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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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Michigan
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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Michigan
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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Posts: 1,313
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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Posts: 822
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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Joined: Mar 2003
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Michigan
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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