My question deals with 700.5(B). What I have is a CBRF (Community Based Retirement Facility), a State of Wisconsin creation.
Essentially it is a 30,000 Sq. Ft. building with individual rooms w/bed & bath for residents. Common living and eating areas. Commercial Kitchen, therapy and employee locker rooms.
Originally they wanted a backup generator for the whole facilty (200KW). Then this budget thing came up. Now they want a generator to operate emergency lighting, fire system & nurse call system. Also they want furnaces, refrigeration, phone system & site lighting on the same generator.
Of course the EM lighting, fire & nurse systems are emergency circuits and would come under the scope of Article 700. The optional loads on the same generator would come under 700.5(B) Selective Load Pickup and Load shedding.
My question is, would one transfer switch with two panelboards, one for EM loads and the other for optional loads comply with the intent of 700.5(B)? The optional load panel would have a main breaker to limit the load if something should go wrong or if additional circuits are added to it in the future that would overload the generator.
. . . Or are we talking two transfer switches with a current sensing switch capable of switching the transfer switch that supplies the optional load panel on and off as needed to shed load?
Essentially it is a 30,000 Sq. Ft. building with individual rooms w/bed & bath for residents. Common living and eating areas. Commercial Kitchen, therapy and employee locker rooms.
Originally they wanted a backup generator for the whole facilty (200KW). Then this budget thing came up. Now they want a generator to operate emergency lighting, fire system & nurse call system. Also they want furnaces, refrigeration, phone system & site lighting on the same generator.
Of course the EM lighting, fire & nurse systems are emergency circuits and would come under the scope of Article 700. The optional loads on the same generator would come under 700.5(B) Selective Load Pickup and Load shedding.
My question is, would one transfer switch with two panelboards, one for EM loads and the other for optional loads comply with the intent of 700.5(B)? The optional load panel would have a main breaker to limit the load if something should go wrong or if additional circuits are added to it in the future that would overload the generator.
. . . Or are we talking two transfer switches with a current sensing switch capable of switching the transfer switch that supplies the optional load panel on and off as needed to shed load?
