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 20 replies
Subscribers 42 subscribers
Views 3798 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

Borrowing a cpc from another cct for lighting cct coded C2 in PE magazine codebreakers.

hertzal123 over 3 years ago

Just read in the above February mag the sparks has borrowed the cpc

from another cable in the process of changing a kitchen into a utility room.,because the

lighting cct had no cpc.

Thought this was allowed under 543.1.2 if the borrowed cpc was of adequate size?

The article states"the 2 circuits are no longer seperate or individually isolatable,as they are

now linked".

Regards,

Hz

Parents

0 OlympusMons over 3 years ago

The article quotes regs 134.1.1 "good workmanship", "proper materials" and "manufacturers' instructions" so i don't see the relevance of that, and 314.4 "... The wiring of each final circuit shall be electrically separate from that of every other final circuit, so as to prevent the indirect energizing of a final circuit intended to be isolated". So the potential danger is working on something live which you believe to be isolated, and just means the live conductors, surely not the CPC.

Also you are allowed to share CPCs in 543.7.2.201(c) between two identical circuits having high protective conductor currents
Cancel
Vote Up 0 Vote Down

Cancel

Reply

0 OlympusMons over 3 years ago

The article quotes regs 134.1.1 "good workmanship", "proper materials" and "manufacturers' instructions" so i don't see the relevance of that, and 314.4 "... The wiring of each final circuit shall be electrically separate from that of every other final circuit, so as to prevent the indirect energizing of a final circuit intended to be isolated". So the potential danger is working on something live which you believe to be isolated, and just means the live conductors, surely not the CPC.

Also you are allowed to share CPCs in 543.7.2.201(c) between two identical circuits having high protective conductor currents
Cancel
Vote Up 0 Vote Down

Cancel

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.