Electricians Forum | Electrical Forum | An electrical forum for electricians in the UK - View Single Post - Testing Zs at Lighting switch's with no neutral

Malcg · 18-04-2008

Hi
R1+R2 is only available at light drop / ceiling rose (also much easier to do).

Switch off main switch. Temp short MCB live to earth. at furthest rose, test using two leads (as L & E available).

Record result and remove temp link.

As shown on page 217/218 NICEIC Inspection, Testing, Certification and Reporting.

Hi

Also if you want to include switch drop, still test at ceiling rose with light switch on. Use Switch live, Neutral and earth. Then you get longest path of Live.

18-04-2008	#14 (permalink)
Malcg Junior Member Join Date: Apr 2008 Posts: 19	Re: Testing Zs at Lighting switch's with no neutral Hi R1+R2 is only available at light drop / ceiling rose (also much easier to do). Switch off main switch. Temp short MCB live to earth. at furthest rose, test using two leads (as L & E available). Record result and remove temp link. As shown on page 217/218 NICEIC Inspection, Testing, Certification and Reporting. Hi Also if you want to include switch drop, still test at ceiling rose with light switch on. Use Switch live, Neutral and earth. Then you get longest path of Live.
Malcg Junior Member Join Date: Apr 2008 Posts: 19	Last edited by Malcg; 05-05-2008 at 12:25 PM. Reason: Text error