Originally Posted By: bsarles This post was automatically imported from our archived forum.
Help Please–I inspected a huge house and it had 3 panels,one i new was 100 amp sevice but the other two panels had 3 main lugs and 1 lug for the white nuetral. I was able to read the wire size which said 3/0 awg and was copper on those two panels. What would the amps be and the volts?
Originally Posted By: pdacey This post was automatically imported from our archived forum.
Benjamin,
The resident sparkies will be able to give you a more detaild answer than me.
3/0 copper is rated for 200 amps. If the panels have 4 feeder cables as you decribed, they would be equipment (sub) panels. Not service entrance (main) panels. What was the breaker configuration in these panels?
Originally Posted By: bsarles This post was automatically imported from our archived forum.
Im not sure what u mean by configuration. The panels in ? had 150 amp breakers but according to my HI electrical bookand it only goes to 2/0 awg in copper and it reads that would be 200 amp.
Be very careful if you do not fully understand the installation, and possibly recommend further evaluation by a professional if the installation is beyond your experience ...... In the meantime perhaps you could post some pics and descriptions of the installation that can be kicked around to help you understand better ... 
Just my opinion and 2-nickels ...
-- Robert O'Connor, PE
Eagle Engineering ?
Eagle Eye Inspections ?
NACHI Education Committee
I am absolutely amazed sometimes by how much thought goes into doing things wrong
Originally Posted By: jtedesco This post was automatically imported from our archived forum.
Robert:
I should have said "official code text", I did not want to criticize the information you posted. The actual text and table provides additional valuable information.
Originally Posted By: roconnor This post was automatically imported from our archived forum.
Okay Joe. I just find that table I referenced very handy, and it also has the Branch Circuit and Service Conductor sizes for typical residential wiring side by side to make the differences crystal clear. Plus it’s from the CodeCheck series, which I think is the most widely used code reference for home inspectors …
– Robert O’Connor, PE
Eagle Engineering ?
Eagle Eye Inspections ?
NACHI Education Committee
I am absolutely amazed sometimes by how much thought goes into doing things wrong
Originally Posted By: tallen This post was automatically imported from our archived forum.
I was at a service center the other day , and noticed that there service drop was probably #2 triplex, but it was feeding an 800 amp (WAG) service. It looked like parellel 500 MCM.
Looking at it would make you think the utility was nut's, but like I mentioned they have thier own way of determining loads.
I will take a picture of it in the next couple of day's and post it.
It is a prime example of the diference between " free air" conductors, and
SE.
-- I have put the past behind me,
where , however, it now sits, making rude remarks.
