wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
Looks like the language in 220.82(B) could use some cleaning up.
Cheers, Wayne
(B) General Loads.
The general calculated load shall be not less than 100 percent of the first 10 kVA plus 40 percent of the remainder of the following loads:
This proposal addresses some imprecision in the language in 220.82(B)(3).
First, moving the clause about "not connected to . . . branch circuit(s) specified in 220.82(B)(2)" from 220.82(B)(3)(3) to the opening of 220.82(B)(3) indicates that the exclusion should apply to any of the loads listed in 220.82(B)(3) to avoid double counting. For example, as the language currently stands, a refrigerator connected to a small appliance branch circuit in a kitchen should be counted twice: once as part of the 1500 VA specified in 220.82(B)(2), and one as an appliance "located to be on a specific circuit," under 220.82(B)(3)(1).
Second, it may be possible in a dwelling unit to have utilization equipment that is not a motor, not an appliance, and not any of the specific types of utilization equipment enumerated in 220.82(B)(3). Thus under the current language, the load for such utilization equipment is omitted completely from the calculation. Adding "or other utilization equipment" to the final clause of 220.82(B) provides a catchall to be sure that such utilization equipment is included in the load calculation. And moving that last clause from 220.82(B)(4) to 220.82(B)(3)(5) eliminates the need to repeat the language about "not connected to branch circuits specified in 220.82(B)(2)."
Cheers, Wayne
(B) General Loads.
The general calculated load shall be not less than 100 percent of the first 10 kVA plus 40 percent of the remainder of the following loads:
- 33 volt-amperes/m2 or 3 volt-amperes/ft2 for general lighting and general-use receptacles. The floor area for each floor shall be calculated from the outside dimensions of the dwelling unit. The calculated floor area shall not include open porches, garages, or unused or unfinished spaces not adaptable for future use.
- 1500 volt-amperes for each 2-wire, 20-ampere small-appliance branch circuit and each laundry branch circuit covered in 210.11(C)(1) and (C)(2).
- The nameplate rating of the following, except where connected to one of the branch circuits specified in 220.82(B)(2):
- All appliances that are fastened in place, permanently connected, or located to be on a specific circuit
- Ranges, wall-mounted ovens, counter-mounted cooking units
- Clothes dryers
that are not connected to the laundry branch circuit specified in 220.82(B)(2) - Water heaters
- The nameplate ampere or kVA rating of all permanently connected motors or other utilization equipment not included in 220.82(B)(3)(1)-(4).
This proposal addresses some imprecision in the language in 220.82(B)(3).
First, moving the clause about "not connected to . . . branch circuit(s) specified in 220.82(B)(2)" from 220.82(B)(3)(3) to the opening of 220.82(B)(3) indicates that the exclusion should apply to any of the loads listed in 220.82(B)(3) to avoid double counting. For example, as the language currently stands, a refrigerator connected to a small appliance branch circuit in a kitchen should be counted twice: once as part of the 1500 VA specified in 220.82(B)(2), and one as an appliance "located to be on a specific circuit," under 220.82(B)(3)(1).
Second, it may be possible in a dwelling unit to have utilization equipment that is not a motor, not an appliance, and not any of the specific types of utilization equipment enumerated in 220.82(B)(3). Thus under the current language, the load for such utilization equipment is omitted completely from the calculation. Adding "or other utilization equipment" to the final clause of 220.82(B) provides a catchall to be sure that such utilization equipment is included in the load calculation. And moving that last clause from 220.82(B)(4) to 220.82(B)(3)(5) eliminates the need to repeat the language about "not connected to branch circuits specified in 220.82(B)(2)."
