Showing posts with label design. Show all posts
Showing posts with label design. Show all posts
Sunday, May 26, 2013
Building Electrical Design Order
a. Select voltage, phase
b. Do lighting calculation and layout lighting
c. Do heating calculations and select equipment
d. Lay out outlets
e. Circuit any special equipment
f. Fill out load calculation sheets and size panel
g. Make up panel directory
h. Balance panel
i. Size feeders to panel (just like branch circuits. 80% loaded wire same size or larger than ampacity of main breaker. 6/14/02 Chapter 3: NEC CODE Rules and Design Practice 7/13
j. Size grounding conductors
k. Fire alarm circuits must be tapped ahead of main breaker with a separate panel.
l. Do short circuit calculations,
Read the rest entry[...]
b. Do lighting calculation and layout lighting
c. Do heating calculations and select equipment
d. Lay out outlets
e. Circuit any special equipment
f. Fill out load calculation sheets and size panel
g. Make up panel directory
h. Balance panel
i. Size feeders to panel (just like branch circuits. 80% loaded wire same size or larger than ampacity of main breaker. 6/14/02 Chapter 3: NEC CODE Rules and Design Practice 7/13
j. Size grounding conductors
k. Fire alarm circuits must be tapped ahead of main breaker with a separate panel.
l. Do short circuit calculations,
Tuesday, April 2, 2013
Ding Dong Door Bell Circuit Design using 8021 2 IC
The following schematic shows a Ding Dong Door Bell Circuit Design using 8021-2 IC. The 8021-2 IC is an 8-pin DIP having an in-built circuitry to produce dingdong sound each time its pin 3 is pulled low. The Ding Dong Door Bell Circuit Design consists of: On-Off Switch, 3Volt Battery, push to on switch, speaker, transistors and resistor.
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