jst442
Member
- Location
- Idaho/Washington
- Occupation
- Journeyman Electrician
That makes sense I really appreciate your time! Is the
Just to add a little more of an example:
For the two family optional your summing up all of the following the items (1)-(5) under 220.84(C):
- Add up the total square feet of both units and figure 3 VA per square foot.
- 1500 VA for each Kitchen Appliance and each laundry circuit If the question does not specify the number of small appliance circuits, figure two kitchen circuits for each unit. If it does not mention a laundry area there is no laundry circuit [210.52(F)].
- From both units all the nameplates of the following:
- All Appliances that are fastened in place or on a dedicated circuit etc.
- Ranges, wall-mounted ovens, counter-mounted cooking units at namplate, only if specified in the question. If namplate is not specified use 8kW as per 220.84(A) Exception.
- Electric Clothes dryer namplates only if stated in the question.
- Water heater namplate only if specified in the question.
- VA of motors, if the motor is given in only HP you need to use the table 430.248 to get the amps and 220.6 for voltage.
- Sum up the above.
- Multiply that total by 1.5 to create 3 'ghost units' of equal size.
- Apply the 45% demand factor.
Effectively steps 6 and 7 apply a 67.5% demand factor to the sum.
Wow that makes a lot of sense. I really appreciate you clarifying it! Thank you for your time I owe you big time!Just to add a little more of an example:
For the two family optional your summing up all of the following the items (1)-(5) under 220.84(C):
- Add up the total square feet of both units and figure 3 VA per square foot.
- 1500 VA for each Kitchen Appliance and each laundry circuit If the question does not specify the number of small appliance circuits, figure two kitchen circuits for each unit. If it does not mention a laundry area there is no laundry circuit [210.52(F)].
- From both units all the nameplates of the following:
- All Appliances that are fastened in place or on a dedicated circuit etc.
- Ranges, wall-mounted ovens, counter-mounted cooking units at namplate, only if specified in the question. If namplate is not specified use 8kW as per 220.84(A) Exception.
- Electric Clothes dryer namplates only if stated in the question.
- Water heater namplate only if specified in the question.
- VA of motors, if the motor is given in only HP you need to use the table 430.248 to get the amps and 220.6 for voltage.
- Sum up the above.
- Multiply that total by 1.5 to create 3 'ghost units' of equal size.
- Apply the 45% demand factor.
Effectively steps 6 and 7 apply a 67.5% demand factor to the sum.