JustWork
Member
- Location
- New Jersey
Hello all I am in need of some assistance. We just took over in the middle of an existing project which is an existing two story residential duplex the size of the building is 25' x 30' = 750 sq ft per floor. This dwelling currently has a 200A OH service (seu) to a wp wireway from there it is split to two 100A Pans then to the main panels one in lower apartment (no renovations and all gas appliances) and the other to upper apartment (renovations in progress all electric appliances). The upper dwelling has been wired by another contractor with the exception of heat pump, electric dryer, and water heater. According to the permit information which was originally submitted by others which I didn't pick up on :slaphead: they had put down retaining existing 100A panel in lower apartment and installing new 200A panel in upper apartment. My issue is that I retained both existing 100A panels in the upper and lower apartments and was told I have to upgrade the upper apartment to a 150 or 200A because the 100A is undersized. I figured it as follows 750sq ft @ 3va =2250 two appliance @ 3000 laundry @ 1500 range @ 12K Water heater @ 4500 Dryer @ 5000 Dish washer @ 1200 Heat pump @ 6000 Airconditioning @ 5000 for a total of 40,450 the first 10k @100% = remainder of 30,450 @ 40% = 12,180 divided that by 240= 50.75A did I not figure this out properly?:ashamed1: We are maxed out in breaker space requirements within the panel.