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MC cable supported by ariel Cable . Amperage rate? #190283 11/10/09 12:07 PM
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Yoopersup Offline OP
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600 volt three conductor (310.20??), or 4160 three conductor(310.73??) either with messager.
Yoopersup

2017 / 2014 NEC & Related Books and Study Guides
Re: MC cable supported by ariel Cable . Amperage rate? [Re: Yoopersup] #190284 11/10/09 01:21 PM
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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
Re: MC cable supported by ariel Cable . Amperage rate? [Re: gfretwell] #190285 11/10/09 01:47 PM
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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.

Re: MC cable supported by ariel Cable . Amperage rate? [Re: gfretwell] #190286 11/10/09 01:51 PM
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Yoopersup Offline OP
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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?

Re: MC cable supported by ariel Cable . Amperage rate? [Re: Yoopersup] #190295 11/10/09 04:30 PM
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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.

Re: MC cable supported by ariel Cable . Amperage rate? [Re: KJay] #190297 11/10/09 05:54 PM
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KJay Offline
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I probably should have said you may want to use Table B.310.3 in Annex B.

Re: MC cable supported by ariel Cable . Amperage rate? [Re: KJay] #190314 11/10/09 11:40 PM
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sparkyinak Offline
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Just carious, why are you stringing MC on a messager? Or am just interpting something wrong here?


"Live Awesome!" - Kevin Carosa
Re: MC cable supported by ariel Cable . Amperage rate? [Re: sparkyinak] #190324 11/11/09 01:17 PM
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Yoopersup Offline OP
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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

Re: MC cable supported by ariel Cable . Amperage rate? [Re: Yoopersup] #190326 11/11/09 01:25 PM
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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
Re: MC cable supported by ariel Cable . Amperage rate? [Re: gfretwell] #190330 11/11/09 03:58 PM
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Yoopersup Offline OP
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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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