600volt to 208

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jamieb

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I'm changing out parking lot lighting from 600volt to 208 volt ( 480 not an option ) existing lighting is wired a-b, b-c, and c-a down the line, this may sound stupid but will i run into any problems with just a straight change-out of lamps and ballasts and using existing conductors ( trans. will be 600d down to 208y )....thanks
 

augie47

Moderator
Staff member
Location
Tennessee
Occupation
State Electrical Inspector (Retired) DINOSAUR
If you are replacing all, you are going to be increasing your current by better than 2 fold so conductor ampacity and voltage drop may be a major issue.
 

LarryFine

Master Electrician Electric Contractor Richmond VA
Location
Henrico County, VA
Occupation
Electrical Contractor
... trans. will be 600d down to 208y ...
Aside from the current concerns mentioned above, it should work fine with 208v-rated ballasts. You'll effectively have Delta loads.

While you can, and probably should, bond the secondary neutral, you won't need to run it to the lights, just the usual EGC.
 
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