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MC cable supported by ariel Cable . Amperage rate? #190283
11/10/09 01:07 PM
11/10/09 01:07 PM
Y
Yoopersup  Offline OP
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Joined: Mar 2003
Posts: 849
Michigan
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 02:21 PM
11/10/09 02:21 PM
G
gfretwell  Offline

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Joined: Jul 2004
Posts: 9,290
Estero,Fl,usa
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 02:47 PM
11/10/09 02:47 PM
renosteinke  Offline
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Joined: Jan 2005
Posts: 5,316
Blue Collar Country
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 02:51 PM
11/10/09 02:51 PM
Y
Yoopersup  Offline OP
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Joined: Mar 2003
Posts: 849
Michigan
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 05:30 PM
11/10/09 05:30 PM
K
KJay  Offline
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Joined: Nov 2007
Posts: 763
MA, USA
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 06:54 PM
11/10/09 06:54 PM
K
KJay  Offline
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Joined: Nov 2007
Posts: 763
MA, USA
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
11/11/09 12:40 AM
11/11/09 12:40 AM
S
sparkyinak  Offline
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Joined: Jul 2007
Posts: 1,335
Alaska
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 02:17 PM
11/11/09 02:17 PM
Y
Yoopersup  Offline OP
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Joined: Mar 2003
Posts: 849
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

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

Member
Joined: Jul 2004
Posts: 9,290
Estero,Fl,usa
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 04:58 PM
11/11/09 04:58 PM
Y
Yoopersup  Offline OP
Member
Joined: Mar 2003
Posts: 849
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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