120/240 VS 120/208 label/listing.

Status
Not open for further replies.
2

220/221

Senior Member
Location
AZ
New three phase service for sale. It is labeled 800 amps, 120/240 by the MFG.

I assume that the components are the same for 120/208 as for 120/240 but since the MFG label says 120/240, can it be used for 120/208 installation (without taking off the tag:cool:)?

I notice that most stock gear is labeled 250V but occaisionally I see a specific 120/240 or 120/208 tag.

Technical foul?
 
2

220/221

Senior Member
Location
AZ
My bad...service equipment for sale.

A supplier of mine wanted my opinion (for some odd reason) and I told him I'd ask someone who knows.




Me? I'd just make a new label at a trophy shop.

208/240.........whatever it takes
 
Former Jeanyus

Former Jeanyus

Member
Location
NW Chicago Suburb
the panel might be specifically for 120/240v 3ph with the high leg, IIRC the bus is constructed so you can't put a 1p breaker on the high leg phase. They cost extra... some areas will allow you to use a 'standard' panel and tag it with 'high leg' or some such wording, but around Chicago some towns are really specific about what panel will be allowed on 240v services.
 
J

jim dungar

Moderator
Staff member
Location
Wisconsin
Occupation
PE (Retired) - Power Systems
Former Jeanyus said:
the panel might be specifically for 120/240v 3ph with the high leg, IIRC the bus is constructed so you can't put a 1p breaker on the high leg phase.
Click to expand...

I do not know of any panel construction that will prevent you from putting a 1-pole breaker into a 3-pole space. however, I have seen panels built with one part of the bus configured and labeled for 3-pole breakers, and another part built and labeled for 1 & 2-pole breakers (the high leg is missing in this part)

FWIW, technically a three phase high leg system should be referred to as 240/120 (I like to include 3P 4W).
 
Status
Not open for further replies.
Top