What cable should be used to extend CT Clamp cable?

[Marvin]

Hi 

 

What cable type is best to extend the reach of my CT clamp?

 

Marvin.

[ProDave]

Probably a single twisted pair cable.

[SteamyTea]

4 minutes ago, ProDave said:

Probably a single twisted pair cable.

Initially I thought that, but as it is measuring ripples won't they get cancelled.

 

Why do you need to extend it? The extra resistance may change the readings.

[ProDave]

A CT is a current transformer.  Depending how it is configured (load local to transformer or load in the measuring device) the cable will be conveying a 50Hz voltage or current.

 

All you want is that signal to arrive at it's load with no loss, and not picking up any externally induced signal, hence the twisted pair.

[Marvin]

1 hour ago, SteamyTea said:

Why do you need to extend it? The extra resistance may change the readings.

The inverter is 15m of cable from the grid supply.

[Marvin]

1 hour ago, ProDave said:

A CT is a current transformer.  Depending how it is configured (load local to transformer or load in the measuring device) the cable will be conveying a 50Hz voltage or current.

 

All you want is that signal to arrive at it's load with no loss, and not picking up any externally induced signal, hence the twisted pair.

I was thinking of using Cat5 cable...

[Marvin]

Or Is STP cable better as it will need to run near mains..?

[Onoff]

This might help?

 

https://www.se.com/uk/en/faqs/FA221505/