An existing finished basement is remodeled into a new apartment. A new subpanel is installed to serve this new dwelling. The heat and A/C is supplied by the existing dwelling and will not be included in the feeder calculation. What size feeder and OCPD should be installed at this new panel? Use the following loads to calculate the feeder and subpanel OCPD. The subpanel voltage is 120/240V 1-phase, 3-wire. Floor area - 900 square-feet; 2 small appliance circuits and 1 laundry circuit; Water heater (240 V) - 3,500 W; Electric range - 6,000 W; Electric clothes dryer - 4,500 W; Sump pump #1 (120 V) - 1,176 VA (largest motor); Sump pump #2 (120V) - 864 VA; Garbage disposer (120 V) - 920 VA; Supplemental electric in-wall heat for bedroom - 3,000 W

• A. 6 AWG60 A OCPD
• B. 4 AWG100 A OCPD
• C. 3 AWG100 OCPD
• D. 3 AWG110 A OCPD

Answer: (B)