electricguy61
Senior Member
When you're doing loads calculations for EV charging stations, do you include the charger in the general load (that would be at 40% after the 1st 8kw), or after the general load? 2500 sq ft home w/ 100amp service, underground service so not readily upgraded. Note the load calcs:
Lighting Load: 2500 sq st x 3 watts = 7500 watts
(2)small appliance circuits @ 1500 watts = 3000
(1) laundry circuit @ 1500 watts = 1500
(1) dishwasher @ 1188 watts = 1188
(1) garbage disposal @ 1140 watts = 1140
(1) clothes dryer @ 6000 watts = 6000
(1) AC condenser load = 5842
(1) blower fan load = 1127
Charger load (TESLA) (40a x 230v) = 9200
Total calculated load w/o load factoring = 36497 watts
First 8kVA @ 100%(NEC 220.83) = 8000
Remainder of load (28497) @ 40% = 11399
Total load for service calculations = 19399 watts / 230v = 84.3 amps
But.......... if they run the AC, including blower motor (6969w), clothes washer (1500w), dryer (6000w) and the charger (9200w) at the same time: 23,669 watts /230v= 103 amps. And that doesn't include any general lighting load.
What do you think? Is it safe? Does it meet code to install the charger?
Lighting Load: 2500 sq st x 3 watts = 7500 watts
(2)small appliance circuits @ 1500 watts = 3000
(1) laundry circuit @ 1500 watts = 1500
(1) dishwasher @ 1188 watts = 1188
(1) garbage disposal @ 1140 watts = 1140
(1) clothes dryer @ 6000 watts = 6000
(1) AC condenser load = 5842
(1) blower fan load = 1127
Charger load (TESLA) (40a x 230v) = 9200
Total calculated load w/o load factoring = 36497 watts
First 8kVA @ 100%(NEC 220.83) = 8000
Remainder of load (28497) @ 40% = 11399
Total load for service calculations = 19399 watts / 230v = 84.3 amps
But.......... if they run the AC, including blower motor (6969w), clothes washer (1500w), dryer (6000w) and the charger (9200w) at the same time: 23,669 watts /230v= 103 amps. And that doesn't include any general lighting load.
What do you think? Is it safe? Does it meet code to install the charger?