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BKitchens

09:18AM | 11/12/02
Member Since: 11/11/02
5 lifetime posts
Bvelectrical
I am finishing my basement and plan to install a 100 amp sub-panel from my 200 amp panel in the Garage via a 100 amp breaker in the main panel. The plan calls for two 220 circuits in my shop for an installed vac system and my table saw, one 220 circuit for a future sauna; two dedicated circuits for a freezer and small refrigerator; two lighting circuits (one for the shop @ 6 flourescent lights and one for the rec room @ 6 75W can lights); and four receptical circuits. I have three questions: Is No. 2 Aluminum 4 wire acceptable for this installation or should I be using No. 2 Copper? I was told that No. 2 copper was only rated at 95 amps, is this true? And lastly, the run from the Main panel to the sub-panel is approximately 65 feet. Does this have to be encased? I was planning to pull it through the wall, the attic of the garage, down through another wall, and into the mechanical room where the breaker panel exists. I do plan to have a licensed electrician look over the installation and make all the final hook-ups.

Tom O

11:10AM | 11/12/02
Member Since: 09/17/02
477 lifetime posts
The #2 aluminum might be acceptable to your local inspector, best to check with him prior to starting any work. There have been several discussions as to what the capacity of #2 aluminum is for residential applications. I hope that Joe will jump in on this one & give us his view for your proposed feeder.

Using #2 copper would avoid any problem with your inspector. If you use #2-3 with ground non-metallic sheathed cable, the ampacity is 95 amps, but there is a rule (240.4(B)(3))that allows you to round this up to 100 amps which is a standard size overcurrent device.

What do you mean by encased?

Tom

[This message has been edited by Tom O (edited November 12, 2002).]

BKitchens

04:18AM | 11/13/02
Member Since: 11/11/02
5 lifetime posts
Thanks for the responses Tom and Joe! I will be submitting a wiring plan for review and approval, but am in the cost investigation stage to determine whether I can afford this project. I was thankful to have found this site. I have reviewed several of the prior posts and felt that the advise obtained here would be more reliable than my local home centers as that is where I have gotten conflicting advise. I have a call into the County Code Office with these same questions but haven't received a call back yet. As far as my question about being encased - I was concerned about the fact that I would be running the cabling through walls and over the top of my garage (ie. fire hazard). Thanks again!

BK

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