208 single phase load calcs

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LarryFine

Master Electrician Electric Contractor Richmond VA
Location
Henrico County, VA
Occupation
Electrical Contractor
Stal, welcome to the forum! :)

Simply put, a 208v line-to-line load is like any other: the line current is the load current.
 

stalbott1

Member
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Question

So if i had a load of 4356W on a 208/1 phase system would I do this?

4356/208/2 = 10.47A x 120V = 1256.5VA per phase?
 

LarryFine

Master Electrician Electric Contractor Richmond VA
Location
Henrico County, VA
Occupation
Electrical Contractor
So if i had a load of 4356W on a 208/1 phase system would I do this?

4356/208/2 = 10.47A x 120V = 1256.5VA per phase?
Nope. Leave out the "/2" and the "120v". It is a single 2-wire circuit.

The load IS 4356va. The current in each line, and the load, is (4356/208) 20.94a.

Lines don't divide the current between them. Each line carries the entire load current.
 

Smart $

Esteemed Member
Location
Ohio
Thank you Larry! I thought I was off there on something. Have a great day.:)
Be forewarned that adding 208 1? line-to-line loads, connected to the other line on a 3? system, will change the calculation a bit...


Welcome to the forum :)
 
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