cable problems

[potatoman]

Hi ,how do you check the resistance of a cable thats about 140m long, goes through 3 consumer units and between the consumer units it is different sizes

 

[telectrix]

measure each section and addd up.

 

[potatoman]

can I use a ohm meter

 

[trev]

What options have you got?

 

[telectrix]

can I use a ohm meter

be better than using a gas meter.

 

[potatoman]

What options could I have

 

[trev]

None mate I was having a little giggle at your expense. Please accept my apology

 

[Guitarist]

can I use a ohm meter

With the greatest respect, are you the best person to be measuring a cable 140m long through 3 CUs?

 

[ackbarthestar]

Lol,.... However, the way this thread's heading a Gas meter well may be more appropriate.

 

[potatoman]

How about answering the question

 

[telectrix]

more to the point, why need to know?

 

[micknew]

Best answer is employ a trained sparks IMHO mate.

 

[telectrix]

How about answering the question

thought i did in post#2. measure the resistance of each section, the add them up. low ohm meter, then a pencil and paper ( or , if you are flush, a calculator.)

 

[micknew]

Seems like he might be trying to work out volt drop.

 

[Richard Burns]

Use a low resistance ohmmeter and a zeroed (very) long lead to measure the resistance of each section and add the resistances together.


If you have more than one of the same size conductor connect the conductors together at one end and measure the resistance between the two conductors at the other end and halve the result to get the resistance of one conductor.

 

[ackbarthestar]

How about answering the question

Its probably easier to Zs test at each db reduction point and compare the the results with the max Zs for each OPD.

 

[alarm man]

How about answering the question

how about learning to be a spark..

 

[potatoman]

I am no spark,but at least I know it,just spent 10k on a solar PV system ,the so called trained electrician never checked the AC cable like what has been sugested and now it does not work and all he wants to do now is increase the paramiters of the inverter

 

[Knobhead]

Leave it to him then. I take it the installation is guaranteed?

 

[ipf]

I am no spark,but at least I know it,just spent 10k on a solar PV system ,the so called trained electrician never checked the AC cable like what has been sugested and now it does not work and all he wants to do now is increase the paramiters of the inverter

How about getting him to provide a test certificate for the job done. For the 10k paid, I think it should be expected.

 

[alarm man]

I am no spark,but at least I know it,just spent 10k on a solar PV system ,the so called trained electrician never checked the AC cable like what has been sugested and now it does not work and all he wants to do now is increase the paramiters of the inverter

should have got a proper solar company in then..

 

[trev]

I must be missing something here. The cable from the PV system is 140m long and passes through 3 CUs and changes CSA?

 

[Guitarist]

How about answering the question

Exactly what you should be asking your electrician, not coming on to an electricians forum and demanding it from us. All of us here love to help when we can, if we think it is appropriate. In this case, you need to talk to your electrician, not get advice on how to put yourself in danger.

 

[benji]

could post a diagram of the cable route showing the 3 consumer units and the sizes of cable on route,(you could draw it as a single line with 3 boxes on it)