I'm trying to figure out what wires are live, neutral and ground in my computer power cable. I'm getting some weird readings from the wires.
A - B = 51v
A - C = 117v
B - C = 65v
I'v read a bunch of articles but can't figure out what is what.
Find which wires are what in a sjt power cable
accablespower
Related Solutions
ALWAYS switch the live wire(s). If you only switch the neutral, then the entire circuit becomes live when switched off.
Switching the neutral also can add some safety in case the outlet is wired backwards. It would also allow you to give it 120-0-120 split phase later on (240v total), if it's rated for that.
Do NOT switch the ground, but you probably knew that.
In case you didn't know, neutral is actually the center tap of the utility transformer outside and is (supposed to be) connected to ground (dirt) in the breaker box and nowhere else. This is why it's okay to leave the neutral connected in most cases. However, don't be tempted to use ground to carry current just because it goes to the same place. Neutral is there because the current that it carries causes it to not be ground anymore once it leaves the breaker box.
This is country specific and standards specific
GREEN is universally accepted to be a protective earth connection
White, Blue, Brown... is odd... if it wasn't for the white it would make sense.
Related Topic
- Electrical – How are the individual homes connected in a 3 phase power distribution system (power grid) so that they have correct voltage
- Electrical – Replacing a broken 3.5mm audio jack with a different one, why does each cable have different amount of wires
- Can you use cat 5/6 ethernet cable to power devices
Best Answer
Some power supplies have line-to-ground and neutral-to-ground filter capacitors like this picture:
So line-ground and ground-neutral have half of the line-neutral voltage.
I think this is happen in your situation. So my guessing:
Try using neon screwdriver test light or test pens.