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    Adding a light in parallel to existing loudspeaker circuit

    Thank you for your answer, I decided not to try to connect the light in parallel to the speaker, but rather to control output from the controller.
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    Adding a light in parallel to existing loudspeaker circuit

    First of all, thank you for your comprehensive answer. Since it seems like a lot of hustle, I am just gonna run the cable to controller and do it like that. But to answer your questions... All the speakers in the zone act the same and are activated when an announcement is made. There is so...
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    Adding a light in parallel to existing loudspeaker circuit

    I work on a ship which has Public Announcement (PA) system. PA system consists of a couple of zones. Each zone has an a controller, amplifier and a loudspeakers circuit. In our case, PA system is only used to make announcements and play alarm, not music. What I need to do is to add a light...
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    The simplest definition of VOLTAGE you can come up with

    I apologize for offending you in any way, I agree that some of the things I asked should have been googled instead of posted on the forum.
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    The simplest definition of VOLTAGE you can come up with

    Thank you for answering, sir.
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    The simplest definition of VOLTAGE you can come up with

    Thank you for your effort, sir.
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    The simplest definition of VOLTAGE you can come up with

    So, what is voltage without electrons? What kind of particle is it?
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    The simplest definition of VOLTAGE you can come up with

    What is potential?
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    The simplest definition of VOLTAGE you can come up with

    Thank you for your answer. So, for example, what does 220VAC between 2 lines mean? That 220VAC is the amount of work required to move a unit of charge from one line to another? How come I get electrocuted when I touch the line if there is some work required to move a charge?
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    The simplest definition of VOLTAGE you can come up with

    I've measured it thousands of times, talked about it hundreds of times, but never reaaaaally understood it. All those definitions seemed so complex, as if they are trying to make the voltage seem so mysterious. So, after a little bit of thinking, I think the simplest definition of voltage I...
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    'Frosting' on top of Ni-Cd batteries

    Definitely Ni-Cd batteries, installed in August 2018, still have a battery brochure.
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    'Frosting' on top of Ni-Cd batteries

    Just wondering what this "frosting" on the Ni-Cd battery cap could be? How is it created? Is it dangerous? Should it be removed? Check the pic below.
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    Help with reading UPS drawing

    Hi davenn, Thank you for your reply. I didn't find any tools to increase the size of the picture, unfortunately, but after you click on the picture, you can choose to open it in the new window (if you click on the "diagonal arrow" in the upper right corner) and then you can zoom in on the...
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    Help with reading UPS drawing

    Hello, everybody, this is my first post. I would like to ask for help with analysing drawing of a certain UPS. This UPS converts 3-phase 440VAC to 48VDC. It would mean a world to me if someone could try to explain what they see in this drawing. I get stuck really quickly. All I see is the...
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