Advice on insulation resistance test procedure :)

[LittleHelper]

Hi guys,

I would just like to ask if any one could look at my test procedure off the top of my head and give any advice or pointers or whether its too long winded or short. got an exam in 2 weeks so trying to drill it in to this thick skull
Many thanks

Safe Isolation has been carried out:

• Seek permision , Inform client and relevant persons that test is about to be carried out
• Make area safe by putting up barriers and warning notices
• Disconnect lamps and link out or disconnect other sensitive devices that may be vulnerable to test voltages
• Select an insulation resistance tester, Check tester is calibrated, leads show no sign of damage, and that tester is functioning.
• Select the Megaohm range set at 500V DC
• Identify circuit to be tested, and test between Live - Neutral and record result. Do the same test between Live - Cpc and Neutral - Cpc record results.
• Expected result a minimum of 2 M/ohm.
• Reinstate circuit

 

[telectrix]

you have not mentioned safe isolation and lock off. that should be your 2nd bullet point. ... prove volage tester, isolate, prove dead... before you connect IR tester.

 

[trev]

Megohms not megaohms, your terminology is very important mate. Everything you need to know is in GN3 so stick your head in that and only come up for air.

 

[Octopus]

Would you test at 500v or do a 250v check first?

 

[LittleHelper]

you have not mentioned safe isolation and lock off. that should be your 2nd bullet point. ... prove volage tester, isolate, prove dead... before you connect IR tester.

Thanks for response telectrix I stated that safe isolation has been carried out in the scenario

 

[LittleHelper]

Megohms not megaohms, your terminology is very important mate. Everything you need to know is in GN3 so stick your head in that and only come up for air.

Thanks trev i would have stumbled onsome basic stuff there nice one

 

[LittleHelper]

Would you test at 500v or do a 250v check first?

Very true but if i knew i had all vulnarable equipment disconnected or linked out then i would go straight on to 500V

 

[trev]

Very true but if i knew i had all vulnarable equipment disconnected or linked out then i would go straight on to 500V

It's always a good idea to do a soft test first just to make sure.

 

[LittleHelper]

I agree trev. do you think it would be ok in the exam to state:
I would first test at 250V then test at 500V or would they prefer the setting of 500V

 

[LittleHelper]

I suppose stating the soft test would show more precautionary knowledge!

 

[telectrix]

a continuity test L-N could be done first to ascertain if any loads are still in circuit. then a 250V, finally a 500V. and if a plumber or plasterer is working in the vicinity, give it 1000V. LOL.

 

[LittleHelper]

a continuity test L-N could be done first to ascertain if any loads are still in circuit. then a 250V, finally a 500V. and if a plumber or plasterer is working in the vicinity, give it 1000V. LOL.

Lol i feel sorry for any apprentice of yours

 

[pencilpusher]

Lol i feel sorry for any apprentice of yours

With all the things Tel does to them (check out his previous posts!), they don't last long enough to feel sorry for! :bucktooth:

 

[RyanCheetham]

Anyone else seen the video on you tube of tha8t guy meggering his ears?

 

[telectrix]

wasn't that paul m?

 

[RyanCheetham]

I was talking about this fella http://m.youtube.com/results?q=megger%20ears#/watch?v=8whQKK4Q-u8

 

[telectrix]

sounds like a good idea for an alarm clock.

 

[RyanCheetham]

sounds like a good idea for an alarm clock.

Not sure i would like to trial it

 

[chocca]

We found a dog training collar for nuisance barking that consisted of a microphone and 2 probes built into a collar. Decided it looked a bit dodgy for the mutts but stepson decided we were too soft, strapped it rouond his neck and started barking. Funniest thing I've seen when the collar zapped him and he went down like a sack of spuds and lay twitching on the living room carpet. Must have the zap-ability of a taser! So glad we didn't try it on the dogs first lol!

 

[trev]

We found a dog training collar for nuisance barking that consisted of a microphone and 2 probes built into a collar.!

I'm glad you didn't put it on your dog mate, I think those things are barbaric and should be banned