Libris Britannia 4/science library(b).zip/science library(b)/ELECTRON/3442.ZIP/ELECTRIC.ZIP/ELECTRC5.DOC

Text File | 1988-08-25 | 15KB | 375 lines

       |-----------------------  ELECTRC5  -------------------------|
       |                     Copyright 1987,88                       |
       |                    All Rights Reserved                     |
       |------------------------------------------------------------|


SYSTEM REQUIREMENTS :
        MS/DOS OR PC/DOS Version 2 or higher
        150k of free memory
        1 disk drive


Program Description :

        ELECTRC5 is designed to perform most common electrical contracting
        calculations such as :

    Power/voltage/current/resistance of resistive loads.
    Lighting fixture calculations based on zonal cavity method.
    Calculate voltage drop for various loads, voltages and run lengths.
    Calculate required wire size based on allowable voltage drops.
    Determine the cost to operate various loads at different kwh charges.
    Determine conduit size for combination of different wire sizes & types.
    Quick calculation of Device Box fill.
    Lookup of system grounding conductors.
    Equipment grounding conductor size table.
    Underground cover table.
    KW to ampere conversion tables.

 -----------------------------------------------------------------------------


Changes from ELECTRC4 :
        1. The Zonal Cavity Method of Lighting Calculation has been revised
           to allow "what if" calculations using different fixtures without
           having to re-enter all of the room data.

        2. The Voltage Drop Calculator has been revised to accomidate
           larger current values and conductor sizes.

        3. Addition of type THHN conductors in the Wire Selector.

        3. Addition of a quick reference table of proper sizing of
           grounding electrode conductors, and also of equipment
           grounding conductors.

        4. Addition of an underground cover requirement table.

        5. Addition of Kw to Ampere conversion tables.

------------------------------------------------------------------------------


Functions in ELECTRC5 :


(A)  Dc Power/Voltage/Current/Resistance :

PURPOSE:
        Calculates values for two unknown values of power, voltage,
        current and resistance in DC circuits or in
        100% power factor AC circuits.

DESCRIPTION:
        This function uses Ohm's Law, which states that there is a relation-
        ship between voltage, current, resistance and power.

        Power = Current x Voltage
        Current = Voltage / Resistance
        Current = Power / Voltage
        Voltage = Current / Resistance
        Voltage = Power / Current
        Resistance = Voltage / Current

        If you want to solve for Power, Voltage, Current or Resistance, you
        only need to know 2 of the 4 values.

USE:
        Enter the values for any two parameters and the results are calc-
        ulated for the other two.



(B)  Lighting Calculation ( Zonal Cavity Method )

PURPOSE:
        Calculates the number of lighting fixtures required.

DESCRIPTION:
        The Illuminating Engineering Society (IES) has devised a flexible
        and accurate method for calculating lighting requirements, called the
        ZONAL CAVITY METHOD.


USE:
        ROOM LENGTH and ROOM WIDTH values must be entered in FEET.
        Decimal points are accepted (Ex. 125, 50.5, etc...)
        The Maximum acceptible value for each input is 1000.

        FIXTURE HEIGHT must also be entered in FEET.
        Decimal points are acceptable.

        After the above values have been entered, a second box will appear
        and internally calculated values will be displayed within the box.

        After all calculations and displays are completed in the second box,
        a third box will appear. You will be presented with a Fixture Type
        Menu. From here you can choose fixture types contained internally or
        you can choose to specify your own fixture. Fixture types stored
        internally include Recessed Incandescent, Fluorescent, and High
        Intensity Discharge. COEFFICIENT of UTILIZATION values which have
        been compiled by IES are stored internally for these fixtures.
        The internally stored fixtures are representitive of their types.
        You will get accurate results using them, but if you wish to
        use a type of fixture not available internally, you can choose to
        specify your own type. If you choose Specify, you will be prompted
        for the CU of your fixture. You will need to have the fixture
        manufacturer's CU specs. By looking at the values in the first two
        boxes you can select the correct CU for your fixture from the
        manufacturer's CU TABLE. Next you will be prompted for the number of
        LAMPS per fixture and for the LUMENS per lamp. LUMEN specs are
        available from various sources. Your electrical supply house generally
        has lamp catalogs from General Electric and other lamp manufacturers
        which will list LUMEN values for their line.

