The increased output can be attributed to the following:
-The T12 ballasts are overdriving the T8 lamps.
-T8 lamps, by design, possess a higher lumen output than their T12 counterparts of similar length.
-The T8 lamps are new and have not suffered from lumen depreciation.
Anyways, I hate to...
This may not be of too much help to you, but the Illumination Engineering Society of North America recommends an average illuminance of 30 footcandles (roughly 323 lux) for a space involving "motor and equipment observation."
For buildings classified as high-rises, we are always required to provide standby power for at least one elevator.
For a low-rise building such as the one you describe, the only loads that have ever been required to be served by the generator are: emergency egress lighting (If not using...
I am involved in a project with a fire alarm system configured in a campus-style arrangement amongst several buildings. One fire alarm control panel is installed at each building, and all are networked in what I am assuming is an NFPA Class B (non-redundant) configuration. Two of the fire alarm...
Agreed with all the other posters.
The LEED AP exam, at its core, is simply a test of rote memorization skills. The questions are non-technical, but vague and phrased in such a way that they are sometimes difficult to answer.
Our company's marketing person, with absolutely no engineering or...
In light of the housing market and the overall condition of the economy, I'm actually surprised to hear other local professionals tell me that their workloads really haven't skipped a beat.
At my firm, however, we've noticed a quick decline in the number of billable projects. Almost zero...
ASME A17.1 (Safety Code for Elevators and Escalators) requires their use for the shutdown of the elevator motor(s) in elevator machine rooms protected by an automatic fire sprinkler system. These spaces are normally protected by a heat detector, and the idea is that the heat detector will cause...
I work at an MEP engineering firm that reimburses its employees upon taking ICC certification exams. While our company doesn't really perform any inspection services, our boss still encourages us to take them. I sometimes come across job postings that list ICC certification as a prerequisite...
I have a client with some very unusual design requirements.
We're going to have a 1200A service entrance panel, which we'll call panel "A." Panel A supplies a 1200A automatic transfer switch. Panel "B" is a 1200A main distribution panel supplying all the buildings at the site.
The client wants...
Ashereng,
Exactly. A significant percentage of my coworkers are unhappy with their wages at the present time. The work environment is more laid back and relaxed than any other I have been in (Which is great - don't get me wrong), but it appears that some employees would be more than willing to...
I've been working at the same MEP engineering firm for the past three years and am just completely floored at all the great talent we've lost to competing engineering firms (The exception being a non-degreed HVAC designer that completely switched careers). They all leave for the same reason: an...
I'm not an electrical engineer, but more of a junior electrical designer without an engineering degree. Anyways...
If all you're doing is designing electrical contract documents for schools and offices, you may want to look into possible employment at another MEP firm. There are several in my...
SpecialSystems,
I probably should have worded my original post much differently. We're not truly "designing" security and telephone systems, we merely make provisions for them. The most we do is provide conduits and enclosures for the security and telephone contractors to do whatever it is they...
Electrical designers and engineers at the MEP firm I work at are required to design fire alarm systems, telephone, and on occasion, security systems.
I use the term "design" very loosely, however. For telephone systems, we provide locations for telephone and data outlets, telephone...
To reiterate and add to what was already said...most modern appliances that I've encountered (Water heaters, electric cooktops/ranges, dryers, etc.) are dual-rated for both 208V and 240V. Heating elements are simply de-rated when operating at a lower voltage. For example, an electric dryer rated...
waross,
I was just talking to some people at my office today about the Dela High-Leg configuration, and there are a few things I don't understand.
-If 240V is obtained between the high leg and another phase, then why would it not be used? I was originally under the impression that the high leg...
I agree with mpparent. It's best to design the electrical plans before sizing the service.
The only time we use square footage calculations is when we're dealing with a "shell" building in which exterior walls are put up during the first phase of construction and tenant spaces are completed in...
The engineering firm I work at is the exact same way. The form is generic and looks as if it could be purchased from an office supply store. If I recall correctly, rankings are from "Unsatisfactory" to "Satisfactory" to "Above Satisfactory" to "Excellent." Nobody ever appears to receive a raitng...
If anyone is still interested, I just attended a lighting control seminar yesterday that addressed the original problem. Great timing, huh? One of the local lighting sales reps delivered a presentation alongside with Leviton, and from my understanding, all of the above issues are as good as...
jraef,
The decision to go against using solely occupancy sensors in certain buildings has been made by my boss, the lead electrical engineer and the owner of the company. He has the final word in these matters, although he is always open to better ideas.
I only get to hear bits and pieces of...
