800 amp Residential Service
- Thread starter gigawatt
- Start date
- Status
- Location
- Massachusetts
These are not parallel runs as they are only joined on one end.
You will need at least 4/0 for each panel.
You will need at least 4/0 for each panel.
mcclary's electrical
Senior Member
- Location
- VA
And keep in mind, (4) panels fed with 4/0 would not be a true 800 amp service. Rather, a 640.
- Location
- Massachusetts
Did you mean 720?
mcclary's electrical
Senior Member
- Location
- VA
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
90C can only be used for derating. The ampacity is determined by the weakest link which is the 75C terminals.
jbelectric777
Senior Member
- Location
- NJ/PA
is that 800 for a multi dwelling?
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
I don't think so since they are being feed from a CT cabinet. I have done one home that had a 1200 amp service.
Ridiculous but that's what it took.hardworkingstiff
Senior Member
- Location
- Wilmington, NC
I don't think so since they are being feed from a CT cabinet. I have done one home that had a 1200 amp service.
WOW, it really took a 1200-amp service? That's not a home, it's a hotel, lol.
- Location
- Massachusetts
My old bosses home ............ 26,000 Sq ft. :roll:
hardworkingstiff
Senior Member
- Location
- Wilmington, NC
How many people lived in it?
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Well the entire estate was fed from the 1200 amp service. The house had 600 amps for a 7,000 sq. ft home- probably 400 amps would have worked but originally it was all electric heat. There was a 4,000 sq.ft car museum with a 400 amp feeder. A huge conservatory that was conditioned- 200 amp feeder. A swimming pool with cabana- kitchen and all- 200 amps. Tennis courts and gazeebo-- 200 amps and a utility type garage where the generator and panels hid. In all there were, I believe, 13 heating/cooling systems on the estate- not counting the hydro floor heat in part of the home.
When I wired the museum we used a graphic eye system. The dimming panel alone cost me $13,000. I think the entire museum with 400 amps 3 heating systems and about 60-- 8' tracks with a 150 or so heads, ran about $90,000. And he got off cheap.
I think I got it all. :grin:
- Location
- Massachusetts
2 adults, 2 children.
hardworkingstiff
Senior Member
- Location
- Wilmington, NC
hardworkingstiff
Senior Member
- Location
- Wilmington, NC
Did PoCo feed just one service to 1 building?
What voltage/phase?
Must be some large feeders to compensate for voltage drop (if the property has only 1 transformer).
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
One service to one building. The rest was trenched to the other buildings.
240 single phase.
- Location
- Massachusetts
Indoor pool, large Gym, teenager lounge with pinball and video machines, wine room, large home theater for many guests, gentlemens lounge, seven bay garage and mechanical spaces. That was the lower level, I never made it up to the other floors. :roll:
I know the mudroom had a shower stall designed for the dogs, nicer tile than most folks have in a master bath. :roll:
Jim W in Tampa
Senior Member
- Location
- Tampa Florida
So does the OP actually have 1 service or 4 ? If only connected at transformer this looks like 4 services
- Location
- Massachusetts
That really is a good point and it would be prohibited if not for Exception 2 of 230.40.
Jim W in Tampa
Senior Member
- Location
- Tampa Florida
Looks like the cheap way out would be 4 conduits of 4/0 unless he gets into derating when they pass through the CT.
Not sure if material wise and labor if thats cheap way out.
Not sure if material wise and labor if thats cheap way out.
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