        After the fixture type (internal or specify) has been selected and
        the prompts have been answered, the program will calculate the
        required quantity of fixtures and display the result on screen.

        From here you can choose to perform another lighting calculation by
        pressing the ENTER key. Or you can escape to the Main Menu by
        pressing the ESC key.


(C) Voltage Drop Calculator :

PURPOSE :
        Calculates the voltage drop on single phase or polyphase AC circuits.
Copper and aluminum conductors from #14 to 2000 mcm are supported.


DESCRIPTION :
        The Voltage Drop Calculator asks whether or not the load is single
        phase, the length of the run, the source voltage, the load amperage,
        and the wire conductor size and material.
        The resultant calculation is based on the Ohms/mil/ft of the
        specified conductor size and material, together with the rest of
        the user inputted values.

USE :
        At the prompt " Is load Single Phase ?", if you answer no it is
        assumed to be three phase.
        The RUN LENGTH is the length in feet from the final overcurrent
        device to the load terminals.
        The SOURCE VOLTAGE is the voltage measured at the final overcurrent
        device.
        The AMPERAGE is the current which would be used by the load if
        distance were not taken into account. For example, if the load is a
        resistance heater requiring 10 amps to operate as designed, then
        the AMPERAGE would be entered as 10.
        The WIRE SIZE is in the range of #14 awg to 2000 mcm. Do not include
        the # sign or the letters mcm. At the prompt, enter the numeric size
        of the wire (ex. 14, 1/0, 250, 750).
        The COPPER or ALUMINUM prompt is self explanatory.

        After entering the above values, the program will calculate and
        display on screen:
        1. The VOLTAGE DROP of the circuit. (the number of volts dropped)
        2. The VOLTS AT LOAD (the voltage delivered to the load terminals)
        3. The % DROP (the percentage of the source voltage dropped)



(D) Select Wire Size Based On Percent Voltage Drop :

PURPOSE :
        Calculates the conductor size required to carry a certain load
for some distance at a certain voltage while not exceeding a specific
voltage drop percentage (types THW and THHN are supported).


DESCRIPTION :
        This function asks for values of Maximum allowable voltage drop
        percentage, conductor material, load amperage, source voltage,
        circuit length and circuit type. It then calculates the minimum
        allowable conductor size required.

USE :
        DESIRED % VOLTAGE DROP is the maximum allowable for that calculation.
        COPPER or ALUMINUM is self explanatory.
        AMPERAGE OF LOAD is the amperage required by the load.
        SOURCE VOLTAGE is the voltage measured at the final overcurrent device.
        LENGTH OF RUN is the distance in FEET from the final overcurrent
        device to the load terminals.
        The circuit type (single phase, 3 phase-3 wire, or 3 phase-4 wire)
        is whichever type is applicable to the particular circuit.

        After entering values for the above parameters, the program will
        calculate and display on screen, the correct conductor size required.



(E) Calculate Cost To Operate Various Loads :

PURPOSE :
        Calculates the cost to operate a certain load a number of hours daily
        for some number of days at a certain KWH utility charge.

DESCRIPTION :
        Self explanatory.

USE :
        POWER OF LOAD is the number of WATTS the load draws.
        DAILY USE is the number of HOURS the load is operated per day.
        NUMBER OF DAYS is the number of days the load is operated.
        PRICE / KWH is the utility charge per killowatt hour.

        After entering the above information, the program calculates and
        displays the dollar cost to operate the load for the number of
        hours daily for the number of days at the chosen utility charge.




(F) Conduit Size Selector :


PURPOSE :
        Calculates the trade size of conduit required for a group of conductors.

