home *** CD-ROM | disk | FTP | other *** search
- .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
-