wire ?

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  #1  
Old 09-18-06, 04:34 AM
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wire ?

I have 100 amp service cable that the electric company uses to go from pole to house. I'm sure it's aluminum. I'm thinking about using it to run from my main service panel to supply my garage 100 ft. away. I want to run it under ground through conduit. Would it be ok to use this particular cable in this way?
Thanks

Gerald
 
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  #2  
Old 09-18-06, 06:42 AM
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If you're talking about the spiral wound cable that has 2 insulated conductors and a bare ground wire, you CAN NOT use it for a feeder. It's not listed for that kind of use.
It would be a violation of the Electrical Code.
Does it have any markings on it?
steve
 
  #3  
Old 09-18-06, 09:35 AM
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What size is it? Air-cooled overhead feeders are often smaller than underground feeders need to be.
 
  #4  
Old 09-18-06, 10:04 AM
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It's smaller than my entrance cable which is 100 amp so it's probably for 60 amp service. There is nothing written on it. I don't think I'll use it.

Thanks

Gerald
 
  #5  
Old 09-18-06, 10:47 AM
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Good idea (not to use it).
The concern (other than not being permitted by the electrical code) is the insulation on the wire is probably not rated for use inside a residence. That means the insulation is not flame retardant and will not suppress combustion. If it catches on fire, it will burn and give off poisonous fumes. The service drop cable used (by the POCO) around my area is normally #2 aluminum.
Per the National Electrical Code,
310.8(C) Wet Locations....
Insulated conductors and cables used in wet locations shall be
(1) Moisture-impervious metal sheathed
(2) Types MTW, RHW, RHW-2, TW, THW, THW-2, THHW, THHW-2, THWN, XHHW, XHHW-2, ZW; or
(3) Of a type listed for use in wet locations.
In a conduit underground is considered a wet location.
If the cable has no markings that match the ones listed, it can't legally (per code) be used for what you propose.
The electrical inspector won't (or shouldn't) pass it.
steve
 
  #6  
Old 09-18-06, 12:01 PM
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Scrap wire prices are up again this week.
 
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