home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Business Heaven
/
Business Heaven.iso
/
engineer
/
demand20
/
demand.hlp
< prev
next >
Wrap
Text File
|
1993-09-05
|
15KB
|
480 lines
.TOPIC:
Contents
Square Feet Cooking Electric Heat
Small Appliance Heating Continuous
Laundry Cooling Four or More
Fixed Appliance Motor Loads Service Info
Customer Info Note Service REQ#
Reports Data Base Help on Help
Command Buttons Service Schedule Formulas
Demand Calculation Special Keys Maximum Field Length
Database Repair Utility Database Packing Utility
.TOPIC:
Special Keys
* F1 Help - Displays a help message about the
task you are performing.
* ENTER or TAB - Signal the computer to accept an entry
that you have made, and move the cursor
to the next field.
* SHIFT + TAB - Accept this entry and move the cursor
back to the previous field.
* ALT + HOT KEY - Used to select a menu item or command
button function.
* ESC - Cancel the task you are performing and
exits the program.
* Up Arrow - Accept this entry and move the cursor
to the previous field.
* Down Arrow - Accept this entry and move the cursor
to the next field.
* Page Up - When at the customer name, page up will
move to the next data base record.
* Page Down - When at the customer name, page down will
move to the previous data base record.
* Home - Move the cursor to the beginning of the
current field.
* End - Move the cursor to the end of the
current field.
.TOPIC:
Demand Calculation
The Single Dwelling Demand Calculation evaluates the
loads of a proposed or existing single dwelling. Calculate
the required service size in accordance with ARTICLE 220 -
BRANCH-CIRCUIT AND FEEDER CALCULATIONS. Produce Reports
for the general and optional methods. Complies with NFPA 70
National Electrical Code 1993 edition.
PRINT SINGLE DWELLING FORM:
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Print a form that can be used IN THE FIELD to collect
information for the demand calculation.
.TOPIC:
Square feet
Enter the square feet of floor area from the outside
dimensions of the building. The computed floor area
shall not include open porches, garages, or unused
or unfinished spaces not adaptable for future use.
Enter the living space.
REF: 220-3(b), 220-11, tables 220-3(b), 220-11
.TOPIC:
Small appliance
Enter the quantity of 20 ampere, two wire,
small appliance branch circuits.
REF: 220-4(b), 220-16(a), 220-11, table 220-11
.TOPIC:
Laundry
Enter the quantity of 20 ampere, two wire,
laundry branch circuits.
REF: 220-4(c), 220-16(b), 220-11, table 220-11
.TOPIC:
Heating
Enter the total wattage of the heating system.
In the case of a heat pump, if supplementary heat is not on
at the same time as the heat pump the smaller load need not
be added to the total.
Electric Heat Continuous Four or More
.TOPIC:
Electric Heat
Put an X in the box if the heat is electric.
Do not put an X in the box if the heat is not electric.
This is used for the Optional Calculation Method to
determine if the heating load can be calculated at 65
percent of the nameplate rating(s) of electric space heating,
if less then four separately controlled units.
Continuous Four or More
.TOPIC:
Continuous
Put an X in the box if:
1. The heat is electric and the usual load is expected
to be continuous at the full nameplate value.
2. The heating is not continuous, however, it is a heat
pump with the compressor load larger than the
Supplemental load. REF: Table 220-30(1)
Electric Heat Four or More
CONTINUOUS = A load where the maximum current is expected
to continue for three hours or more.
REF: Article 100
NOTE: Table 220-30 States 100% of the nameplate ratings of
electric thermal storage and other Heating systems where the
usual load is expected to be continuous at the full nameplate
value.
REF: 220-30.
.TOPIC:
Four or More
Put an X in the box if: The heat is electric and is four or
more separately controlled units. This is used for the
Optional Calculation Method to determine if the Heating
load can be calculated at 40 percent of the nameplate
rating(s) of electric space heating for four or more
separately controlled units.
REF: 220-30.
Electric Heat Continuous
.TOPIC:
Cooling
Enter the total wattage of the cooling system. This value
will also be compared against the Motor loads of the fixed
appliance schedule to determine 25% of the largest motor.
