Does a CPC require mechanical Protection | Page 2 | on ElectriciansForums

Discuss Does a CPC require mechanical Protection in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

Reply to #14

No it doesn’t because the lines of magnetic flux in the conduit will be at 90°
to the CPC current.
 
I think you'll find that this earth conductor is not a CPC (circuit protective conductor), but a bonding conductor linking the existing flats METs, making them in effect EMTs hopefully with a MET at the origin of the installation.


Now as both the conductor and the conduit are supposedly connected to these EMTs, any fault current flowing, will be carried by both the conductor and the conduit. At a disconnection time of a theoretical 0.4 sec, i doubt if a circulating current if any, would even have a chance to form.
 
Sorry I asked, (only joking) brought up some intresting points. To be honest I just needed a get out as the spec is to link the MET'S and what is the cheapest way. Therefore as long as it's bigger than 4mm and clipped high enough that it can't be swung and nicked we will be fine.
 

Reply to Does a CPC require mechanical Protection in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

News and Offers from Sponsors

  • Article
Hi everyone, If you are looking for reliable EV chargers, check out our top-rated selection at E2GO! ⚡ Please note that all EV Chargers and...
Replies
0
Views
114
  • Article
As the holiday season approaches, PCBWay is thrilled to announce their Christmas & New Year Promotions! Whether you’re an engineer or an...
Replies
0
Views
910
  • Article
Bloody Hell! Wishing you a speedy recovery and hope (if) anyone else involved is ok. Ivan
    • Friendly
    • Like
Replies
13
Views
1K

Similar threads

Good question now to start with thermosetting insulated conductors are not tri-rated that is something different. Table 4E1A deals with this type...
Replies
1
Views
283
  • Question
In the current book (18th, amendment 2) it is under regs 433.2 and 434.2 In most domestic situations the usual approach is the whole circuit is...
Replies
3
Views
744

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

YOUR Unread Posts

This website was designed, optimised and is hosted by untold.media Operating under the name Untold Media since 2001.
Back
Top