FP Cable Is Not Always Suitable

[shanky887614]

Take it to work and IR it mate, just out of interest.

I did take the other one to work and did ir it, got about 60Mohm.

to be honest I didnt cut any off coil or try to get any moisture out of it first before I made end of so who knows.

this one should have a lot higher reading?

it was a little odd because it fluctuated from 50mohm to > 299 at 500v. im guessing batteries in tester could be low because didnt get constant reading

 

[telectrix]

I did take the other one to work and did ir it, got about 60Mohm.

to be honest I didnt cut any off coil or try to get any moisture out of it first before I made end of so who knows.

this one should have a lot higher reading?

it was a little odd because it fluctuated from 50mohm to > 299 at 500v. im guessing batteries in tester could be low because didnt get constant reading

or there may be a slight bit of moisture there and the IR test is drying it out, thus readings will rise as you keep the tester on it.

 

[Engineer54]

Originally Posted by shanky887614
I did take the other one to work and did ir it, got about 60Mohm.

to be honest I didnt cut any off coil or try to get any moisture out of it first before I made end of so who knows.

this one should have a lot higher reading?

it was a little odd because it fluctuated from 50mohm to > 299 at 500v. im guessing batteries in tester could be low because didnt get constant reading

or there may be a slight bit of moisture there and the IR test is drying it out, thus readings will rise as you keep the tester on it.

The correct method of IR testing a new circuit/build is by applying the test voltage for a minimum of 1 minute... Most electricians, will if you're lucky IR test for 10 to 20 seconds. lol!!

 

[shanky887614]

The correct method of IR testing a new circuit/build is by applying the test voltage for a minimum of 1 minute... Most electricians, will if you're lucky IR test for 10 to 20 seconds. lol!!

thanks for that, I have never heard anyone mention that and nothing at college etc.

 

[Engineer54]

thanks for that, I have never heard anyone mention that and nothing at college etc.

Tut. tut!! They don't seem to be teaching much at all at college these days....

 

[shanky887614]

Tut. tut!! They don't seem to be teaching much at all at college these days....

they only teach the questions/answers that are in the exam now, only reason I didnt need any resists in final year was I studied off my own back online.

everyone else needed a resist or really struggled.

one question in jtl test was how deep is recommended for a bore hole for the average sized house.

no mention in revision books etc that we were supplied with etc and even tutors were clueless when I mentioned it after exam

 

[Engineer54]

Bore hole, ..bore hole for what??

 

[shanky887614]

Bore hole, ..bore hole for what??

ground source heat pump.

renewable crap in the new nvq

 

[telectrix]

thought a bore hole was where you put the father-in-law when you couldn't take any more of his verbal diorrhea.