Residential Garages??

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Dustin Foelber

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Morning Gentlemen
I have a residential property where the have to (2) 950 sq ft garages. (1) garage is converted to a work shop with multiple saws, sanders, compressors,etc., as well as an office and upstairs storage. The other is a more storage/parking but does have a kitchen and a small office. For my load calcs where do these loads come into play. I am having a hard time finding anything in 220.

Thank You
Dustin-H.I.C. Electric
 
Dustin Foelber said:
Morning Gentlemen
I have a residential property where the have to (2) 950 sq ft garages. (1) garage is converted to a work shop with multiple saws, sanders, compressors,etc., as well as an office and upstairs storage. The other is a more storage/parking but does have a kitchen and a small office. For my load calcs where do these loads come into play. I am having a hard time finding anything in 220.

Thank You
Dustin-H.I.C. Electric
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225 Outside feeders and branch circuits
 
Is this is for your own use,
(2) 950 sq ft garages x .5VA per square foot (without subtracting the offices/kitchens etc though you should)

(1) garage is converted to a work shop with multiple saws, sanders, compressors,etc., - get some specifics about what they're running

as well as an office and upstairs storage. The other is a more storage/parking but does have a kitchen and a small office.
I'd figure 3 VA per square foot for this space, and tack on 1500VA for every SABC you got.

You will come to a ridiculously low number, go with 200A for both buildings to use.
 
Yes, I have taken nameplate loads on all equipment. I have to submit this to our utility. Is the .5 VA per sq ft apply to this or do I go with Art 225 which references me back to 220 III?
 
Are you looking to put a new service on the garages?

I would figure both units @ 3va per sqft just keep it simple, rather than figure the office space seperate so on and so forth. The total va for the two units is 5,700. Or use the actual connected lighting load.

Follow the steps to do a non-dwelling calculation.
Largest motor @ 125% plus all other motors and loads. ( usa table 430.248-250)

Treat the Kitchen according to 220.56

general use plugs at 180 va each.

Heat, or A/C.

I know the 3va is overkill but it is only 20 amp's @ 240 volts anyway. I'm sure your connected load is bigger.

But as mentioned before a 200 amp service would be my recomendation.
 
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