[TowerTalk] Pulling coax through PVC pipe

[jimlux]

On 1/30/18 4:03 PM, Charlie at thegallos.com wrote:
> Shane,
> Does section 300 apply to low voltage wiring? I was under the impression that below 30 volts(?) the NEC was pretty much silent till the new 400 section(s)

low voltage stuff has always been in NEC. Class 1 and Class 2; limited 
energy or not, etc.  (like doorbell circuits)

Rules about separation of conductors, etc.


> 
> 73 de KG2V
> 
>> On Jan 30, 2018, at 2:33 PM, Shane Youhouse <kd6vxi at gmail.com> wrote:
>>
>> I wouldn't be so quick to run ANY romex through PVC when it's buried.  It's
>> against code.
>>
>> Article 300 of the NEC states any buried pipe is considered a wet location.
>>
>> *300.5 Underground Installations.*
>> *(B) Wet Locations.* The interior of enclosures or raceways installed
>> underground shall be considered to be a wet location. Insulated conductors
>> and cables installed in these enclosures or raceways in underground
>> installations shall be listed for use in wet locations and shall comply
>> with 310.10(C). Any connections or splices in an underground installation
>> shall be approved for wet locations.
>>
>> Then, article 334 implicitly states you may NOT use romex (NM) in damp
>> locations.
>>
>> *334.12 Uses Not Permitted.*
>> *(B) Types NM and NMS*. Types NM and NMS cables shall not be used under the
>> following conditions or in the following locations:
>>
>> (4) In wet or damp locations
>>
>> As such, you are MUCH better off running single runs of wire in addition to
>> a heavy ground to keep SPG intact
>>
>> There are a LOT more rules regarding NM style wiring, but this is the gist.
>>
>> Also, it's not always wrong to mix 120 volt and low voltage.  As long as
>> you use THHN or other 600 volt insulation and all wiring is class 1, you're
>> OK.
>>
>> --Shane
>> KD6VXI
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk at contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
> 
> _______________________________________________
> 
> 
> 
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>