AWQ12
Member
- Location
- Columbia sc
Are battery back up required for exit lights if data center is on A side and B side generators feeding building??
As a side note, I have worked in a jurisdiction that required 702 generators to also power exit lighting in addition to the unit batteries.
Did they have an amendment or was it just 'this is how we do it here'?
For those interested in this condition
http://www.nyc.gov/html/dob/apps/pd...apter_27_Electrical.pdf§ion=conscode_2014
2702.4 Required loads for optional standby power systems.
In addition to any other loads, optional standby power systems shall be capable of providing power to the following systems upon failure of the normal power supply or the emergency or standby power system:
1.Emergency lighting;
2.Fire alarm systems; and
3.Elevators as follows:
Wow.
They really do not seem to understand what the word optional means.
It was a killer recently because the client only had a small amount of optional loads, but it was in a highrise, and the elevator was more than twice the load of the actually requested optional load.
When we get hit by a big hurricane in FL the grid can go down for weeks (or longer). We have similar requirements but not via NEC amendments; by separate statute.
highrise elevators,
fuel dispensers on evacuation routes,
etc.