Discuss Test results, lighting circuit in the Electrical Forum area at ElectriciansForums.net

Welcome to ElectriciansForums.net - The American Electrical Advice Forum
Head straight to the main forums to chat by click here:   American Electrical Advice Forum

Reaction score
8
Evening all. I’m struggling al little bit; doing a light installation (extra outdoor light). Upon undoing existing fixing I found there’s no CPC. Seems no CPC on any of the lights (even though there’s an earth in the DB). So, how would I get my R1 and Rn readings? I’m proper stuck so any help or ‘talk throughs’ would be greatly received.
 
Your problems are the cpc of your new cable has no continuity to the main earth terminal. You are therefore not satisfying the requirements for ADS even if additional rcd protection is in place which it should be assuming this is domestic. Check first saves a whole load of grief later.
Are you 100% sure there are no cpcs present through the rest of the circuit, possible they have just been cut off.
 
Last edited:
I’m going
I would suggest thats referring to a pendant from a ceiling rose, or luminaire using said pendant.

All other wiring points require a cpc.
I’m going to explain fully to customer what needs to be done before anything moves forward. Appreciate all the advice; probably lose the job but at least I’ve not cut corners to make a buck.
 
rewire your outside light from socket circiuit (or any circuit with a cpc) via a 5A FCU. bear in mind that you also need RCD protection for luminaiires as of 1st January.
 
I would suggest thats referring to a pendant from a ceiling rose, or luminaire using said pendant.

All other wiring points require a cpc.

Not saying you're wrong, but how did you draw that conclusion? The BBB does specifically mention pendant sets and batten lampholders in a number of places, but not in this instance.
 
The last sentence of 411.3.1.1 suggests otherwise for lamp holders without exposed conductive parts. However, you will need a CPC at the switch.
Whilst the Class II lampholder suspended from a Class II point wouldn't require one, there still has to be one at the Class II luminaire. It just means you don't need a three core flex into the lampholder.
 
Whilst the Class II lampholder suspended from a Class II point wouldn't require one, there still has to be one at the Class II luminaire. It just means you don't need a three core flex into the lampholder.

Aha, I see now! Thanks for the clarification.
 

Reply to Test results, lighting circuit in the Electrical Forum area at ElectriciansForums.net

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

Electrical Forum

Welcome to the Electrical Forum at ElectriciansForums.net. The friendliest electrical forum online. General electrical questions and answers can be found in the electrical forum.
This website was designed, optimised and is hosted by Untold Media. Operating under the name Untold Media since 2001.
Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock