Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 48 replies
  • Subscribers 27 subscribers
  • Views 1278 views
  • Users 0 members are here
Options
You may also be interested in
This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

Ever thought about ... ?

gkenyon
I was asked a series of interesting questions this week about fault protection and overload protection for a particular application. Some of these really make you think, and the physics doesn't always lead you where you think you'd go.


Dropping out of all this, was me pointing out something interesting which I wonder whether it's ever crossed the minds of contributors to this Forum ... so here goes.


Ever thought about what, in typical UK installations, protects the electronics in a plug-in [to a standard BS 1363-2 socket-outlet] phone charger / wall-wart type power converter against:

(a) Fault current (consider both cases of L-N and L-PE); and

(b) Overload current ?




Parents
  • 0
    What sort of question is that to ask of a guy with a lightning charger lead dangling over the arm of the settee immediately next to him?


    Being an Ipad lightning lead the terminals are exposed to touch and every so often I feel a tingle when I put by bare elbow on it, guess what it is plugged into?


    Yes I do think about what protects the electronics and I have it in mind there’s a standard which is being or has been rewritten, so maybe the older USB wall sockets aren’t as good as they could be.


    I am suspecting the answer you are looking for is, not a lot.

Reply
  • 0
    What sort of question is that to ask of a guy with a lightning charger lead dangling over the arm of the settee immediately next to him?


    Being an Ipad lightning lead the terminals are exposed to touch and every so often I feel a tingle when I put by bare elbow on it, guess what it is plugged into?


    Yes I do think about what protects the electronics and I have it in mind there’s a standard which is being or has been rewritten, so maybe the older USB wall sockets aren’t as good as they could be.


    I am suspecting the answer you are looking for is, not a lot.

Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines