How many circuits and amperage needed for my attached garage workshop?
#1
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How many circuits and amperage needed for my attached garage workshop?
I need help figuring out what kinds of circuits to add to my garage.
I'm setting up my workshop in my attached garage. The garage is currently wired with one 15a circuit. I will have at least 5 power tools (drill press, table saw, compressor, etc.) and plan to add additional circuits. My circuit box has three open slots. I'll leave the 15a to power the lights and garage door.
Here's my question - would adding three 20a circuits be good for my setup (all tools will not be used simultaneously) OR would a sub-panel be a better choice (even though more expensive)? Also, if I stick with just adding three more circuits, does it make sense to add 30a instead of 20a?
Thanks for the advice.
I'm setting up my workshop in my attached garage. The garage is currently wired with one 15a circuit. I will have at least 5 power tools (drill press, table saw, compressor, etc.) and plan to add additional circuits. My circuit box has three open slots. I'll leave the 15a to power the lights and garage door.
Here's my question - would adding three 20a circuits be good for my setup (all tools will not be used simultaneously) OR would a sub-panel be a better choice (even though more expensive)? Also, if I stick with just adding three more circuits, does it make sense to add 30a instead of 20a?
Thanks for the advice.
#2
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I think 20 amps is the limit on a 120 volt circuit. I would think 3 20 amp circuits would suffice but do you foresee the possibility of any 240 volt tools down the road?
#3
would adding three 20a circuits be good for my setup (all tools will not be used simultaneously) OR would a sub-panel be a better choice (even though more expensive)?
Also, if I stick with just adding three more circuits, does it make sense to add 30a instead of 20a?
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The tools are table saw-15a, 3/4 hp drill press, miter saw-15a, band saw-2.5a, air compressor (don't have yet), shop vac.
Also, I will use one of the circuits to power outdoor lighting...at most 2000w.
Also, I will use one of the circuits to power outdoor lighting...at most 2000w.
#8
I would Install a 20A MWBC. The 2000W of Lights will need to be on their own 20A circut. If they are Low Voltage you will also have to account Transformer losses and Power factor.
#9
I agree with ibpooks. Install a small subpanel and feed it with 240 volt and 30 - 60 amps. This will give you a great deal of flexibility now and in the future for adding other circuits as needed. As a bonus you will only use two spaces in your main panel. A sub panel will only run about $40-50 plus the wire and the breaker.
#11
BTW, 2000W of lighting at a "shed" would be bright enough to peel paint. You can probably get by with much, much less than that.
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The outdoor lights will mostly be for landscaping and the seasonal xmas lights.
Can anyone give me a ballpark on the going rate to have a 240w sub-panel added and line run through pipe (exterior of drywall) and across my 3 car garage ceiling? The breaker is outside, on the left side of the garage and the panel would need to be on the opposite side of garage about 30' away. I think one could just punch the new line through the back of the existing breaker and through the interior garage drywall, then routed up over and back down.
Can anyone give me a ballpark on the going rate to have a 240w sub-panel added and line run through pipe (exterior of drywall) and across my 3 car garage ceiling? The breaker is outside, on the left side of the garage and the panel would need to be on the opposite side of garage about 30' away. I think one could just punch the new line through the back of the existing breaker and through the interior garage drywall, then routed up over and back down.
#15
Can anyone give me a ballpark on the going rate to have a 240w sub-panel added and line run through pipe (exterior of drywall) and across my 3 car garage ceiling? The breaker is outside, on the left side of the garage and the panel would need to be on the opposite side of garage about 30' away. I think one could just punch the new line through the back of the existing breaker and through the interior garage drywall, then routed up over and back down.
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Based on what you said earlier: "I would Install a 20A MWBC. The 2000W of Lights will need to be on their own 20A circut. If they are Low Voltage you will also have to account Transformer losses and Power factor."
I don't think I'll need too many, maybe 4 or 5 slots of 20a each.
I don't think I'll need too many, maybe 4 or 5 slots of 20a each.
#17
ok. I'll do my best here.
The big box orange has 6 space panels for less than $20.
10AWG THHN is about 27C/ft, however you may have to buy a spool as they do not cut it at my supply house.
a 3/4'' stick of EMT is a little under $3.
My supply house carries prebent pieces for a buck or two.
Breakers cost around $5 for a single pole and $10 for a double pole.
The big box orange has 6 space panels for less than $20.
10AWG THHN is about 27C/ft, however you may have to buy a spool as they do not cut it at my supply house.
a 3/4'' stick of EMT is a little under $3.
My supply house carries prebent pieces for a buck or two.
Breakers cost around $5 for a single pole and $10 for a double pole.