Hello,
Code question! Is a current transformer (CT) allowed inside a fused disconnect/fused safety switch? Seems like the NEC doesn't say... I've looked in article 312 and article 404.
Also, if the CT is allowed inside the FSS, would a tap for the voltage (for a power meter) also be allowed...
Sorry Oz, I didn't mean any offense about the comment I made about the manufacturer specs. Maybe you work for an equipment manufacturer... Um, I know that's just standard business practice, and I guess I was being harsh. But I really do appreciate the advice from everyone.
Brian Meagher, EIT
Well, Scotty, the VFD is not a packaged unit with the pump. They are separate vendors. BTW, I was misled by some ambiguous labeling in the submittal; it turns out they were providing VFDs for both the HW and CW pumps. Also, Oz, it is our project (US gov't) spec we're using, not one of those...
Well, it is a centrifugal pump.
Specs: "Description: Factory-assembled and -tested, centrifugal, overhung-impeller, close-coupled, end-suction pump as defined in HI 1.1-1.2 and HI 1.3; designed for installation with pump and motor shafts mounted horizontally. Rate pump for 125-psig minimum...
Hello,
I am an engineer w/mechanical & electrical background, reviewing a VFD submittal for some pumps. The VFD the contractor is proposing doesn't meet the specs, and I was wondering if anyone could tell me how important it is to have the ability to produce a lot of torque in order to get the...
United Facilities Criteria UFC 3-530-01 has military lighting design level requirements for lots of different spaces, including warehouses & offices. It's free, too.
http://www.wbdg.org/ccb/browse_doc.php?d=2944
thread659-77494
To calculate the Effective Projected Area (EPA) for situations like outdoor lighting (involving fixtures and poles) it's a function of both the projected area AND the drag coefficient. Check out this literature from GE...
