what is the MOST likely cause of high resistance when testing continuity of cpc

[paulthemagpie]

hi guys,

what is the MOST likely cause of high resistance when testing continuity of cpc?

I know likely reasons could be loose terminations, bad terminations (e.g not all wiring strands in connection), dirty connectings, ect

But what would you say is the MOST likely reason for the high resistance reading fault?

thanks magpie

 

[Deleted member 26818]

Depends how you are conducting the test.
If using a 3 pin plug lead, then corrosion in socket.
Otherwise, as you say a high resistance joint.

 

[Silly Sausage]

hi guys,

what is the MOST likely cause of a high resistance MEASUREMENT when testing continuity of cpc?

Also, a bad contact with your probes for the above.
Have a good scratch with your probe tips or crocs to make sure you get a good contact.

 

[Knobhead]

Tell us what you think could cause the problem. We'll help then, this isn't a homework site.

 

[paulthemagpie]

Tell us what you think could cause the problem. We'll help then, this isn't a homework site.

tony i agree. but if you look at the question i have wrote what the problems could be.

 

[Richard Burns]

Most likely would be an insecure termination.
Corrosion, wrong size cables, poor continuity of conduit used as cpc, would all be longer term problems but the loose connection is more prevalent I would say, but Archy's one is good.

 

[paulthemagpie]

thanks guys,

yeah archy made a good point about the probe tips, but i think its looking more at faults on the installation.

thanks again guys

 

[MarkieSparkie]

hi guys,

what is the MOST likely cause of high resistance when testing continuity of cpc?... thanks magpie

Trying to prise the apprentice away from his mobile phone to do the job!:biggrinjester:

 

[Guitarist]

Is this the next batch of homework we are seeing now?

 

[sparks1973]

always grab both crocs around conductors...hold em firm when in DC low ohms.....best way that...
low batterys in MFTs/seperates will give stupid values sometimes.....as mentioned above high resistance joints...spurs of course and dirt/filth in shutters so wipe the plugtop in and out a bit till it clears and oxidisation/scale on bare CPCs (especially older cable).....