DESCRIPTION :
        The Conduit Size Selector allows you to quickly and accurately
        determine the conduit size required for 1 or more conductors.
        Results are based on the 1988 National Electric Code.
        Calculations are based on the Dimensions and Percent Area of
        Conduit and Tubing from table 4 of the NEC. Maximum allowable
        percent conduit fill is 53% for 1 conductor, 31% for 2 conductors
        and 40% for more than 2 conductors, as per table 4. These percentages
        are built into the program's calculation procedure.

USE :
        Move cursor block to the desired wire size/type position then enter
        the quantity of that size/type to include in the conduit.
        At this point you can press ENTER to record that entry or you can
        abort that entry by moving the cursor block with the direction keys.
        You can use the BACKSPACE key to edit the entry at any time.
        If you want to include other size/types of conductors into the same
        conduit, then repeat the above procedure. You can enter any combination
        of conductors in the same conduit.
        When you are finished entering, press the CONTROL and END keys
        together. The program will then list all the conductors you chose for
        the calculation then calculate the required trade size conduit required.


(G) Device Box Fill Calculator :

PURPOSE :
        Calculates the minimum size device box to be used.

DESCRIPTION :
        Each conductor in a device box must have free air space around it.
        The Device Box Fill Calculator asks for the quantity and size of
        conductors and whether any clamps, devices, etc, are contained in
        the box. Based on this information, it calculates the total cubic
        inch capacity required, and chooses a box from each type (3x2, FS,
        4" square, etc..) which can be used.

USE :
        At the prompts, enter the quantity of the conductors.
        Pressing the ENTER key without first typing in a value inputs a
        quantity of 0 for that size. When prompted for the inclusion of
        any studs, clamps, devices, etc, enter a Y or N response.

        The program will then print to the screen the minimum size device
        box which may be used from each device box type.



(H) System Grounding Electrode Conductor Table :

PURPOSE :
        To determine the proper grounding electrode conductor size.

DESCRIPTION :
        Table 250-94 from NEC

USE :
        Self explanatory.


(I) Equipment Ground Conductor Table :

PURPOSE :
        To determine the required size equipment ground conductor.

DESCRIPTION :
        Table 250-95 from NEC.

USE :
        Self explanatory.


(J) Underground Cover Table :

PURPOSE :
        To determine the minimum cover requirements of underground cable,
        conduit, and other raceways.

DESCRIPTION :
        Table 300-5 from NEC.

USE :
        Self explanatory.


(K) KW to Ampere Tables :

PURPOSE :
        To quickly convert single and poly phase KW values to ampere values
        and vice versa.

USE :
        Self explanatory.


==============================================================================
==============================================================================


             ----------  REGISTRATION AND UPGRADE  --------

        If you are finding ELECTRC5 useful in your job planning and
designing tasks, please take the time to support the many hours of designing,
coding, debugging, testing and upgrading of this program. Your registration
entitles you to an expanded version on disk.
The expanded version, (ELECTRC6), includes all the functions of ELECTRC5,
plus these additions:

        An expanded version of the Lighting Calculator which is 100%
        compatible with the Illuminating Engineering Society's Zonal
        Cavity Method of lighting calculation.


        A pipe and wire selector which will prompt you for the type, rating,
        length, desired maximum voltage drop, etc... , of any load circuit,
        then automatically calculate and report the required wire size and
        trade size conduit required (THW and THHN).


        A price comparator which uses the results of the pipe and wire
        selector calculations and displays the total cost of using THW
        and also THHN conductors. You select the desired type of raceway
        and the quantity of fittings, and costcomp searches data files
        for trade prices and calculates and displays the total costs.
        The data files are in ASCII format, and can easily be modified
        by you with any word processor to reflect your actual cost from
        your supply house. Costcomp currently supports E.M.T., Galvanized,
        and P.V.C. conduits and associated fittings and sweeps.



================================================================================


        Once again, thanks for using and supporting ELECTRC5.
        As always, any questions, comments and suggestion are welcome.
        Registration fee $35.00.


        Robert J. La Capra
        50 Hillside Terrace
        Andover, NJ 07821