Criteria acceptance for Control Cables Continuity Test
Criteria acceptance for Control Cables Continuity Test
(OP)
Dear all:
For firefighting panel circuits our contractor is measuring 4 ohms for some cables.
Most of the cables have less than 1 ohm.
We are looking a norm to see the criteria acceptance.
Please advise if you have seen a similar issue.
Regards
For firefighting panel circuits our contractor is measuring 4 ohms for some cables.
Most of the cables have less than 1 ohm.
We are looking a norm to see the criteria acceptance.
Please advise if you have seen a similar issue.
Regards





RE: Criteria acceptance for Control Cables Continuity Test
Z
RE: Criteria acceptance for Control Cables Continuity Test
RE: Criteria acceptance for Control Cables Continuity Test
Thanks
RE: Criteria acceptance for Control Cables Continuity Test
Are there other wires in the tray with the wires that are giving 4 ohm readings? Crosstalk may be corrupting your measurement. Maybe you could try an AC impedance measurement. Or a brute force test with a power supply and a current meter (1V/1A = 1 ohm, 1V/0.25A = 4 ohm). That may overcome any crosstalk, but may give a false positive if your panel circuits aren't as strong.
Have you tried other testers?
1.5 ohms seems like a very generous specification. Unfortunately you are failing that badly.
Z