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#190283 - 11/10/09 01:07 PM MC cable supported by ariel Cable . Amperage rate?  
Yoopersup  Offline
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600 volt three conductor (310.20??), or 4160 three conductor(310.73??) either with messager.
Yoopersup


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#190284 - 11/10/09 02:21 PM Re: MC cable supported by ariel Cable . Amperage rate? [Re: Yoopersup]  
gfretwell  Offline


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If the 3 conductors are in a metal jacket I don't think any "free air" table applies (one opinion).


Greg Fretwell

#190285 - 11/10/09 02:47 PM Re: MC cable supported by ariel Cable . Amperage rate? [Re: gfretwell]  
renosteinke  Offline
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IMO: Not only do you use the 'standard' table (310.16), but you might even have to derate for heat (in the sun), as you wpould were they over a rooftop.

I believe the 2008 also would require this MC to be in a waterproof jacket as well.


#190286 - 11/10/09 02:51 PM Re: MC cable supported by ariel Cable . Amperage rate? [Re: gfretwell]  
Yoopersup  Offline
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310.73 MV : In Isolated CONDUIT in air. So that one I;m pretty sure of.
310.18 LV : Not sure of?


#190295 - 11/10/09 05:30 PM Re: MC cable supported by ariel Cable . Amperage rate? [Re: Yoopersup]  
KJay  Offline
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For the 600V, I think you may need to use Table B.310.3 in Annex B, since it specifically mentions type MC cable in free air.
For over 2000V though, with three conductors, I believe you could use table 310.71, since IMO, the MC jacket is not actually a conduit or raceway as defined in Art.100.


#190297 - 11/10/09 06:54 PM Re: MC cable supported by ariel Cable . Amperage rate? [Re: KJay]  
KJay  Offline
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I probably should have said you may want to use Table B.310.3 in Annex B.


#190314 - 11/11/09 12:40 AM Re: MC cable supported by ariel Cable . Amperage rate? [Re: KJay]  
sparkyinak  Offline
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Alaska
Just carious, why are you stringing MC on a messager? Or am just interpting something wrong here?


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#190324 - 11/11/09 02:17 PM Re: MC cable supported by ariel Cable . Amperage rate? [Re: sparkyinak]  
Yoopersup  Offline
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Michigan
MC cable on Industrial sites is quite often put on poles to remote pumping stations ect. Both 600v & i;ve even see 15kv in MC on poles.
Yoopersup


#190326 - 11/11/09 02:25 PM Re: MC cable supported by ariel Cable . Amperage rate? [Re: Yoopersup]  
gfretwell  Offline


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I have never seen it before either, which tends to explain my silly answer above, sorry for the confusion. wink


Greg Fretwell

#190330 - 11/11/09 04:58 PM Re: MC cable supported by ariel Cable . Amperage rate? [Re: gfretwell]  
Yoopersup  Offline
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mc cable 330.10 (B)4.

Installed outside of buildings or structures or as aerial cable.
type mc cable installed outside of buildings or structures or as aerial cable shall comply with 225.10,396.10,& 396.12.


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