Fluorescent Mini Inch Light Fixture Dimensions
Calculating Instantaneous Demand from your Electric Meter
Maximum capacity of pipe in cubic feet of gas* per hour or kBTU's
Sizing Gas Systems
Length of piping in feet |
|
* Low Pressure (8 oz.) Natural Gas where 1 cubic foot = 1000 BTU's
Cooktops are typically 40,000 BTU's - Gas Insert Fireplaces are typically 30,000-40,000 BTU's - Gas Outdoor Grill typically 40,000 BTU's- Hot Water Tanks typically 40,000 BTU's
Golden
Sections have interesting mathematical properties. Since a/b=(a+b)/a,
it follows that aa-ab-bb=0. If this quadratic equation is solved for a in
terms of b, the solution is a+b(1 plus or minus the square root of 5) /2,
which is approximately equal to 1.618. Using approximate numerical
values, 1/phi = 0.618, phi = 1.618 and phi squared= 2.618. The golden
ratio arises in Fibonacci
Sequences and in the construction of some regular polygons, it is also
useful in numerical analysis.
Close enough for rock and roll ! This was considered the perfect proportion with many architectural antiquities based on this mathematical model. Many naturally occuring proportions also. I designed and built a coffee table based on this formula where four elements of proportions were derived from this formula. It came out very nice.
This is an example of a Fibonacci Sequence developed from the Golden section equation above
Fluorescent Mini Inch Light Fixture Dimensions
Length:
+======+ 12.25"
+==========+ 21.25"
+============+ 24.5"
+================+ 33.5"
+=====================+ 42.5"
Alkco , American Fluorescent , Evergreen, Lithonia
Identifying Lines:
If you need to identify which pair is which in your multi-line home and if you can rig up a phone, or own a test set like the blue one pictured here, you can dial into a special number called an "ANAC" and it will audibly tell you the phone number of the pair you are tapped into. Have your pencil ready it comes quick and only once. Xtreeemly handy. The phone company has a bunch of diagnostic numbers like this that it uses and guards from general distribution. This is yet another reason to befriend your lineman. This number used to be posted but the phone company changed it. When I find out again I will post it. If you find out what it is send me an email.
Mike Sandman Chicago's Telecom Tool Man, Korean Butt-sets for less than $100
Telephony Info advanced and not organized real well but some info
Doing your own Telephone Wiring? Here is a basic primer on what to do.
Calculating Instantaneous Demand from your Electric Meter
The table shown is for a meter with a kh constant of 7.2
(see the illustration below to find out your kh constant value)
| Seconds to complete 1 revolution | watt hours | Kwh | Amperage | Cost per hour $@.11/Kwh |
| 60 | 432 | .43 | 3.6 | .05 |
| 55 | 471 | .47 | 3.9 | .05 |
| 50 | 518 | .52 | 4.3 | .06 |
| 45 | 576 | .58 | 4.8 | .06 |
| 40 | 648 | .65 | 5.4 | .07 |
| 35 | 741 | .74 | 6.2 | .08 |
| 30 | 864 | .86 | 7.2 | .10 |
| 25 | 1037 | 1.04 | 8.6 | .11 |
| 20 | 1296 | 1.30 | 10.8 | .14 |
| 18 | 1440 | 1.44 | 12.0 | .16 |
| 16 | 1620 | 1.62 | 13.5 | .18 |
| 14 | 1851 | 1.85 | 15.4 | .20 |
| 13 | 1994 | 1.99 | 16.6 | .22 |
| 12 | 2160 | 2.16 | 18.0 | .24 |
| 11 | 2356 | 2.36 | 19.6 | .26 |
| 10 | 2592 | 2.59 | 21.6 | .29 |
| 9 | 2880 | 2.88 | 24.0 | .32 |
| 8 | 3240 | 3.24 | 27.0 | .36 |
| 7 | 3703 | 3.7 | 30.9 | .41 |
| 6 | 4320 | 4.32 | 36 | .48 |
| 5 | 5184 | 5.18 | 43.2 | .57 |
| 4 | 6480 | 6.48 | 54.0 | .71 |
| 3 | 8640 | 8.64 | 72 | .95 |
| 2 | 12960 | 12.96 | 108.0 | 1.43 |
| In this picture the kh constant for this meter is 4.8 |
| picture exerpt from: http://eber.ed.ornl.gov/commercialproducts/basicelecmtr1.htm |
| |
| 1. Time the seconds it takes the rotating disk to make one complete revolution. | |
| 2. Take 60 (seconds) and divide it by the seconds it takes to make one revolution.This gives you the number of revolutions that occur in the space of a minute. | |
| 3. The kh constant number on the meter (see picture above) represents the number of watts consumed for every turn of the rotating disk. Multiply the result from #2 above, times the kh constant factor on the meter. This result rrepresents watts/minute. | |
| 4. Convert this to watt hours by multiplying the result times 60 (minutes). | |
| 5. divide the result from#4 above by 1000 if you want to know the kilowatt hours (Kwh). | |
| 6. Divide this result by 120 volts to get an amperage drawn value. |