NEC 2020 - 220.14(J)

[anbm]

220.14(J) Dwelling Units
Motors rated less than 1/8 HP and connected to a lighting circuit shall be considered part of the minimum lighting load.

220.84(C)(4) - Multifamily Dwelling Calculated Loads
The nameplate ampere or kVA rating of all permanently connected motors not included in items (3)

Regarding above new rule 210.14(J) in NEC 2020, does this mean if we apply this rule, only motors equal or greater than 1/8HP have to comply with 220.84(C)(4)?

 

[anbm]

To be clear, if we go with 220.14(J) Dwelling Units rule in NEC 2020 above, 1/8HP or less motor can be part of
220.84(C)(1) in lieu of 220.84(C)(4) for load calculation below, correct?

220.84 (C) Calculated Loads. The calculated load to which the demand factors of Table 220.84 apply shall include the following:

(1) 33 volt-amperes/m2 or 3 volt-amperes/ft2 for general lighting and general-use receptacles.

(2) 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).

(3) The nameplate rating of the following:
a. All appliances that are fastened in place, permanently
connected, or located to be on a specific circuit
b. Ranges, wall-mounted ovens, counter-mounted cooking units
c. Clothes dryers that are not connected to the laundry
branch circuit specified in item (2)
d. Water heaters

(4) The nameplate ampere or kVA rating of all permanently
connected motors not included in item (3).

(5) The larger of the air-conditioning load or the fixed electric space-heating.

 

[anbm]

Will someone give any thoughts on this?

 

[Fred B]

It appears that 220.14(J) is simply giving an exemption of sorts for ceiling fans if below a certain hp rating and allows that to be part of total lighting load for calculation purposes, this avoiding the more complicated calculation of 220.84. Dont have 2020 code so not sure of other criteria associated with the section. But, in the 2017 220.14 is related to residential 1 and 2 family, 220.84 is related to multi family 3 or more.

 

[Dennis Alwon]

Correct motor less than 1/8 hp are included in the 3 watts per sq. ft if they are connected to a lighting circuit. For instance, a bath fan is already in the calculation. The bold part is new to the 2020 Nec

220.14(J) Dwelling Units. In one-family, two-family, and multifamily dwellings, the minimum unit load shall be not less than 33 volt-amperes/m2 (3 volt-amperes/ft2). The lighting and receptacle outlets specified in 220.14(J)(1), (J)(2), and (J)(3) are included in the minimum unit load. No additional load calculations shall be required for such outlets. The minimum lighting load shall be determined using the minimum unit load and the floor area as determined in 220.11 for dwelling occupancies. Motors rated less than 1∕ 8 hp and connected to a lighting circuit shall be considered part of the minimum lighting load. (1) All general-use receptacle outlets of 20-ampere rating or less, including receptacles connected to the circuits in 210.11(C)(3) and 210.11(C)(4) (2) The receptacle outlets specified in 210.52(E) and (G) (3) The lighting outlets specified in 210.70

 

[anbm]

Correct motor less than 1/8 hp are included in the 3 watts per sq. ft if they are connected to a lighting circuit. For instance, a bath fan is already in the calculation. The bold part is new to the 2020 Nec

I had same thought, thank you... it appears to me the code writer needs to clarify this further in 220.84 (C)(4)...