Multimeter earth continuity

[Bob_T]

Hi

I am interested in making my own steel pendant light as a little project - not for sale.

The rose would be bare steel which I am going to lacquer. The ceiling rose strap has an earth and it is connected to the rose by side thumbscrews. I am going to remove some lacquer on the rose where the screwheads will sit for earth continuity of the rose.

The screws only have a small head so I wanted to check there is enough contact for earth continuity.

I have read online that the following requirements/test should be carried out:

"Maximum resistance 0.50
Measured by passing a minimum current of 10 A at between 6 V and 12 V for at least 1s"

I was wondering if this is something that a multimeter can do. Can you set the current on a multimeter? Sorry for the stupid questions I have never owned a multi meter. Alternatively would the built in continuity tests on the multi meter be satisfactory.

Cheers

 

[amlu]

standard multimeter may not have enough resolution in the low ohms range to measure it correctly. For proper results better use a continuity tester.

 

[Risteard]

standard multimeter may not have enough resolution in the low ohms range to measure it correctly. For proper results better use a continuity tester.

It also won't inject 10A.

 

[Bob_T]

Stupid question - I have never used a multimeter or continuity tester this is just a bit of a project for fun - can you select the current on these?

 

[amlu]

It also won't inject 10A.

Out of curiosity I rigged up my old AVO BM100 continuity/insulation tester to an ammeter, measured 0.2A on 2Ohms range.

 

[Risteard]

Out of curiosity I rigged up my old AVO BM100 continuity/insulation tester to an ammeter, measured 0.2A on 2Ohms range.

Not surprising - they use a current of 200mA with an open circuit voltage of between 4 and 24V DC. I think some are as low as 100mA.

 

[telectrix]

why not use a PAT tester. 20A on earth bond test.