Alwayslearningelec
Senior Member
- Location
- NJ
- Occupation
- Estimator
How would I know this at the time of bid?
Feeder Terms
- Thread starter Alwayslearningelec
- Start date
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Say you ran 750 kcmils when the terminals are the end are only 600 kcmils. You can splice on 600 kcmils not longer than the splice box distances provided.
HarrySlother
Member
- Location
- Iowa
- Occupation
- Electrical Engineer
Get gear quote. That'll tell you the lug sizes. You can possibly get larger lugs in some spots if needed, and if you know what sizes you need.
Perhaps the engineer already calculated V.D. and upsized feeders. So look through the drawings; if any feeders are larger than they typically would be, double check the lug sizes will work.
Perhaps the engineer has NOT calculated V.D. on feeders. Sometimes they are lazy make you do it; they may have a general note or spec that says something like "Contractor to calculate V.D. and upsize feeders to limit V.D. to 3%". In that case you'd have to calculate and upsize them yourself.
Perhaps the engineer already calculated V.D. and upsized feeders. So look through the drawings; if any feeders are larger than they typically would be, double check the lug sizes will work.
Perhaps the engineer has NOT calculated V.D. on feeders. Sometimes they are lazy make you do it; they may have a general note or spec that says something like "Contractor to calculate V.D. and upsize feeders to limit V.D. to 3%". In that case you'd have to calculate and upsize them yourself.
- Location
- Illinois
- Occupation
- retired electrician
When designers upsize the ungrounded conductors, they often forget about 250.122(B), especially if the wiring method is a cable wiring method.