michalspike
Senior Member
- Location
- brooklyn, new york
Have a job. It was commercial building, now they make it as a residential.
I'm running new wire from disconnect at the basement to the panel at 12 floor. Dropping riser thru old shaft to basement and across basement to "electrical room" aprox. 250 feet. I got a engineer drawing specify 3PH 100AMP 4 sets of 1/0 wire. Because they don't have a enough gas there, Engineer specify 2 electric water heaters 6000W non-simulataneous operation(i'm not sure if this will work for residential). After last meeting they want to upgrade services to 3PH 200AMP. After approved price i went to order MC wire 4 sets of 4/0 to drop riser to basement and in the basement i will use pipe. I got call from my contractor that engineer don't want to go with 200 Amp now, He just want upsize it to 3PH 125Amp now witch is a 1/0 wire. Can i drop my 4/0 riser to basement and downsize wire to 1/0?
I'm running new wire from disconnect at the basement to the panel at 12 floor. Dropping riser thru old shaft to basement and across basement to "electrical room" aprox. 250 feet. I got a engineer drawing specify 3PH 100AMP 4 sets of 1/0 wire. Because they don't have a enough gas there, Engineer specify 2 electric water heaters 6000W non-simulataneous operation(i'm not sure if this will work for residential). After last meeting they want to upgrade services to 3PH 200AMP. After approved price i went to order MC wire 4 sets of 4/0 to drop riser to basement and in the basement i will use pipe. I got call from my contractor that engineer don't want to go with 200 Amp now, He just want upsize it to 3PH 125Amp now witch is a 1/0 wire. Can i drop my 4/0 riser to basement and downsize wire to 1/0?