REF: 220-21
.TOPIC:
Dryer
Enter the wattage of the electric dryer. For the general
method if an electric dryer is present the minimum demand
load is 5000 watts. for the optional method the dryer is
calculated at nameplate.
REF: 220-18
.TOPIC:
Cooking
Enter up to three electric ranges or cooking appliances. The
minimum wattage is 1751 to a maximum of 12,000. The program
will automatically classify each category according to column
A,B or C and apply the demand factors accordingly.
REF: 220-19
.TOPIC:
Motor Loads
Enter the name, volts and amps for the Fixed appliance that
are motor loads, such as well pump, compactor, vent fan,
disposal, pool motor, etc. This group will be compared with
each other as well as the Cooling load to determine 25% of
the largest motor.
REF: 220-17, 430-24, 430-25, 430-26
Table 430-148 Full-Load Currents in Amperes
Single-Phase Alternating-Current Motors
════════════════════════════════════════════════════════
HP 115v 200v 208v 230v
────────────────────────────────────────────────────────
1/6 4.4 2.5 2.4 2.2
1/4 5.8 3.3 3.2 2.9
1/3 7.2 4.1 4.0 3.6
1/2 9.8 5.6 5.4 4.9
3/4 13.8 7.9 7.6 6.9
────────────────────────────────────────────────────────
1 16 9.2 8.8 8
1½ 20 11.5 11 10
2 24 13.8 13.2 12
3 34 19.6 18.7 17
────────────────────────────────────────────────────────
5 56 32.2 30.8 28
7½ 80 46 44 40
10 100 57.5 55 50
════════════════════════════════════════════════════════
.TOPIC:
Fixed appliance
Enter the fastened in place fixed appliances that are
wattage loads, such as water heater, dishwasher, etc.
REF: 220-17, 430-24, 430-25, 430-26
.TOPIC:
Customer Info
Enter information about the customer.
The Name, City, State & Zip fields can be indexed. The
records will be displayed in alphabetical order based
on the indexed field. The name field is the default
index field.
When at the customer name, page up will move to the
next data base record. Page Down will move to the
previous data base record.
Special Keys Help on Help Data Base
.TOPIC:
Note
This field will hold information up to 72 characters.
When printing Reports this field will print directly below
the customer block.
Example:
After installing the service a report could be produced
with a heading like:
Frank & Mary Connoly
33 Peace Road
Hudson, NH 12345
Courtesy of ABC Electrical contractor 1-234-567-8901
.TOPIC:
Service REQ#
This is the number that is issued from the local utility
company to reference a specific service or project.
.TOPIC:
Service Info
Examples of use:
Panel...... Square D 200 amp 40 circuit surface main breaker
Conductors. 4/0 AL conductor type XHHW in 2" PVC
Grounding.. One 5/8" X 8' rod in cellar under panel #4 cu
Report 1... 155' run from pole 24-17 along driveway
Report 2... Granite State Electric Utility Co. 603-898-9798
Report 3... 15 spare circuits as of 3/12/93
Report 4... Lot #14
Report 5...
Report 6... Ran spare 2" PVC in trench for future fiber
Report 7... Optics cable as per owners request
This will print on the reports when the long report
is selected.
.TOPIC:
Reports
Produce reports for:
1. The general or optional method for a new service
2. The optional method for an existing service
3. Long reports have the service information attached
4. Short reports have the calculation only
Reports can go to:
1. Disk via an ASCII file that you can edit
2. Go to printer port LPT1 thru LPT3
Report notes:
1. When sending a report to a file you may replace an existing
file or append to an existing file.
2. When sending a report to the printer 1 to 10 copies can
be printed.
.TOPIC:
Data base
All records can be saved to disk in a data base file named
DEMAND.MDB. The data base will first show records on an
ascending order based on the name field first.
Name = Name -> city -> state
City = City -> name -> state
State = State -> name -> city
Zip = Zip -> name -> city
Example: The name index will sort based on the name field
first, then as sub-index it will sort on city and
lastly on state.
.TOPIC:
Help on help
Selecting a Help link:
----------------------
With a mouse - click on phrases outlined by two triangles.
