The IET is carrying out some important updates between 17-30 April and all of our websites will be view only. For more information, read this Announcement

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 150 replies
  • Subscribers 31 subscribers
  • Views 12095 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

IEC 60364 Table 48A

Former Community Member
Former Community Member
Does anyone know where I can find table 48A? I am reading of its existence, but don't know where to find it.
Parents
  • 0
    Right, where you would have a double insulated tool, which is not capable of becoming live ie made of plastic.

    Which is fine for indirect contact/fault protection, but 30mA RCDs also provide protection under direct contact situations - e.g. damage to the appliance's flex exposing the conductors.


    It's also hard to control loop impedances where long thin extension leads are in use - it doesn't take a huge amount of 0.75mm² orange flex running down the garden to get to the point where neither the MCB nor the plug fuse will reliably provide 0.4s (let alone 0.2s) disconnection.


       - Andy.
Reply
  • 0
    Right, where you would have a double insulated tool, which is not capable of becoming live ie made of plastic.

    Which is fine for indirect contact/fault protection, but 30mA RCDs also provide protection under direct contact situations - e.g. damage to the appliance's flex exposing the conductors.


    It's also hard to control loop impedances where long thin extension leads are in use - it doesn't take a huge amount of 0.75mm² orange flex running down the garden to get to the point where neither the MCB nor the plug fuse will reliably provide 0.4s (let alone 0.2s) disconnection.


       - Andy.
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