Ask Experts Questions for FREE Help !
Ask
    electrick33's Avatar
    electrick33 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Apr 4, 2010, 04:41 PM
    How to size a sub panel in my garage
    I have a 100 amp panel in the house and I have to run 30 feet to my garage and I need a 20 amp for the compressor one 20 amp for a welder and a 15 amp for lights and a 20 amp for 8 recpeticals I do have #4 aluminum will this work for a 50 amp sub panel or what size sub do I need to have
    cdad's Avatar
    cdad Posts: 12,700, Reputation: 1438
    Internet Research Expert
    		  
    #2

    Apr 4, 2010, 06:04 PM

    Are the compressor and welder 220v? If so your exceeding the limit by about 7 amps. The 2 20 amp 220v sockets would take 40 of the amps your sending there. That leaves 10 amp 220 or 20 amp 110. You need to either share a plug between compressor and welder or set sites a little lower.
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #3

    Apr 4, 2010, 06:48 PM
    Quote Originally Posted by califdadof3 View Post
    Are the compressor and welder 220v? If so your exceeding the limit by about 7 amps. The 2 20 amp 220v sockets would take 40 of the amps your sending there. That leaves 10 amp 220 or 20 amp 110. You need to either share a plug between compressor and welder or set sites a little lower.
    Can you explain this a bit? Your logic here is not really accurate.

    You do not add up the circuits. What "limit" is being exceeded?

    Two 20A circuits does NOT "take up" 40 amps.
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Attached garage sub panel wire type and size [ 18 Answers ]

Hello I am getting down to wiring the garage now for lights plugs and 50amp welder. In earlier posts I received a lot of well appreciated information on my 100 amp sub panel in the basement taken from the tap box I installed above the 200 amp main disconnect. Thanks again to Tkrussell,...

Sub Panel AMP Size and Supply Wire Size [ 1 Answers ]

I would like to install a sub panel in my garage I was told to run 6/3 Romex to supply the sub panel and have done so. The run is about 65 feet and I am now wondering after reading this site what is the max I can get for this size wire? I plan to supply a compressor (20 amp) and the garden...

Wire Size and panel size [ 6 Answers ]

I have a separate small living quarters that is a single room that is about 180 feet away from the main panel. It is going to get another little bed room a small kitchen and a bathroom also maybe a washer. The main panel is a 100 amp meter socket combo. What should I upsize the main panel to? ...

Breaker size in main panel to support sub panel? [ 7 Answers ]

Hello, I am wiring a sub-panel to the outside of my home (50 feet from main 200 amp box). I ran 3 wire - 6 gauge. What is the largest 2 pole breaker I can put in the main panel to supply the sub-panel. TYPE NM-B 6-3 WITH GROUND 600 VOLTS CIRTEX-I EZ-STRIP (R) PLUS 17:11 2/5/07 SB/RC ...

Sub panel for garage/addition [ 24 Answers ]

Hey guys I am working on an addition to my home and was hoping to get some advice on the sub panel I plan on installing in the new garage. The existing house is 200 amp service and about 3500sq/ft. I will be adding an additional 1800 and will include the following: 2 half baths 2 full baths 2...

View more questions Search