Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

XPcentric

macrumors 6502
Original poster
Oct 16, 2008
271
0
Its 60W, 16.5V, 3.65A

I've read that people are protected when touching the magsafe, but I'm asking about touching the wires directly. Seeking only the theoretical answer, dont need to be adviced about not to do it.
 
It's not the current that flows through the MagSafe that will kill you; it's the current you induce in yourself. A fraction of an amp will kill you, but simply touching the MagSafe is unlikely to do anything at all.
 
  • Like
Reactions: AustinIllini
Its 60W, 16.5V, 3.65A

I've read that people are protected when touching the magsafe, but I'm asking about touching the wires directly. Seeking only the theoretical answer, dont need to be adviced about not to do it.
What do you mean by "touching the wires directly"?
  1. Has the insulation come off and you can see the bare metal conductors inside the white cable that has the MagSafe on one end?
  2. Or are you talking about touching the pins on the MagSafe connector?
  3. Or has the plastic box that you plug into the wall opened up and you can see bare wires inside that?
  4. Or are you talking about the optional power cord extension that plugs into the wall outlet and also slides into the corner of the white plastic power block (once you slide the folding pins off, obviously)?
And by "deadly" do you mean by electrocution, fire risk, or some other means?
 
  • Like
Reactions: mobilehaathi
My Magsafe was repaired and it no longer has visible wires.
But my question was theoretical, about cutting the wire and touching it. Can you die doing that ?
I'm trying to asses if the current flowing through that thin cable is dangerous.
Unlike touching the wire or the ending of a phone adapter which is not deadly, I guess.
 
If you're talking about the side of the Magsafe that plugs into the computer then no, it won't kill you. It's exactly the same as touching two or more connectors on that part of the adapter.

Yes, it's true that current kills you and not voltage, but 16.5V DC is not going to push even a fraction of an amp through the human body.

Now, if you're touching the wires on the other side of the power brick, that's 120V AC and it can kill you.
 
If you're talking about the side of the Magsafe that plugs into the computer then no, it won't kill you. It's exactly the same as touching two or more connectors on that part of the adapter.

Yes, it's true that current kills you and not voltage, but 16.5V DC is not going to push even a fraction of an amp through the human body.

Now, if you're touching the wires on the other side of the power brick, that's 120V AC and it can kill you.

Even at that voltage, 120AC isn't really enough to drive a lethal current through an otherwise healthy person.

V=IR so I=V/R

Sat here with a multimeter, and a soaking wet thumb it is 300k ohms over about an inch of wet skin. It is 0.0004 Amps, or 0.4mA, at 10mA you cannot let go due to muscle contractions, breathing struggles around 20mA, 75mA is where serious breathing issues start, and iirc the heart goes nuts at 100mA.

So even with the UK at 240V you'd be extremely unlucky, or have another medical condition to die from mains voltage. This is also assuming that the safety devices in the building are also faulty.
 
Last edited:
  • Like
Reactions: JamesMike
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.