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July 27th, 2015 10:25 AM #11
+101 earth grounding is the only solution here. home appliances earth grounded prevent electric shocks as well.
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+101 earth grounding is the only solution here. home appliances earth grounded prevent electric shocks as well.
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July 27th, 2015 01:20 PM #12
yup. 'yan ang sigurado.
halos lahat ng surge protector ay merong earth grounding (UL Standard, Style B Receptacle, 2P + E).
pero meron pa ring mga AVR na walang earth grounding (CEE - UL TYPE, Style A Receptacle, 2P).
just to be safe, 'yung AC outlet sa bahay, the AVR, and the Surge Protector should have
the "2P + E" or the 3-prong configuration.
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July 27th, 2015 02:31 PM #13Surge protector not connected on the mains earth ground is still useless. The mains receptacle where you connect these avr/surge protecter should be connected to a 3-prong with real earth-ground. These protecter devices are just varistors, varicaps, gas discharge fuses that clips ovetvoltages and routes statics in milliseconds range to the earth ground so they are useless without earth-ground. Those AVRs with motorized regulator are also useless on electronic devices because they are soo slow cant react in milliseconds range.
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July 27th, 2015 04:26 PM #14
+1 here. Pwede naman DIY kung paano i-ground ang a/c oultet ng bahay. search lang sa google pero ingat lang baka mapahamak tayo.
bro 12vdc, pansin ko sa mga post natin knowledgeable ka sa electricity. are you an electrical engr by profession?
hingi sana ko sayo ng advise. ex. may 6 to 10 LEDs. plan ko ang soure ng power supply ay sa A/C. series o parallel ba ang interconnection ng LED? ilan ohms ang resistor at may other components need pa ba? TIA
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+1 here. Pwede naman DIY kung paano i-ground ang a/c oultet ng bahay. search lang sa google pero ingat lang baka mapahamak tayo.
bro 12vdc, pansin ko sa mga post natin knowledgeable ka sa electricity. are you an electrical engr by profession?
hingi sana ko sayo ng advise. ex. may 6 to 10 LEDs. plan ko ang soure ng power supply ay sa A/C. series o parallel ba ang interconnection ng LED? ilan ohms ang resistor at may other components need pa ba? TIA
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July 27th, 2015 05:14 PM #15Yup.im into those ee/ece, and a frustrated mechanic
The limiting resistor will always depend on the specification of your LED(forward voltage and current)Depending also with your circuit design, you could do it in series or parallel. Just imagine the LED xmas lights, input is AC but then converted to DC before driving the LEDs in series thru a Voltage/current trimming ckt like TRIAC. My advise is, always use a step-down voltage and isolate them in DC for your safety. Aside from LED not happy operating on AC because of low reverse breakdown voltage that could burn them, its more manageable working on DC. Ex. A typical miniature LED with 3v forward voltage and 20ma current could be safely be driven by a 1kilo ohm resistor connected to your car's battery.
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August 1st, 2015 09:41 PM #16
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August 1st, 2015 10:13 PM #18You need a grounding rod. Comes in brass copper or anodized galvanized steel 5,6,8,10 ft at local electrical hardware. Drive that into the earth preferably water ground level. Connect/bond a gauge2-4 wire depends on what you are protecting, typical entrance facility at 100-200A), then connect the other end into a copper ground-bus bar for the distribution. Distribution is inside the circuit breaker box, if the existing wiring layout has no provision(3rd wire for gnd) then be creative to layout a separate wire run. It should read <4ohms at any point of your house, add additional ground rod to the opposite side if wire run is longer exceeding 4ohms. If you have a tower/mast, that should be grounded separately ideally <1ohm because direct lightning hit is very likely.
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August 1st, 2015 11:52 PM #20
^if your LEDs are of the hi-intensity type the typical current requirement will be 100mA.
2V divided by 0.1A will give you a resistance value of 20ohms
A low intensity LED will typically require 1mA current for 2kohms resistanceLast edited by kisshmet; August 1st, 2015 at 11:56 PM.
Did some independent research and decided to go with the white pearl crystal.... para maiba naman. ...
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