With the keyboard - Press TAB or Shift-TAB to select a link.
Press ENTER to jump to that topic.
Scrolling the Help window:
--------------------------
With a mouse - click on the horizontal or vertical
scroll bars.
With the keyboard - press the cursor navigation keys.
Closing the Help window:
------------------------
With a mouse - double click on the window's control box icon.
top left.
With the keyboard - press Esc or Ctrl-F4.
Contents - displays a table of contents for the application's
Help. Press C to select Contents.
Search - opens a dialogue box that lists all available Help
topics. Select a topic from the list box and press
ENTER. Press S to select Search.
Back - jumps to the last Help topic viewed. Press B to
select Back.
History - lists the last 20 Help topics viewed. Jump to a
topic by selecting from the list box and pressing
ENTER. Press T to select History.
Copy - Copies the contents of the current Help topic into
an edit area. Select the text you want copied to
the Clipboard and choose Copy. Choosing Copy
without selecting any text in the edit area copies
the entire Help topic to the Clipboard. Press P to
select Copy.
.TOPIC:
Command buttons
New rec....... Create a new record.
Update........ Update the current record. When a record
is changed in any way, a prompt to update
will be requested.
Delete........ Delete the current record.
Prev.......... Move to the previous record in the indexing
sequence.
Next.......... Move to the next record in the indexing
sequence.
Find.......... Find a specific record. The search will take
place on the field that is the current index.
Calc.......... Bring up a pop up calculator.
Info.......... Toggle the service information screen.
Exit.......... Exit the program.
Esc........... The Esc button will move out of the program.
.TOPIC:
Database Packing utility
ISAMPACK purges records marked for deletion and recovers disk
space formerly used by deleted records in 32K blocks.
Syntax ISAMPACK DEMAND.MDB
Database Repair Utility
.TOPIC:
Database Repair Utility
ISAMREPR recovers databases that become corrupted; it
recreates them by systematically evaluating every table
and index and using every piece of internally consistent
information in the file.
Syntax ISAMREPR DEMAND.MDB
Database Packing Utility
.TOPIC:
Service schedule
Conductor Types and Sizes
RH-RHH-RHW-THHW-THW-THWN-THHN-XHHW-USE
─────────────────────────────────────────────────────────
Aluminum or
Copper Copper-Clad AL Rating in Amps
─────────────────────────────────────────────────────────
AWG AWG
4 2 100
3 1 110
2 1/0 125
1 2/0 150
1/0 3/0 175
2/0 4/0 200
3/0 250 kcmil 225
4/0 300 kcmil 250
250 kcmil 350 kcmil 300
350 kcmil 500 kcmil 350
400 kcmil 600 kcmil 400
─────────────────────────────────────────────────────────
.TOPIC:
Formulas
OHM'S LAW
~~~~~~~~~
Watts = E x I = Volts X Amps
Watts = E² ÷ R = (Volts squared) ÷ Ohm's
Watts = I² x R = (Amps squared) X Ohm's
───────────────────────────────────────────────────
Volts = I X R = Amps X Ohm's
Volts = P ÷ I = Watts ÷ Amps
Volts = √(PxR) = Square of (Watts X Ohm's)
───────────────────────────────────────────────────
Amps = P ÷ E = Watts ÷ Volts
Amps = E ÷ R = Volts ÷ Ohm's
Amps = √(P ÷ R) = Square of (Watts ÷ Ohm's)
───────────────────────────────────────────────────
Ohm's = E ÷ I = Volts ÷ Amps
Ohm's = E² ÷ P = (Volts squared) ÷ Watts
Ohm's = P ÷ I² = Watts ÷ (Amps squared)
───────────────────────────────────────────────────
.TOPIC:
Maximum field length
The Maximum Field Lengths for the various fields is the data
that will be saved in the data base record. If you type in a
longer field it will print on the report, however it will
not be saved in the data base file DEMAND.MDB
Customer Name ... 24
Customer Address. 24
Customer City ... 24
Customer State .. 24
Customer Zip .... 24
Customer Note1 .. 70
Customer Note2 .. 70
Service Request . 16
Fixed Name ...... 24
Motor Name ...... 24
Service Info .... 40