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- ----------------------- ELECTRC3 -------------------------
- ********************************************************************************
-
-
-
- SYSTEM REQUIREMENTS :
- MS/DOS OR PC/DOS Version 2 or higher
- 150k of free memory
- Mono or color monitor
- 1 disk drive
- -------------------------
-
- Program Description :
-
- ELECTRC3 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.
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-
- Changes In This Update :
-
- New screen layouts
- Improved input error control
- Single key menu selections
- Conduit Selector Function has completely revised input routine
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-
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- Functions in ELECTRC3 :
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-
- (1) Dc Power/Voltage/Current/Resistance :
-
- Calculates values for two unknown values of power, voltage,
- current and resistance in DC circuits or in 100% power factor AC circuits.
-
- Enter the values for any two parameters and the results are calc-
- ulated for the other two.
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- (2) Lighting Calculation ( Zonal Cavity Method )
-
- Calculates the number of lighting fixtures required.
-
- The Illuminating Engineering Society (IES) has devised a flexible
- and accurate method for calculating lighting requirements, called the
- Zonal Cavity Method. This method assumes that any room or area to be
- lighted is made up of three cavities. The "Ceiling Cavity" extends from the
- ceiling surface down to the fixture level. the "Room Cavity" extends from
- the fixture level down to the work height level (usually desktop level).
- The "Floor Cavity" extends from the work height level down to the floor.
- Also, two of these cavities (Ceiling and Floor cavities) have
- valus of "Effective Reflectance" which are calculated based on their
- dimensions and their surface color/textures.
- Each lighting equipment manufacturer publishes data for the
- "Coefficient of Utilization" (CU) for each fixture type and size in it's line.
- The CU of a fixture is a measure of it's efficiency under specific conditions
- of room cavity values and effective reflectance values.
- In calculating the fixture requirement for an area, the above param-
- eters are combined with calculated values for "Depreciation Factor" and
- "Maintenance Factor", both of which refer to the natural light reduction
- over time due to lamp aging and dirt buildup.
- Another important part of the calculation is the "Footcandle Level".
- This is the degree of brightness you require in an area.
- Using the values from all the above calculations, the actual quantity
- of fixtures required can be accurately determined.
-
- This version of ELECTRC3 supports the Zonal Cavity Method with
- the following restrictions :
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- 1. Fixtures are assumed to be mounted flush on or recessed in the ceiling.
-
- 2. The "Work Height level is assumed to be the floor (which means the foot-
- candle level you specify is maintained at the floor instead of at the
- work height level).
-
- 3. Ceiling reflectivity is assumed to be 80 % (average for white or off white).
- 4. Wall reflectivity is assumed to be 50 % (average for pastels, tans).
- 5. Floor reflectivity is assumed to be 20 % (accurate for most colors).
-
- 6. Depreciation and Maintenance factors are assumed to be 1 (average).
-
-
- Even with the above six restrictions, this program will calculate results
- that are accurate for most general purpose applications.
-
- To proceed with a calculation, answer the prompts with the values
- for your room or area. All prompts for dimensions must be entered in feet.
- (ex... if ceiling height is 6' 6" then input 6.5 at the prompt).
-
-
- ****** See " REGISTERED USER UPGRADE " At The End Of This File. ******
-
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-
-
- (3) Voltage Drop Calculator :
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- Calculates the voltage drop on single phase or polyphase AC circuits.
- Copper and aluminum conductors are supported.
-
- This function is straightforward. Simply enter your values at
- the prompts and the results will be automatically calculated.
-
-
-
- ****** See " REGISTERED USER UPGRADE " At The End Of This File. ******
-
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-
-
- (4) Select Wire Size Based On Percent Voltage Drop :
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- 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.
-
- This function is straightforward. Simply enter your values at
- the prompts and the results will be automatically calculated.
-
- ------------------------------------------------------------------------------
-
-
- (5) Calculate Cost To Operate Various Loads :
-
- Calculates the cost to operate a certain load a number of hours daily
- for some number of days at a certain KWH utility charge.
-
- This function is straightforward. Simply enter your values at
- the prompts and the results will be automatically calculated.
-
-
- ------------------------------------------------------------------------------
-
-
-
- (6) Conduit Size Selector :
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- Calculates the trade size of conduit required for a group of conductors.
-
- 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.
-
-
- ------------------------------------------------------------------------------
-
-
-
- --- REGISTERED USER UPGRADE ---
-
- If you register your copy of ELECTRC3 you will be sent an expanded
- version, ELECTRC4, which includes all the features of ELECTRC3 plus :
-
- 1. A substantially expanded .doc file with detailed information about all
- the formulas and working principles of every function supported.
-
- 2. An expanded version of the ZONAL CAVITY METHOD lighting calculator which
- is 100 percent compatible with the IES standard. Also a built in data-
- base of CU specifications compiled by IES, which the program will
- access and use in your calculations.
-
- 3. A version of the VOLTAGE DROP CALCULATOR which allows calculations
- using a wider range of current values and conductor sizes.
-
- 4. Handy built in DEVICE BOX FILL table and GROUNDING CONDUCTOR SIZE table.
-
-
- ELECTRC4 will be available ONLY to users who register version 3.
-
-
-
- To register your copy of ELECTRC3 and immediately receive ELECTRC4,
- send registration fee ( $25.00 ) along with any comments, questions, and
- suggestions to :
-
- Robert La Capra
- 808 Downing St.
- Parlin,NJ 08859
-
-
- Thanks for trying ELECTRC3.
-
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