ZS Downlights

[Nicktric]

Hi I know this is a debatable topic looking at other threads so sorry to put the cat amongst the pigeons again... If you want to ZS a light circuit I know you can use Ze + (R1 +R2) but I think it's good practice to Zs to eliminate faults such as connection at CU, switch faults etc. Anyway, with a three lead test no probs with a ceiling rose but with downlights if I don't want to pull every one down because of time and risk the clips damaging the pboard, is the only way a BC adaptor and then wander lead to the cpc in the light switch as opposed to a 2 lead which may trip RCD? What's the quickest/best way?
Thanks

 

[Deleted member 26818]

What sort of downlights?

 

[keniff]

If they are metal the case should be earthed and go on the last fitting

 

[Deleted member 26818]

What if they're SELV?

 

[keniff]

Then just do the test on the last light and u wouldn't have the adapter for the tester on selv type so is obvious

 

[Nicktric]

Hi, metal fire rated SHower ip65 sorry not BC fitting of course but the GU10 pin type. What's the tech term for this type of fitting!? ARe you saying to clip on to the powdercoated can or pull one down for the cpc clip on with a wander lead to do all?

 

[malcolmsanford]

Even with GU10 fittings the Kewtech Lightmate gives you an adaptor for these so you could take your Zs via that

Lightmate Kit - Kewtech Lightmate Kit - Test Lights Faster with Light Mate Testing Adaptor - 17th Edition Test Equipment - 17th Edition Accessories - Kewtech Lightmate Kit - All 5 Lightmates

test-meter.co.uk are our sponsor and will give you a discount on these as well.

 

[sjm]

JCC metal fire rated downlights are double insulated so no earth connection on body.

 

[Amp David]

With SELV and double insulated fittings the only option to test is taking them down. Ask the customer first and explain, if they say no, mark it as a limitation.