What does 1 MCΩ and 1 Mf2 stand for?

[DaveS]

Just wondering as these are the acceptable insulation resistance readings for SELV and PELV circuits in Guidance Note 3?. Cheers

 

[Richard Burns]

Where have you seen these written?

The minimum IR reading for SELV and PELV is 0.5 MΩ @250V

 

[Plonker 3]

Probably a fake copy of GN3

 

[northstar]

Just wondering as these are the acceptable insulation resistance readings for SELV and PELV circuits in Guidance Note 3?. Cheers

what page is it on ?

 

[DaveS]

Sorry guys didnt make myself clear. The page in question is 43 and its referring to testing IR of multicore cables. Still would be interested to know what 1 MCΩ and 1 Mf2 equates to though. Never seen it expressed like this. Cheers

 

[HandySparks]

Sorry guys didnt make myself clear. The page in question is 43 and its referring to testing IR of multicore cables. Still would be interested to know what 1 MCΩ and 1 Mf2 equates to though. Never seen it expressed like this. Cheers

What edition are you using? I have the sixth edition and can't see "1 MCΩ" or "1 Mf2" on the page. Can you post a photo of your page?

 

[DaveS]

 

[davesparks]

I think you might have a dodgy copy of GN3 there! Mine has the same cover and not those mistakes!

 

[Silly Sausage]

As Dillb said earlier, you've got a fake copy!!!

 

[DaveS]

Thanks guys. Clears that up anyway. Don't bode well for when i take exams. Bought off bloody amazon aswell. Is it quite common? take it buying straight from IET in future the best bet?

 

[Silly Sausage]

Thanks guys. Clears that up anyway. Don't bode well for when i take exams. Bought off bloody amazon aswell. Is it quite common? take it buying straight from IET in future the best bet?

If you've only just bought it, get onto Amazon straight away, they should refund you.

 

[DaveS]

I bought it a little while back to be honest Archy. I'll look at returns policy tho. C what their saying

 

[davesparks]

Contact the IET about it, they will definitely want to know

 

[shanky887614]

Thanks guys. Clears that up anyway. Don't bode well for when i take exams. Bought off bloody amazon aswell. Is it quite common? take it buying straight from IET in future the best bet?

go on amazon and contact them, they will refund etc straight away.

always check the seller through amazon, there also a market place

 

[shanky887614]

I bought it a little while back to be honest Archy. I'll look at returns policy tho. C what their saying

its a pirated book mate, they should give you your money back as it was miss sold as a genuine copy