There is a single family home(A) with an apartment(B). The boiler is located in (A) but supplies water to (B). It is fed from a panel in (A) the ’Load’ is in (A) but the ‘or loads associated only with that unit, is problematic. No common areas, single meter. Does hot water running through (B) make it a load associated with both units? Seems unreasonable to bring the breaker outside to the meter to comply with NEC. What might the purpose be that someone in B needs to turn off the boiler but not have access to it? thoughts?
210.25 (A) branch circuits , more than one occupancy. ‘Loads associated with’
- Thread starter Snowbound
- Start date
hbiss
EC, New York NEC: 2017
- Location
- Little Falls, New York NEC: 2017
- Occupation
- EC
My head hurts. This is an accessory apartment much like millions of others. Power, heat and water is supplied by the home it is part of. If there are any problems the renter has to get in touch with the owner. Unless there are local ordinances, I don't see what the problem is.
-Hal
-Hal
letgomywago
Senior Member
- Location
- Washington state and Oregon coast
- Occupation
- residential electrician
ADU or apartment?
So long as the apartment lease says water is included and hot water is included the no issue.
Boilers usually only need disconnecting means by entrance to the equipment.
So long as the apartment lease says water is included and hot water is included the no issue.
Boilers usually only need disconnecting means by entrance to the equipment.
I am trying to reason it out with him. The best I can think of is if there were two meters and I did a load calculation to size the breakers obviously the boilers “load” would go to the unit with the boiler, not some percentage to the adjacent apartment. I think it’s a vocabulary thing, would be nice to find something example somewhere, a picture….i know it’s wrong.
hbiss
EC, New York NEC: 2017
- Location
- Little Falls, New York NEC: 2017
- Occupation
- EC
I don't understand. What difference does it make? Is he talking about the electrical load of the boiler and how it should be apportioned to each unit?
-Hal
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
As long as the "management" is available, it should be okay.
i don’t understand the motivation of the inspector. he Is taking the words “loads associated with” and applying them to the boiler in that it heats both units , a shared utility, so it is associated with both units thus breaker needs to be assessable by both units. Obviously not right. To argue this nonsense all I can think of is the (Load) is not associated with both units because if I were to calculate the loads of each unit to minimize their respective feeders I would not take some percentage of the boilers load in A and apply it to the service calculation of B, thus this load is (Not) associated with B. That it is sending hot water ,a shared utility, is inconsequential.
is this a valid argument?
is this a valid argument?
wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
210.25(A) says: "(A) Dwelling Unit Branch Circuits. Branch circuits in each dwelling unit shall supply only loads within that dwelling unit or loads associated only with that dwelling unit."
So for a branch circuit in dwelling unit A to supply a load, at least one of two things must be true: (1) the load is is within dwelling unit A, or (2) the load is associated only with dwelling unit A, meaning it is not associated with any other dwelling unit.
If (1) is true, then (2) does not need to be true. So if the load is the boiler (it is), and the boiler is within dwelling unit A, it doesn't matter if the boiler is associated with more than one dwelling unit (which it arguably is). (1) is satisfied, and that is enough to satisfy 210.25(A).
Cheers, Wayne
So for a branch circuit in dwelling unit A to supply a load, at least one of two things must be true: (1) the load is is within dwelling unit A, or (2) the load is associated only with dwelling unit A, meaning it is not associated with any other dwelling unit.
If (1) is true, then (2) does not need to be true. So if the load is the boiler (it is), and the boiler is within dwelling unit A, it doesn't matter if the boiler is associated with more than one dwelling unit (which it arguably is). (1) is satisfied, and that is enough to satisfy 210.25(A).
Cheers, Wayne