over head alluinum wire

[GPT]

is it possible to run 5 wire 3 phase from one building to another on the load side of service.

 

[augie47]

Sure. Restrictions and requirements are in Art 225.

 

[GPT]

is it possible to run 5 wire 3 phase from one building to another on the load side of service.

do they make something larger than quad plex

 

[augie47]

I have not seen it on the market, but I have seen a 5th condcutor added.

 

[GPT]

is it possible to run 5 wire 3 phase from one building to another on the load side of service.

would 310.20 apply where it says not more than 3 single insulated conductors supported on a messenger.

 

[augie47]

You are opening a whole new can of worms.
In everyday applications, I see quad-plex with a conductor added, if needed and the manufacturer ampacites of quad used,
If we really get down to brass tacks, most quad (or triplex) used as feeders is actually a "covered" wire and not insulated, so the insulation listed in 310.20 are not applicable.
If it is critical, I'd say you might end up with engineering documentation needed.

 

[GPT]

is it possible to run 5 wire 3 phase from one building to another on the load side of service.

nope it is not critical. just wondering thanks for your help.

 

[augie47]

There are some good questioins there for discussion. I just don't know the answers.
The "accepted" installations seem to ignore many of the actual Code issues