In what context do you use a CPC?

[not_today]

Gentleman,

Im reading through the forums, especially the fault finding threads in this sub and there are a lot of talk about CPC's. when someone has time could you please explain what a CPC is and when it is used?


im sorry if this sounds like an amateurish question but its because at this point i am!

Sam

 

[shanky887614]

Gentleman,

Im reading through the forums, especially the fault finding threads in this sub and there are a lot of talk about CPC's. when someone has time could you please explain what a CPC is and when it is used?


im sorry if this sounds like an amateurish question but its because at this point i am!

Sam

go start an aprentaship.

if you don't know what a cpc is you shouldnt be playing with electrics

 

[Marvo]

A CPC (circuit protective conductor) is included in a circuit for safety reasons. It allows a low impedance (low resistance) path for fault currents to flow because it is connected to earth in the CU. If a fault occurs whereby the chassis of an appliance comes into contact or partial contact with the live (low IR fault) then the low resistance of the CPC ensures the chassis stays as close to 0Volts as possible meaning anyone coming into contact with the faulty appliance doesn't receive a serious electric shock. Secondly the low resistance of the CPC to earth ensures the fault current can become high enough to trip the OCPD (over current protective device) which might be a fuse or an MCB.

 

[shanky887614]

earth to ccu (customer consumer unit) then cpc (circuit protective conductor) from ccu to circuits e.g. lights,sockets

 

[Baker1988]

Its basically there for safety incase of a fault in the circuit, you use it basically in every circuit in a installation if a fault occurs it should trip the over current device which would make the circuit dead so the person who is getting the shock or going to touch the live parts does not become dead

 

[not_today]

thank you chaps,

for the record. i am not touching any electrics. as stated in my OP i am just looking through the threads to try and learn as much as i can.

sam

 

[trev]

go start an aprentaship.

if you don't know what a cpc is you shouldnt be playing with electrics

Shanksy, when this section was set up it was agreed that there were no questions too stupid for it. It was also agreed that every question would be answered and no trainee would be flamed for asking it. This one could be in the very early days of his training for all we know mate

 

[MDJ]

Agree with trev, out of order this time IMO

 

[shanky887614]

Shanksy, when this section was set up it was agreed that there were no questions too stupid for it. It was also agreed that every question would be answered and no trainee would be flamed for asking it. This one could be in the very early days of his training for all we know mate

didnt read title, just clicked new posts as usual

 

[Baker1988]

Shanksy, when this section was set up it was agreed that there were no questions too stupid for it. It was also agreed that every question would be answered and no trainee would be flamed for asking it. This one could be in the very early days of his training for all we know mate

I totally agree that was not a very constructive answer this section is too help people I didnt know what a cpc was before I started going to college I just called it a earth

 

[shanky887614]

I totally agree that was not a very constructive answer this section is too help people I didnt know what a cpc was before I started going to college I just called it a earth

i hold my hands up, i made a mistake i thought i clicked on another diy thread as i didnt pay much attention to the location of the thread

 

[trev]

Nothing more to see here, move along

 

[Marvo]

It's great to see everyone is on the same page regarding basic questions. Shanky, no harm done mate if it was an honest mistake.

 

[not_today]

dont worry lads. its all cool! thanks for the replies everyone. plenty more silly questions to come!

going to be chasing up that apprentiship tomorrow. i had a dream on friday night that i rang on monday and it had gone!

 

[shanky887614]

if you dont get given a course book and end up buying one yourself make sure it's for

city and guild 2357 not 2330

there is still some old stock floating around since they ended the 2330 course