User vu2nan

56 votes

What does this symbol on a voltmeter looking like an upside down U with a small line under it represent?

answered Aug 25, 2022 at 10:51

55 votes

Should I ground my body when working with 200V+?

answered Jul 18, 2020 at 18:44

43 votes

Accepted

Current at 12 and 230 volts

answered Nov 15, 2023 at 4:23

22 votes

Why is North American residential power called single phase?

answered Mar 12, 2022 at 19:33

21 votes

Why has my tweeter speaker burned up?

answered Feb 10, 2021 at 12:18

19 votes

Accepted

Unknown circular schematic symbol

answered Mar 14, 2022 at 11:30

18 votes

Limiting potentiometer to 10% and 90%

answered May 24, 2022 at 17:01

18 votes

Ground Symbol, which one I should use?

answered Oct 17, 2022 at 14:35

16 votes

Accepted

What happens if you feed DC into a bridge rectifier?

answered Feb 20, 2022 at 12:24

15 votes

Why do speakers use clamp connectors?

answered Apr 7, 2022 at 3:58

15 votes

Why use aluminum wire in an (old) TV degaussing harness

answered Sep 10, 2020 at 4:55

15 votes

Accepted

Do any power loads require both power lines disconnected by the "off" switch?

answered Sep 29, 2023 at 5:06

12 votes

Accepted

Source of initial magnetic field in an alternator

answered Sep 2, 2020 at 17:12

12 votes

Please help identify this potentiometer

answered Feb 22, 2022 at 4:24

11 votes

Wiring a 240 V single phase cable to two 110 V outlets (120 deg apart)

answered Jul 22, 2022 at 3:14

11 votes

Being able to toggle a 24V battery bank to 12V

answered Jun 27, 2020 at 19:16

11 votes

Why did I still have power after a tree cut the neutral wire leading to the transformer?

answered Nov 9, 2023 at 6:05

11 votes

Why these diodes on AC transformer?

answered Aug 22, 2023 at 2:30

10 votes

How to detect movement of gadget without electricity

answered May 31, 2020 at 12:32

9 votes

Is this a variable resistor?

answered Oct 9, 2020 at 17:17

9 votes

Why does this AM radio circuit not work?

answered Mar 12 at 5:27

9 votes

Accepted

Which would be better to control a 1 hp, 6 A water pump motor? Time relay or magnetic contactor?

answered Sep 16, 2022 at 11:05

9 votes

Three-phase motor Delta/YY connection diagram and windings troubleshooting

answered Mar 22, 2023 at 6:36

8 votes

Is Ohm's law really accurate?

answered Jan 8, 2023 at 10:00

8 votes

What will happen if a bulb is connected to two live wires?

answered Apr 14 at 10:17

8 votes

Relay which opens very infrequently

answered Aug 21, 2023 at 5:24

8 votes

Trying to determine what this small glass-enclosed item is

answered Jun 28 at 6:16

8 votes

In below picture, is ammeter AC or DC? Is there direction for connection with load in series? If so what if I connect in wrong direction?

answered Apr 11, 2020 at 13:59

8 votes

Accepted

How can I achieve full scale deflection on a 30 A ammeter with a 5 V voltage?

answered Jul 29, 2022 at 8:31

8 votes

What is the name for this connector socket pin configuration?

answered Apr 2, 2022 at 8:04

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939 Answers

What does this symbol on a voltmeter looking like an upside down U with a small line under it represent?

Should I ground my body when working with 200V+?

Current at 12 and 230 volts

Why is North American residential power called single phase?

Why has my tweeter speaker burned up?

Unknown circular schematic symbol

Limiting potentiometer to 10% and 90%

Ground Symbol, which one I should use?

What happens if you feed DC into a bridge rectifier?

Why do speakers use clamp connectors?

Why use aluminum wire in an (old) TV degaussing harness

Do any power loads require both power lines disconnected by the "off" switch?

Source of initial magnetic field in an alternator

Please help identify this potentiometer

Wiring a 240 V single phase cable to two 110 V outlets (120 deg apart)

Being able to toggle a 24V battery bank to 12V

Why did I still have power after a tree cut the neutral wire leading to the transformer?

Why these diodes on AC transformer?

How to detect movement of gadget without electricity

Is this a variable resistor?

Why does this AM radio circuit not work?

Which would be better to control a 1 hp, 6 A water pump motor? Time relay or magnetic contactor?

Three-phase motor Delta/YY connection diagram and windings troubleshooting

Is Ohm's law really accurate?

What will happen if a bulb is connected to two live wires?

Relay which opens very infrequently

Trying to determine what this small glass-enclosed item is

In below picture, is ammeter AC or DC? Is there direction for connection with load in series? If so what if I connect in wrong direction?

How can I achieve full scale deflection on a 30 A ammeter with a 5 V voltage?

What is the name for this connector socket pin configuration?