Am2 safe isolation advice

[Pat H]

If they felt you were unsafe they will have stopped you then ant there. If you completed till the end then there should have been no safety issues.

 

[Deleted member 26818]

I'm intrigued Spinlondon, what does the 12 step involve? I'm always responsive to suggestions which improve health & safety in addition to the standard practices.

This was the way I was personally taught in college, the 10 steps only apply to the combination of the conductors (E-N, E-L1, E-L2, E-L3, N-L1, N-L2, N-L3, L1-L2, L2-L3, L1-L3) but doesn't include the other considerations (such as lock-off & tag out, proving AVI before and after, asking for permission, etc) as previously mentioned.

The two checks to prove the voltage tester, before and after.

 

[I2C]

The two checks to prove the voltage tester, before and after.

Completely agree with you Spinlondon! Checking the functionality of the AVE is often forgotten, while extremely important.

The "10 steps" I mentioned only refer to the number of conductor-combinations tested, rather than every step taken during a proper safe-isolation procedure. It's a great method for students (which I used myself during college) to count each combination tested to ensure completeness, providing all other steps have been followed.

Interestingly, I've met many domestic-electricians who don't perform safe-isolation correctly. Most recently, an experienced electrician hilariously told me not to test between line-CPC or neutral-CPC because it will trip the RCD. I re-informed him that the AVI that I was using has an internal-resistance of 200,000 Ohms (as per the datasheet), and basic Ohm's Law calculates the resulting current to be less than 2mA which is incapable of tripping a 30mA RCD.