Calculate Circuits

[Alwayslearningelec]

Ok, I have the wattage of the fixture, the quantity and know it's being feed from a 120/208 panel. How can i figure wire size and quantity of circuits?

Thanks.

 

[jumper]

Are these flourescents or HID? If so, lamp wattage will not equal ballast amperage.

 

[Alwayslearningelec]

Flourescent. and it says 4pin 75w lampholder.

 

[jumper]

In general the lamp wattage is useless to me, I need the actual amperage of the ballast.

Looking at a few general specs, I see 1800 Watts or 2000 VA, pf must be a concern for the EE.

 

[Alwayslearningelec]

http://www.bega.com/inhalte/produkt_produkt.php?produkt=2033

This is the fixture.

 

[wiigelec]

Use the rated current of the fixture, otherwise:

P=V*I => I=P/V

Calculate current per fixture then use the current to determine branch circuit ratings and number of fixtures per circuit...

 

[Alwayslearningelec]

Thanks. If I want to learn calculation which MH book would be best. I assume his calculations book

 

[Smart $]

http://www.bega.com/inhalte/produkt_produkt.php?produkt=2033

This is the fixture.

There is no 75W-lamp fixture listed on that web page...???

The "produkt=2033" of your URL is a 60W incandescent fixture.