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An insulated single wire cable (with about 10 bundled copper wires) that is marked 900V and is about 60 feet long will carry how many Amps? I have a sub-panel in my garage that feeds from a 60 amp breaker in the house. The wires in the buried conduit that feed the aux. panel in the garage are nontraditional and have printed on them that they have a 900v capacity. The panel was partially wired but has not been in service since it was installed. I want to know if these wires are safe for carrying the electricity to the garage. Also, I could get a smaller breaker (50 or even 40 amps would be adequate service at present) but would like to have the added capacity for adding some tools (welding equipment and table saw).

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migration rejected from electronics.stackexchange.com Oct 3 '13 at 11:31

This question came from our site for electronics and electrical engineering professionals, students, and enthusiasts. Votes, comments, and answers are locked due to the question being closed here, but it may be eligible for editing and reopening on the site where it originated.

closed as unclear what you're asking by Tester101 Oct 3 '13 at 11:31

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question.If this question can be reworded to fit the rules in the help center, please edit the question.

    
How wide is each strand? –  Ignacio Vazquez-Abrams Aug 6 '13 at 23:29
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The answer to this question depends as much (or more) on building codes than it does on the physics of the situation. The question would be a better fit on DIY.stackexchange.com. I've flagged it to alert the moderators. –  The Photon Aug 6 '13 at 23:30
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Even on DIY, you'll need to specify what is the gage (AWG) or cross-sectional area of the wire. Just knowing there are 10 wires in the bundle tells us very little. The 900 V rating is more about the characteristics of the insulation, and it doesn't indicate at all the ampacity of the wire. –  The Photon Aug 6 '13 at 23:32
    
Finally, a "single wire" will only carry current in one direction... you need a second wire to return current and form a circuit. –  The Photon Aug 6 '13 at 23:41
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Without the OP including the wire gauge, perhaps someone could answer with the minimum gauge required to support a 60 amp service over that distance. –  BMitch Aug 7 '13 at 13:38