Caulking will surround box

If this is not code compliant what would be alternative?

 

[augie47]

IMO, No. 314.17(B).. use a NM connector

 

[LarryFine]

Would picture below likely satisfy “protecting conductors up to point of entrance?”

The thread nipple is fitted with a bushing at end for NM cable to enter between outside and inside wall. The nm will be made out at box and connect to NM cable going to panel breaker

Use this with your box. It provides securing and weatherproofing.

Still apply a ring of caulk around the hole in the wall.

Halex 1/2 in. Service Entrance (SE) Water tight Conduit Connector 90661 - The Home Depot

Find the Halex 1/2 in. Watertight Conduit Connector 90661, die-cast zinc-alloy body connector is suitable for use with 14/2 and 12/2 cable from The Home Depot

www.homedepot.com

 

[Jpflex]

IMO, No. 314.17(B).. use a NM connector

Great thanks I’m checking that code reference now