Calculated Res. Service comes at 603A

Status
Not open for further replies.
Dennis Alwon said:
If you go with 3- 200 amp panels and 1-100 amp panel it may save a tad bit but personally I would probably go with 4-200 amp panels. Alot cheaper than an 800 amp panel
Click to expand...
Service equipment is likely a meter center though.

Probably comes down to deciding if one goes with two 400 amp units or a single 800 amp unit.
 
ptonsparky said:
How would they expand that would not mean a new service for the additional buildings? Curious. Not meant to be argumentative.
Click to expand...
I have to agree that if it is apartments the load at each dwelling isn't likely to change when it comes to NEC calculations, unless you changed something from gas to electric or added entire new apartment units.
 
Dennis Alwon said:
If you go with 3- 200 amp panels and 1-100 amp panel it may save a tad bit but personally I would probably go with 4-200 amp panels. Alot cheaper than an 800 amp panel
Click to expand...

I don't understand that.
I usually see and do group modular metering out here on the west. Sometimes separated into 2 sections each with a main switch,tenant meters with main breaker.
 
ptonsparky said:
I haven’t done any apartment housing of that size but I would think the loading would be consistent throughout its lifetime. 599 amp Service should be good. Future EV charging would be the changer.
Click to expand...

ptonsparky said:
How would they expand that would not mean a new service for the additional buildings? Curious. Not meant to be argumentative.
Click to expand...

Just my opinion but you mentioned one possibility, the addition of car chargers in the future. Unless the owner asks for the absolute cheapest possible installation adding another 200 amps to the service instead of massaging the calculation seems like a better design to me. I do agree that the apartment load shouldn't really change.
 
infinity said:
Just my opinion but you mentioned one possibility, the addition of car chargers in the future. Unless the owner asks for the absolute cheapest possible installation adding another 200 amps to the service instead of massaging the calculation seems like a better design to me. I do agree that the apartment load shouldn't really change.
Click to expand...
800 amps may not be enough to add car chargers to every unit in OP's case. This is a significant enough change to fit in with what I said earlier of changing something in each unit from gas to electric.
 
Tesla's charger- or some of them- can be linked together, up to 4 units, with one 60 amp circuit. You feed into a monitoring device then out to each charger. Apparently, it will monitor how much each charger gets but will not let it go over the 60 amp limit...
 
Dennis Alwon said:
Tesla's charger- or some of them- can be linked together, up to 4 units, with one 60 amp circuit. You feed into a monitoring device then out to each charger. Apparently, it will monitor how much each charger gets but will not let it go over the 60 amp limit...
Click to expand...
Can that work when each charger is on separate tenant metering? If all the chargers are later installed on a "house panel" then it would just be simpler to run a separate "house service" later on if more service capacity is needed.
 
kwired said:
310.15.(B)(7) Only applies to the supply conductors (feeder or service) to an individual dwelling unit.
Click to expand...

Getting a visual on this now. Thank You.

Please disregard applying 310.15(B)(7) beyond individual-unit feeds, much less where multi-unit demand factors are used.

curt swartz said:
And in this case it can't be used for the individual dwellings since the supply voltage is 208/120. :)
Click to expand...

While 2017 NEC may include 208Y/120v feeds, I now see the 83% can only apply to an individual-unit feed.
 
Status
Not open for further replies.
Top