wire size

[Dave Maxwell]

Wondered about that. Saw it on Menards site

[IONH]

Originally Posted by pattenp

Dave, I assume you are running this wire in conduit underground. If so, you should consider Mobile Home Feeder. The sizes are limited and 2/0-2/0-2/0-1 or 2/0-2/0-1-4 is what I think you could get to handle the full 100A. The 2/0 will give you up to 135A if needed and it should fit in a 100A breaker.
See this on MHF...

http://www.southwire.com/ProductCata...prodcatsheet15


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Wow, 500ft package. Where would someone get a bundle like that in shorter lengths? What would the home/garage interior "in wall" alternate be for the 2/0-2/0-2/0-1 be since the wire you linked I believe is for outside use?

[Dave Maxwell]

I assume since it says 2 2 2 4 it has 3 main leads and one ground. Why is it only $1 something per foot and single 2 copper is 3 per foot

[IONH]

Originally Posted by Dave Maxwell

I assume since it says 2 2 2 4 it has 3 main leads and one ground. Why is it only $1 something per foot and single 2 copper is 3 per foot

What pattenp linked was aluminum, not copper.

[pattenp]

MHF can be run inside to a panel if in conduit. Supply houses and big box stores will sell it by the foot. The alternate would be to switch to SER cable inside which can be run without having to use conduit.

This is SE cable...
http://www.southwire.com/ProductCata...rodcatsheet273
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Originally Posted by IONH

Wow, 500ft package. Where would someone get a bundle like that in shorter lengths? What would the home/garage interior "in wall" alternate be for the 2/0-2/0-2/0-1 be since the wire you linked I believe is for outside use?

[IONH]

Originally Posted by pattenp

MHF can be run inside to a panel if in conduit. Supply houses and big box stores will sell it by the foot. The alternate would be to switch to SER cable inside which can be run without having to use conduit.

What gauge SER cable would be the equivalent sizing to the 2/2/2/1 cable?

Which would you recommend? Not to hijack, but my span is probably only 20 feet exterior to a building and another 80 or so interior (total within both buildings from panel to panel).

[pattenp]

The sizes are the same between the two cables. Are you wanting #2 or #2/0? What's the amp rating you need? The reason I ask is 2-2-2 comes with a #4 ground not #1. 2/0-2/0-2/0 comes with #1 ground.

[IONH]

I don't want to hijack the thread, I'll PM you pattenp.

[Dave Maxwell]

100 amp. I knew the other was aluminum but didn't realize so much different in price

[pattenp]

The big advantage of aluminum is the price. Copper has gotten so expensive.

[Dave Maxwell]

Aluminum still good or outdated

[pattenp]

I would only use aluminum for large and long feeds. The aluminum alloy in wire has been improved greatly over the aluminum in wire from years ago. Aluminum wire is certainly not outdated.

[Wastedwagesracing]

Dave contact Sam at 'sales@nassauwireandcable.com' I just bought 250' of aluminum 4/0 4/0 2/0 with a #6 ground free shipping. Cheaper than I could touch it locally for.

[MrMark]

This thread here seems to state that the enclosure is the bottleneck and that when you mount these dual marked 60/75 breakers together that you must default to the 60 degree rating

http://forums.mikeholt.com/showthread.php?t=81811

This is consistent with what PHR posted here.

I believe you would need #2 copper, not 3 as has been posted.

http://database.ul.com/cgi-bin/XYV/t...569&sequence=1

Suprising that no one other than PHR has ever mentioned this.

[Dave Maxwell]

I'm sorry, but your question is not real clear. Does 2 2 2 4 mean 2/0, 2/0, 2/0 & #4 ground? Does it mean #2, #2, #2, #4 awg wire size? Without knowing what your load is on your existing panel and the size of your existing panel and what size your existing service wires are, it is not possible for me to answer your question. You will need to have your electrician come to your house, calculate your existing loads and check against your existing service feeders to determine if your wire size is of sufficient size to handle the added loads that will be applied to your old panel from the new storage shed loads. Your electrician will need to calculate the loads your anticipating from the storage shed also.

I'm sorry this is the best I can do fo

That is the response I got about the mobile home feed from county on legality. How do I calculate that stuff.

[pattenp]

I don't know about the UL rating of only being 60 degrees, but my Cutler Hammer panels have listed on the sticker 60/75.

Originally Posted by MrMark

This thread here seems to state that the enclosure is the bottleneck and that when you mount these dual marked 60/75 breakers together that you must default to the 60 degree rating

http://forums.mikeholt.com/showthread.php?t=81811

This is consistent with what PHR posted here.

I believe you would need #2 copper, not 3 as has been posted.

http://database.ul.com/cgi-bin/XYV/t...569&sequence=1

Suprising that no one other than PHR has ever mentioned this.

[pattenp]

Too much to explain here. You'll need to do a search on the web for "How to calculate electrical loads", and do a lot of reading.

Originally Posted by Dave Maxwell

I'm sorry, but your question is not real clear.
Does 2 2 2 4 mean 2/0, 2/0, 2/0 & #4 ground? Does it mean #2, #2, #2, #4 awg wire size? Without knowing what your load is on your existing panel and the size of your existing panel and what size your existing service wires are, it is not possible for me to answer your question. You will need to have your electrician come to your house, calculate your existing loads and check against your existing service feeders to determine if your wire size is of sufficient size to handle the added loads that will be applied to your old panel from the new storage shed loads. Your electrician will need to calculate the loads your anticipating from the storage shed also.

I'm sorry this is the best I can do fo

That is the response I got about the mobile home feed from county on legality. How do I calculate that stuff.

[MrMark]

Originally Posted by pattenp

I don't know about the UL rating of only being 60 degrees, but my Cutler Hammer panels have listed on the sticker 60/75.

I'll have to look at mine too but for most people who are going to have at least one older panel they are looking at 60 degrees.

[Aceman]

Originally Posted by pattenp

I don't know about the UL rating of only being 60 degrees, but my Cutler Hammer panels have listed on the sticker 60/75.

Pattenp, straight from UL, taken from here:

http://www.ul.com/global/documents/o...BreakersMG.pdf

20. 60/75°C Wire — All circuit breakers rated 125 A or less are marked for use with 60° C,
60/75°C or 75°C only wire. This marking indicates the proper wire size for termination in
accordance with Table 310.15(B)(16) of the NEC . It is acceptable to use wire with a higher
insulation rating if the ampacity is based on the wire temperature rating marked on the breaker. For
breakers rated more than 125 A, the proper wire temperature rating is 75°C and it is optional for the
breaker to bear this marking.

[Dave Maxwell]

Was told by local electrician that aluminum shouldn't be used underground. Copper is going to cost me close to 5,000 just in wire