pipe size for 3 - #2 entrance wires?

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Old 12-05-06, 06:59 PM
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pipe size for 3 - #2 entrance wires?

Hi,

What size conduit would be required for 3 - #2 entrance cables? Just curious, I'm going to have an electrician do the work, but I might be able to get some parts in advance.
 
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Old 12-05-06, 07:26 PM
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Is this for the meter mast or meter to main panel disconnect enclosure? And what kind of conduit RMC, pvc, emt?

Roger
 
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Old 12-05-06, 08:25 PM
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one other thing to consider as well. In my area, the POCO requires a minimum 3" conduit for underground feeds to the meter.

your POCO may have similar restrictions depending upon your application.
 
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Old 12-05-06, 08:54 PM
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Thanks NAP I forgot to include a lateral feed.

Roger
 
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Old 12-05-06, 09:05 PM
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This would be EMT from the (new) weatherhead to the (maybe new) meter socket to a main panel, with 125A mains. I believe that it would be 3 - #2 conductors. I've got an electrician that's going to do the work; I'd just like to prepare a little.
 
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Old 12-06-06, 07:55 AM
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For EMT 1-1/4" will give you 23.23% fill. For some reason I thought masts needed to be rigid, though.

I'm certainly no pro, so take this info as such. :-)
 
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Old 12-06-06, 08:47 AM
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If the service mast is for an overhead drop and extends above the roof line (eave) it will most likely always be required to be rigid galv. metal conduit with guy wiring. There will be specific requirements from the utility. Check there web-site for info. Usually the mast must be 2" rigid galv. metal or larger regardless of service drop wire size.
If the mast remains below the roof line and attached to the dwelling outer wall then rigid, emt or even sch 80 or 40 pvc maybe allowed.

If lateral feed then usually sch 80 from ground level to meter or rigid galv. metal. Again a specific minimum size will be required by the utility regardless of wire size.

Meter to the main panel disconnect can be any approved conduit or raceway.

#2 Copper or 1/0 aluminum for service entrance wire is good for 125 amps.

As for conduit size from meter to the main panel I'd just install a conduit that would allow upgrade to 200 amps. 1 1/2" RMC, EMT or PVC would suffice for 3 wire feeds with most se wiring insulations. Which to a degree is why the utilities spec 2" or greater on the line side of the meter.

Roger
 
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Old 12-06-06, 02:38 PM
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Thanks for the info, it's just what I wanted to know.
 
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